Relazione ScientificaAprile2012
Transcription
Relazione ScientificaAprile2012
Scuola di dottorato di ricerca in Nanotecnologie Resoconto dell’attività 2011 Sommario 1. 2. 3. Relazione scientifica riassuntiva .................................................................................................. 3 Elenco dottorandi, supervisori e titolo delle tesi .......................................................................... 6 Schede attività dottorandi........................................................................................................... 10 Dottorandi del 24 ciclo:.................................................................................................................. 11 Dottorandi del 25 ciclo: • ............................................................................................................... 43 Dottorandi del 26 ciclo:.................................................................................................................. 63 Progetti Dottorandi del 27 ciclo: .................................................................................................... 93 4. Pubblicazioni dei dottorandi. ................................................................................................... 202 5. Giudizi dei referee esterni per dottorandi ammessi all’esame finale aprile 2012 .................... 210 6. Giudizi della commissione d’esame finale aprile 2012 ........................................................... 211 7. Elenco dei componenti del collegio docenti ............................................................................ 215 8. Produzione scientifica del collegio docenti 2007-2012 ........................................................... 218 Personale di ruolo nelle università italiane e INAF ..................................................................... 218 Personale non di ruolo nelle università o dipendenti di altri enti................................................. 261 9. Criteri di valuatazione delle scuole di dottorato ...................................................................... 267 10. Valutazione da parte del nucleo di valutazione dell’Ateneo .................................................... 270 11. Giudizi dei referee esterni per dottorandi ammessi all’esame finale aprile 2012 .................... 271 12. Presentazioni dei dottorandi al congesso del gennaio 2012 ..................................................... 272 Attività della scuola: situazione ad aprile 2012. Questo documento contiene il dettaglio dell’attività didattico scientifica della scuola di dottorato in nanotecnologie svolto durante l’anno 2011 fino ad aprile del 2012. Il documento si compone delle seguenti parti: 1. Relazione scientifica riassuntiva (Executive summary) 2. Elenco dei dottorandi, supervisori e titolo tesi in corso. 3. Schede di attività dei dottorandi che hanno svolto attività continuativa nell’anno 2011. Questa attività è stata presentata nel congresso di gennaio 2012 (vedi slides su CD allegato) ed è riassunto per ogni dottorando nelle schede riportate di seguito. Le schede si riferiscono ai dottorandi in corso dei cicli 24, 25 e 26, non esssendoci dottorandi in proroga da cicli precedenti. 4. Progetti dei dottorandi nuovi entrati nella scuola (27 ciclo). Questa attività non è stata presentata in gennaio 2012 poiché non ancora definiti gli accoppiamenti dottorando – tema di ricerca. 5. Riassuntivo delle pubblicazioni dei dottorandi. 6. Giudizi della commissione d’esame finale 2012. 7. Elenco dei componenti collegio docenti. 8. Pubblicazioni rappresentative del collegio docenti. 9. Criteri di valutazione delle scuole di dottorato. 10. Valutazione della scuola da parte del nucleo di valutazione riassunta in una tabella e rimandi ad allegati. 11. Giudizi dei reviewer esterni per i dottorandi ammessi all’esame finale (allegati). 12. Presentazioni dei dottorandi al congresso gennaio 2012 (allegati). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 2 1. Relazione scientifica riassuntiva La missione della scuola di dottorato è di migliorare le conoscenze ed educare studenti nel campo delle nanotecnologie al fine di formare scienziati e tecnici per il 21° secolo. La caratteristica della Scuola è l’interdisciplinarità: sugli argomenti di ricerca attivi lavorano in sinergia fisici, chimici, biologi, ingegneri, medici, farmacologi, odontoiatri, biotecnologi e laureati in Agraria, mantenendo e rafforzando la specificità della cultura di provenienza ed acquisendo la capacità di sviluppare la propria ricerca in un quadro più ampio. L’obiettivo principale della Scuola è di formare Ricercatori che sappiano progettare, costruire, utilizzare e sottoporre a prove di funzionalità strumenti e dispositivi nano tecnologici, in grado di rispondere alle crescenti e diversificate esigenze delle applicazioni. L'allievo “dottorato” di questa Scuola sarà un professionista della ricerca e dello sviluppo tecnologico che sappia applicare le proprie conoscenze, con capacità di valutazione critica, allo sviluppo di metodi di progettazione, produzione e valutazione di nuovi materiali e al miglioramento di quelli esistenti. Questo anche mirato ad una produzione industriale più efficace, economica e sostenibile dal punto di vista delle risorse e dell'ambiente. La scuola è stata fondata nel 2006 a partire da un dottorato in nanotecnologie. Gli obiettivi delle ricerche sono i seguenti: Sviluppo di nuove tecniche sperimentali per lo studio, la lavorazione, la manipolazione e la visualizzazione su scala nanometrica di materiali nanostrutturati. Sviluppo di tecniche spettroscopiche di rivelazione di singola molecola su substrati nanostrutturati. Studio delle relazioni tra la microstruttura e le proprietà dei materiali e ingegnerizzazione di materiali nanostrutturati. Sintesi di nanostrutture. Applicazioni delle nanotecniche e nanostrutture a ricerche di interesse biomedico ed energetico. Modellizzazione molecolare multiscala di materiali e di fenomeni di interesse attraverso tecniche di simulazione computazionale. Salute umana con particolare attenzione allo studio ed al trattamento di tumori e malattie degenerative. Applicazione delle nanotecnologie nei settori medico, farmacologico, biomedico ed agroalimentare. Questi obiettivi sono perseguiti avvalendosi delle attrezzature d'avanguardia disponibili nei laboratori dell'Università di Trieste e degli Enti di ricerca pubblici e privati convenzionati con l’Università di Trieste, come da seguente tabella: Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 3 n. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Tipologia del soggetto Istituto/Ente di Ricerca non accademici (compreso IRCCS) Istituto/Ente di Ricerca non accademici (compreso IRCCS) Istituto/Ente di Ricerca non accademici (compreso IRCCS) Istituto/Ente di Ricerca non accademici (compreso IRCCS) Istituto/Ente di Ricerca non accademici (compreso IRCCS) Istituto/Ente di Ricerca non accademici (compreso IRCCS) Istituto/Ente di Ricerca non accademici (compreso IRCCS) Istituto/Ente di Ricerca non accademici (compreso IRCCS) Privato non di ricerca Istituto/Ente di Ricerca non accademici (compreso IRCCS) Pubblico/Privato PUBBLICO Denominazione del soggetto Sincrotrone Trieste S.C.p.A. PUBBLICO Laboratorio Nazionale TASC-IOM CNR PUBBLICO PUBBLICO ICGEB – International Centre for Genetic Engineering and Biotechnology IRCSS Burlo Garofolo - Trieste PUBBLICO CRO Aviano PUBBLICO PUBBLICO Istituto Nazionale dei tumori di Milano Fondazione IRCSS CNR - Institute of Chemistry of OrganoMetallic Compounds AIRC PRIVATO PUBBLICO Indistrie Bracco Fondazione Callerio - Trieste PUBBLICO Gli studenti di dottorato nel periodo in esame hanno svolto stage presso aziende ed enti di ricerca. I più significativi sono i segnueti: STAGE IN ITALIA n. Pubblico/Privato 1. PUBBLICO 2. 3. 4. 5. PUBBLICO PUBBLICO PUBBLICO MISTO 6. PUBBLICO Denominazione del soggetto CNR-IOM TASC Laboratorio Trieste Elettra Sincrotrone Trieste IRCCS Burlo Garofalo CRO Aviano Centro Biomedicina Molecolare (CBM) Università di Udine STAGE ALL'ESTERO n. 1. 2. 3. 4. 5. 6. 7. 8. Denominazione del soggetto Max Plank Institute - Halle CNRS - Marsiglia University Poznan - Center for nanotechnology Ohio University, Athens (OH) Technische Universität di Monaco di Baviera Soft Matter Physics Division - Leipzig Università di San Pietroburgo Technische Universitaet - Institut fuer Chemie Max-Volmer-Laboratorium für Biophysikalische Chemie Paese Germania Francia Polonia Stati Uniti d'America Germania Germania Russai Germania Di seguito alcuni numeri rappresentativi dell’attività della scuola: n. di studenti (ad aprile 2012): 52 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 4 Numero di diplomati nel 2012: 12 Numero di diplomati nel 2011: 8 Numero di diplomati nel 2010: 7 Numero di diplomati nel 2009: 6 Numero di diplomati nel 2008: 9 Numero di diplomati nel 2007: 14 Membri del collegio docenti: 45 Enti di ricerca coinvolti nel dottorato: oDipartimenti dell’Università di Trieste: 5 (in diminuzione per accorpamenti) oEnti di ricerca esterni: 10 oAltre Università: 4 Numero di pubblicazioni degli studenti: oAnno 2007: 67 oAnno 2008: 68 oAnno 2009: 72 oAnno 2010: 105 oAnno 2011: 95 Numero di pubblicazioni di supervisori e tutors (2006-11): 982+141 = 1123 Risorse finanziarie (per anno): 600.000 euro Ultima valutazione complessiva del nucleo dell’Università di Trieste: A+ (Ottimo) I criteri usati per la valutazione interna sono stati quelli suggeriti dal Ministero, accompagnati da criteri interni all’Ateneo. Questi criteri sono descritti di seguito in questo documento in modo dettagliato. I principali indicatori utilizzati dal nucleo che hanno permesso la valutazione in classe A+ sono (vedi capitolo 10 per maggiori dettagli): produzione scientifica del Collegio Docenti; congruo numero di docenti dell’Ateneo coinvolti nel collegio; rapporto del dottorato con il mondo del lavoro; attrattività del dottorato nelle precedenti edizioni; livello di soddisfazione dei dottorandi; produzione scientifica dei dottorandi ed iniziative esistenti di pubblicizzazione e referaggio delle tesi di dottorato; adeguata formulazione delle tematiche scientifiche e degli obiettivi formativi, riduzione della frammentazione dei corsi di dottorato; accuratezza delle informazioni fornite per la valutazione; presenza di iscritti stranieri; sito web del dottorato. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 5 2.Elenco dottorandi, supervisori e titolo delle tesi La situazione riportata in tabella è quella ad aprile 2012, quindi include i dottorandi del 27 ciclo e non quelli del 24 ciclo diplomati ad aprile. Dottorando Ciclo Supervisore ABDOLLAHZADEH 27 SCOLES Iman Giacinto AMBROSINI 25 RUBINI Silvia Stefano SSD FIS/03 ANGELONI Valeria 27 BRESCHI Lorenzo MED/28 BIDOGGIA Silvia 25 PASQUATO Lucia CHIM/06 BORIN Daniele FIS/03 CAPOLLA Sara 27 LAZZARINO Marco 27 MACOR Paolo CASSESE Damiano 26 LAZZARINO Marco FIS/03 CECCHINI Paolo 27 TOGNETTO Daniele MED/30 CHEN Yan Xin 25 FORNASIERO Paolo CHIM/03 COCEANO Giovanna CORVAGLIA Stefania COVA Andrea 27 COJOC Dan FIS/03 26 CASALIS Loredana 27 BRESCHI Lorenzo FIS/03 DAL COL Valentina 26 PRICL Sabrina INGIND/24 FIS/01 MED/04 MED/28 NomeDip Department of Physics - DF Department of Physics - DF Titolo Tesi Nanotechnology approaches for the detection of circulating tumor cells Sintesi di nanostrutture di semiconduttori e loro studio mediante luce di sincrotrone. Clinical Department Effect of chlorexidine in the hybrid of Medical Science, layer nano leakage in adhesive Surgery and Healt - dentistry DCSMCS Department of Gold nanoparticles as carriers for Chemical and drug delivery applications Pharmaceutical Sciences - DSCF Department of Micro mechanical oscillators for Physics - DF biochemical applications Department of Life Use of chemotherapic-loaded Sciences - DLS nanoparticles in the treatment of cancer Department of Design and realization of Physics - DF nanoelectromechanical and plasmonic devices for Raman spectro-microscopy Clinical Department Bio-Materials in oculist micro of Medical Science, surgery Surgery and Healt DCSMCS Department of Nanostructured Titanium Dioxide Chemical and Based Materials for Photocatalysis Pharmaceutical and Phototelectrocatalysis Sciences - DSCF Department of Characterization of the mechanical Physics - DF properties of cancer cells Department of Shaping substrates at the nanoscale Physics - DF for single cell characterization Clinical Department Role of collagen cross-linkers on of Medical Science, the stability of the bonded Surgery and Healt - interface DCSMCS Department of In silicio prediction of drug Engineering and resistance: from cancer targeted Architecture - DIA therapy to cancer targeted prevention Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 6 Dottorando Ciclo Supervisore DIOLOSA‘ Marina 27 CADENARO Milena ELISEI Elena FORNASARO Stefano FRASSETTO Andrea GANAU Mario GANBOLD Tamiraa GIORGIS Valentina IONESCU Andrei Cristian LOVAT Giacomo LUCAFO' Marianna MARSICH Lucia MARSON Domenico MINIUSSI Elisa MITRI Elisa SSD NomeDip MED/28 Clinical Department of Medical Science, Surgery and Healt DCSMCS 27 CESARO Attilio CHIM/04 Department of Life Sciences - DLS 27 PASSAMONTI BIO/10 Department of Life Sabina Sciences - DLS Titolo Tesi Development of a new nanoengineered biopolymer-based dental adhesive system Nanostructured biomolecular glasses Targeting natural antioxidant compounds to the brain: a metabolomic assessment. 26 CADENARO MED/28 Clinical Department Nanostructural analysis of the Milena of Medical Science, adhesive interface in dentistry Surgery and Healt DCSMCS 25 SCOLES FIS/03 Department of Nanotechnology applications in Giacinto Physics - DF quantitative neuroscience: proteomics assessment of astrocyte stressing and neuronal plasticity 27 BIASIOL Giorgio FIS/03 Department of Development of quantum well Physics - DF structures for multi band photon detection 25 ROMANATO FIS/03 Department of Design, fabrication and Filippo Physics - DF characterization of metamaterials inspired plasmonic structures for sensing application 27 CADENARO MED/28 Clinical Department The influence of resin-based dental Milena of Medical Science, materials upon oral biofilms Surgery and Healt - development. DCSMCS 27 MORGANTE FIS/03 Department of Study of charge transfer processes Alberto Physics - DF at interfaces for photovoltaic applications 25 SAVA Gianni BIO/14 Department of Life Study of carbon nanostructures as Sciences - DLS carriers for drugs for cancer chemotherapy. 25 SERGO Valter INGDepartment of Design and synthesis of IND/22 Engineering and functionalized metal nanoparticles Architecture - DIA for bio-analysis with SurfaceEnhanced Raman Scattering (SERS) 27 PRICL Sabrina INGDepartment of Computer-assisted design of IND/24 Engineering and nanovectors for gene therapy Architecture - DIA 26 BARALDI FIS/03 Department of Interaction of metal nanoclusters Alessandro Physics - DF with graphene and low dimensional systems 26 TORMEN FIS/03 Department of Fabrication of microfluidic devices Massimo Physics - DF for studying living cells, responding to external stimuli, by vibration spectroscopies Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 7 Dottorando Ciclo Supervisore NKOUA 27 SCOLES Ngavouka Giacinto Maryse Dadina OTTAVIANI Giulia 27 ZACCHIGNA Serena SSD FIS/03 MED/28 Clinical Department of Medical Science, Surgery and Healt DCSMCS FIS/03 Department of Physics - DF FIS/03 Department of Physics - DF PALMA Giuseppina PANIGHEL Mirco 26 FRALEONI Alessandro 27 MORGANTE Alberto PERONIO Angelo 25 COMELLI FIS/03 Giovanni 27 LAZZARINO FIS/03 Marco 27 CESARO Attilio CHIM/04 PIANTANIDA Luca PITTIA Paola RADIVO Andrea 26 TORMEN Massimo ROMEO Michele 26 FRONZONI Giovanna SAJID Hussain NomeDip Department of Physics - DF FIS/03 Department of Physics - DF Department of Physics - DF Department of Life Sciences - DLS Department of Physics - DF CHIM/02 Department of Chemical and Pharmaceutical Sciences - DSCF 26 BIASIOL Giorgio FIS/03 Department of Physics - DF SALGADO Bernardes Pereira Simâo Pedro SAMMITO Davide 27 FERMEGLIA Maurizio INGIND/24 Department of Engineering and Architecture - DIA 25 ROMANATO Filippo FIS/03 Department of Physics - DF SANTESE Francesca 26 FERMEGLIA Maurizio SCOTTI Nicola 27 BRESCHI Lorenzo STOKELJ Tina 27 FERMEGLIA Maurizio Titolo Tesi Application of AFM based immune assays to few cells proteomics Use of nanotechnology for the evaluation of the effect of laser therapy on neo-angiogenesis tumor in vivo and in vitro Nanostructured dye-sensitized solar cells Organic Molecules and Carbon Nanotubes Assembled on Metal Surfaces:Properties and Applications in Molecular Electronics and Photovoltaics Single-molecule heterogeneous catalysis Plasmonic ruler and the applications to the DNA origami Nanotecnology for food science Experimental study of the physics of nanostructured organic photovoltaic devices. Development and applications of methodologies TDDFT for the simulation of core spectrum for condensed matter. Syntesis of ordered semiconductor nanostructures by directed selfassembly for photonic applications Multiscale Modelling of Complex Material Systems Morphology Design, Fabrication and Characterization of Plasmonic Nanostructures for Solar Cells Light Harvesting Enhancement. INGDepartment of Multiscale molecular modeling for IND/24 Engineering and nanostructured multifunctional Architecture - DIA materials and coatings MED/28 Clinical Department Laboratory evaluation of several of Medical Science, nanofilled dental resin composites Surgery and Healt - mechanical and chemical properties DCSMCS INGDepartment of Agri-food Nanotechnology IND/24 Engineering and Architecture - DIA Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 8 Dottorando STOPAR Alex TARUSHA Lorena TAVAGNACCO Letizia Ciclo Supervisore 27 TOFFOLI Giuseppe SSD FIS/03 NomeDip Department of Life Sciences - DLS 27 PAOLETTI BIO/10 Department of Life Sergio Sciences - DLS 26 CESARO Attilio CHIM/04 Department of Life Sciences - DLS VAIDYA Shital 26 GOTTER Roberto FIS/03 Department of Physics - DF VEGA Marienette 27 SERGO Valter INGIND/22 VENTURELLI Leonardo 27 SCOLES Giacinto FIS/03 Department of Engineering and Architecture - DIA Department of Physics - DF VIRGILIO Francesca 26 TORMEN Massimo FIS/03 WANG Lianqui 27 FORNASIERO Paolo ZANNIER Valentina ZANUSSO Chiara 27 RUBINI Silvia CHIM/03 Department of Chemical and Pharmaceutical Sciences - DSCF FIS/03 Department of Physics - DF BIO/14 Department of Life Sciences - DLS 24 TOFFOLI Giuseppe Department of Physics - DF Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 Titolo Tesi Innovative Tools for Pharmacogenetics and Pharmacogenomics: Protein-Nucleic Acid Interactions Within SelfAssembled Nanosystems Novel nanostructured biomaterials for biomedical applications How do water molecules probe and control bionanostructures and food functionalities Low-dimensional magnetic materials: the electronic structure and correlation effects Raman and fluorescence spectroscopy of biomedical nanomaterials Application of Micro mechanical oscillators to miRNA detection for heart diseases Development of electrochemical sensors by nanofabrication techniques for biological and medical diagnostics Design, synthesis and characterization of nanostructured materials for electrocatalysis Synthesis and characterization of semiconductor nanowires Nanotechnologies and oncology: pharmacokinetics and pharmacogenomics to optimize the antitumor therapie 9 3.Schede attività dottorandi Questo allegato contiene le schede dei dottorandi della scuola di nanotecnologia così come sono pervenute al 31 gennaio 2012. Sono quindi incluse le schede dei dottorandi dei cicli 24, 25 e 26. Dottorandi del 24 ciclo: CARGNELLO Matteo, COZZARINI Luca, D’ESTE Elisa, ERA Daniel, FIOR Raffaella, LANZILOTTO Valeria, LUISI Immacolata, MARINI Monica, MIGLIORINI Elisa, PAKDAST Hossein, SCIUTO Giacomo, TAVANO Federica, ZANUSSO Chiara. Dottorandi del 25 ciclo: AMBROSINI Stefano, BIDOGGIA Silvia, CHEN Yan Xin, GANAU Mario, GIORGIS Valentina, LUCAFO' Marianna, MARSICH Lucia, PERONIO Angelo, SAMMITO Davide Dottorandi del 26 ciclo: CASSESE Damiano, CORVAGLIA Stefania, DAL COL Valentina. FRASSETTO Andrea, MINIUSSI Elisa, MITRI Elisa, PALMA Giuseppina, RADIVO Andrea, ROMEO Michele, SAJID Hussain, SANTESE Francesca, TAVAGNACCO Letizia, VAIDYA Shital, VIRGILIO Francesca. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 10 Dottorandi del 24 ciclo: MATTEO CARGNELLO Laboratorio di lavoro: lab. 439-523 Dip. Sc. Chimiche e Farmaceutiche, Edificio C11 Titolo della tesi: Tailored nanoarchitectures based on transition metals for heterogeneous catalysis Supervisore: Prof. Paolo Fornasiero Tutori: Prof. Raymond J. Gorte (UPenn, USA), Dr. Tiziano Montini Attività di ricerca L’attività di ricerca del terzo anno di dottorato è stata focalizzata su vari aspetti: - Il completamento della caratterizzazione dei materiali preparati durante il corso del primo e del secondo anno; - l’estensione della procedura di incapsulamento ad altre combinazioni metallo-ossido per ottenere strutture disperdibili; - la sintesi di particelle metalliche di dimensioni precise e variabili per la preparazione di catalizzatori eterogenei modello e il loro studio in condizioni di reazione reali. Durante il corso del primo e del secondo anno di dottorato sono stati preparati materiali a base di Cu, Pd e Au incapsulati nella ceria (CeO2) che sono stati caratterizzati utilizzando la spettroscopia di assorbimento di raggi X, la microscopia elettronica a scansione a trasmissione e il chemiadsorbimento (dati pubblicati). Inoltre, abbiamo dimostrato che le strutture disperdibili Pd@CeO2 possono essere utilizzate nella preparazione di catalizzatori attivi e stabili da impiegare nelle celle a combustibile ad ossidi solidi (Solid Oxide Fuel Cells - SOFC) (dati pubblicati). L’approccio di incapsulamento è risultato particolarmente promettente per il palladio e questa procedura è stata quindi estesa ad altre combinazioni di metalli e ossidi. Inizialmente, è stata sviluppata una procedura più semplice e flessibile per preparare particelle di Pd variamente funzionalizzate in cui i monostrati organici sono facilmente modificabili in composizione. L’attività catalitica e la riciclabilità delle particelle sono state dimostrate in reazioni organiche di coupling (dati pubblicati). Il metodo di embedding per l’ottenimento di strutture disperdibili è stato quindi esteso ad un core di Pt e a shells di TiO2 e ZrO2. Questi risultati dimostrano la versatilità del metodo e la ampia applicabilità della procedura con il risultato che diverse nanostrutture possono essere disperse su supporti o usati in soluzione. Tutti i materiali preparati sono stati approfonditamente caratterizzati con tecniche di microscopia a la loro attività in reazioni in fase gassosa è stata studiata (dati inviati per la pubblicazione). Infine, la preparazione di nanocristalli monodispersi di metalli d8 (Ni, Pd e Pt) è stata realizzata e le particelle ottenute sono state utilizzate per la preparazione di catalizzatori modello supportati su CeO2 o Al2O3. L’attività catalitica di tali sistemi modello è stata studiata nelle reazioni di ossidazione del CO e conversione del gas d’acqua (WGSR) in condizioni di reazione reali. Ciò ha permesso l’ottenimento di importanti informazioni sul meccanismo di reazione e sulla sua dipendenza con la dimensione delle particelle e del supporto. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 11 Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa) 1) M. Cargnello, A. Gasparotto, V. Gombac, T. Montini, D. Barreca and P. Fornasiero, "Photocatalytic H2 and added-value byproducts: the role of metal oxide systems in their synthesis from liquid oxygenates.", European Journal of Inorganic Chemistry 2011 (2011), 4309-4323, selected as cover article. 2) M. Cargnello, N. L. Wieder, P. Canton, T. Montini, G. Giambastiani, A. Benedetti, R. J. Gorte and P. Fornasiero, "A Versatile Approach to the Synthesis of Functionalized Thiol-protected Palladium Nanoparticles.", Chemistry of Materials 23 (2011), 3961-3969. 3) J.-S. Kim, N. L. Wieder, A. J. Abraham, M. Cargnello, P. Fornasiero, R. J. Gorte and J. M. Vohs, "Highly Active and Thermally Stable Core-Shell Catalysts for Solid Oxide Fuel Cells.", Journal of the Electrochemical Society 158 (2011), B596-B600. 4) N. L. Wieder, M. Cargnello, K. Bakhmutsky, T. Montini, P. Fornasiero and R. J. Gorte, "A study of the water-gas-shift reaction over Pd@CeO2/Al2O3 core-shell catalysts.", The Journal of Physical Chemistry C 115 (2011), 915-919. 5) M. Cargnello, C. Gentilini, T. Montini, E. Fonda, S. Mehraeen, M. Chi, M. Herrera-Collado, N. D. Browning, S. Polizzi, L. Pasquato and P. Fornasiero, "Active and stable embedded Au@CeO2 catalysts for preferential oxidation of CO.", Chemistry of Materials 22 (2010), 4335-4345. 6) N. L. Wieder, M. Cargnello, K. Bakhmutsky, T. Montini, P. Fornasiero and R. J. Gorte, "A study of the water-gas-shift reaction over Pd@CeO2/Al2O3 core-shell catalysts.", The Journal of Physical Chemistry C (2010), in press, doi:10.1021/jp102965e. 7) V. Gombac, L. Sordelli, T. Montini, J. J. Delgado, A. Adamski, G. Adami, M. Cargnello, S. Bernal and P. Fornasiero, “CuOx-TiO2 Photocatalysts for H2 Production from Ethanol and Glycerol Solutions.”, The Journal of Physical Chemistry A 114 (2010), 3916-3925. 8) M. Cargnello, N. L. Wieder, T. Montini, R. J. Gorte and P. Fornasiero, "Synthesis of dispersible Pd@CeO2 nanostructures by self-assembly.", Journal of the American Chemical Society 132 (2010), 1402-1409. 9) M. Cargnello, T. Montini, S. Polizzi, N. L. Wieder, R. J. Gorte, M. Graziani and P. Fornasiero, “Novel embedded Pd@CeO2 catalysts: a way to active and stable catalysts.”, Dalton Transactions 39 (2010), 2122-2127. 10) L. De Rogatis, M. Cargnello, V. Gombac, B. Lorenzut, T. Montini and P. Fornasiero, “Embedded phases: a way to active and stable catalysts.”, ChemSusChem 3 (2010), 24-42. Capitoli/sezioni di libri/volumi 1) L. De Rogatis, T. Montini, V. Gombac, M. Cargnello and P. Fornasiero, “Stabilized metal nanoparticles embedded into porous oxides: a challenging approach for robust catalysts.”, in Nanorods, Nanotubes and Nanomaterials Research Progress (2008), Wesley V. Prescott and Arnold I. Schwartz Editors, Nova Science Publishers, 2008, New York, pp. 71-123. Partecipazione a congressi (come relatore) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 12 - “Metal-doped TiO2 for hydrogen production”, V. Gombac, T. Montini, M. Cargnello, M. Graziani and P. Fornasiero, Slovenian Conference on Materials and Technologies for Sustainable Growth, oral presentation, University of Nova Gorica, Ajdovscina, Slovenia, 12th May 2009 - Informal workshop Scuola di Dottorato di Ricerca in Nanotecnologie and Int. Max-Planck Research School for Science and Technology of Nanostructures, oral presentation “Rare-earths oxides-based nanostructures as heterogeneous catalysts”, Max Planck Institute of Microstructure Physics, Halle, 15th-16th July 2009 - “I giovani e la chimica in Friuli-Venezia Giulia”, oral presentation “Self-assembled materials based on metallic nanoparticles for heterogeneous catalysis”, Department of Chemistry, University of Trieste, 24th September 2009 - “Active and stable Au catalysts for H2 purification”, T. Montini, M. Cargnello, C. Gentilini, L. Pasquato, P. Fornasiero, S. Mehraeen, N. D. Browning, E. Fonda, GOLD 2009, 5th international conference on gold technology and applications, Heidelberg (Germany), poster presentation, 25th30th July 2009 - 2nd PhD workshop, Martin-Luther Universitat Halle-Wittenberg, Wittenberg, Germany, poster presentation “Active and stable Au catalysts for H2 purification”, 10th-11th September 2009 - XV National School of Organometallic Chemistry, oral presentation “Pd@CeO2 dispersible structures prepared by self-assembly for heterogeneous catalysis.”, Matteo Cargnello, Noah Wieder, Tiziano Montini, Raymond J. Gorte and Paolo Fornasiero, Bertinoro (FC), 23-27 May 2010 - “Embedded phases: a way to active and stable catalysts.”, M. Cargnello, lecture, Universidad de Cadiz (Spain), Facultad de Ciencias, Departamento de Ciencia de Materiales e Ingeniería Metalúrgica y Química Inorgánica, 10th June 2010 - XXXVIII National Congress of the Inorganic Chemistry Division of the Italian Chemical Society, Trieste, Italy, “Embedded metal nanoparticles as heterogeneous catalysts: advantages and disadvantages.”, M. Cargnello, P. Fornasiero, V. Gombac, M. Graziani, B. Lorenzut and T. Montini, poster presentation, 14 September 2010. - M. Cargnello, N. Wieder, R. J. Gorte and P. Fornasiero, "Synthesis of dispersible core-shell metal@oxide materials and their application as stable fuel cell catalysts.", invited speaker at the conference "Chemically synthesized nanoparticles and catalysis", Argonne National Lab (Argonne, IL, USA), 28th April 2011. - M. Cargnello, R. J. Gorte and P. Fornasiero, "Synthesis of dispersible core-shell metal@oxide materials and their application as stable fuel cell catalysts.", ICTP-SISSA Workshop on New Materials for Renewable Energy, ICTP, Trieste, Italy, 17th-21st October 2011. Partecipazione a congressi (come co-autore) - “Photocatalytic H2 production over optimized CuOx-TiO2 nanocomposites.”, V. Gombac, T. Montini, L. Sordelli, M. Cargnello, M. Graziani, P. Fornasiero, Summer School in catalysis 2009, Porto Carras, Greece, May 2009 (poster presentation by V. Gombac) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 13 - “Design of active and stable catalysts for H2 purification.”, T. Montini, M. Cargnello, C. Gentilini, L. Pasquato, P. Fornasiero, S. Mehraeen, N. D. Browning, E. Fonda, E-MRS 2009 Spring Meeting, Strasbourg, June 2009 (oral presentation by T. Montini) - “Photocatalytic H2 production over optimized CuOx-TiO2 nanocomposites.”, P. Fornasiero, V. Gombac, T. Montini, L. Sordelli, M. Cargnello, M. Graziani, VII Convegno Nazionale Consorzio Scienza e Tecnologia dei Materiali, Tirrenia, Italy, June 2009 (oral presentation by P. Fornasiero) Attività formativa Periodi di permanenza all’estero (data e Sede) - Research center ICCOM-CNR Florence, Sesto Fiorentino, AFM experiments, 1-7 February 2009 - Sinchrotron Soleil, Gif-sur-Yvette, Paris, EXAFS experiments, 19-23 February 2009 - Indian Institute of Technology, Chennai, 31 March – 5 April 2009 - Universidad de Cadiz (Spain), Facultad de Ciencias, Departamento de Ciencia de Materiales e Ingeniería Metalúrgica y Química Inorgánica, Prof. S. Bernal and Dr. J. J. Delgado, 1st June – 31st July 2010 - Universidad de Cadiz (Spain), Facultad de Ciencias, Departamento de Ciencia de Materiales e Ingeniería Metalúrgica y Química Inorgánica, Prof. S. Bernal and Dr. J. J. Delgado, 28th February – 9th March 2011 - University of Pennsylvania, Department of Chemistry and Materials Science and Engineering, Prof. Christopher B. Murray, 1st April – 30th September 2011 Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) - “Tecniche di caratterizzazione con luce di sincrotrone”, Prof. G. Vlaic, corso di laurea magistrale in chimica, 40 hours - “Proprietà fisiche dei materiali”, Prof. A. Franciosi, corso di laurea magistrale in chimica, 40 hours - Course “Molecular self-assembling and nanostructures”, Dr. L. Casalis, Prof. A. Morgante, Prof. L. Pasquato, 8 hours - Course “Advanced Microscopy”, Dr. L. Felisari, Dr. C. Africh, 14 hours - Course “Photoemission Spectroscopies”, Prof. A. Baraldi, 11 hours Congressi, seminari, corsi avanzati e altre attività didattiche passive - Annual meeting PhD School in Nanotechnology, 13-15 January 2009, total 20 hours - “Information meetings for doctoral students”, 30 June 2009, 3 hours - “Seminar on writing (and managing) a research project”, 16th October 2009, 4 hours - Annual meeting PhD School in Chemical and Pharmaceutical Sciences and Technologies, 21-23 January 2009, total 10 hours - 1st International Conference on Nanustructured Materials, Kottayam, Kerala (India), 6-8 April 2009 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 14 - Conference “Modeling reactions at the nanoparticle scale”, Prof. P. Westmoreland, 8 May 2009 - Conference “Chimica fisica delle interfasi in sistemi nanostrutturati”, Dr. I. Colombo, 15 May 2009 - Conference “Supramolecular Chemistry of Naphthalenediimides”, Dr. G. Dan Pantos, 8 June 2009 - Conference “New chemistry of dithiolenes: from biomimetic models to sensor”, Prof. Partha Basu, 13 July 2009 - Conference “NMR Techniques for Investigating the Supramolecular Structure in Solution”, Prof. Alceo Macchioni, 17 September 2009 - 3rd year PhD students presentations, 26 November 2009 - Annual meeting PhD School in Chemical and Pharmaceutical Sciences and Technologies, 18-20 January 2010, total 10 hours - Seminar on “How to present scientific results”, Dr. Hanna Mamzer, 22 January 2010, 7 hours - Seminar “Combustili solari: nuove opportunità per la ricerca”, Prof. S. Perathoner, 1 March 2010, 1 hour - Seminar “Energia per il XXI secolo”, Dr. N. Armaroli, 25 March 2010, 2 hours - Sessione TEM, Dipartimento di Chimica Fisica, Università Cà Foscari di Venezia, Mestre, 14 Aprile 2010 - Sessione TEM, Dipartimento di Chimica Fisica, Università Cà Foscari di Venezia, Mestre, 14 Maggio 2010 - TEM-UCA Summer Workshop “Transmission Electron Microscopy on Catalytic Materials and Nanoparticles”, Universidad de Cadiz (Spain), 12th-16th July 2010 - XXXVIII National Congress of the Inorganic Chemistry Division of the Italian Chemical Society, Trieste, Italy, 13-16 September 2010 - Seminar “Can CexZr1-xO2 materials be suitable supports for polioxometallates?”, Prof. G. Ranga Rao, 29 September 2010 - Seminar “Metal oxide nanomaterials in sensors and biomedicine”, Prof. Sangeeta Kale, 23 November 2010 - 3rd year PhD students presentations, 23 November 2010 - Durante l’anno 2011, sono state seguite numerose conferenze durante il periodo alla University of Pennsylvania. Attività didattica di supporto e attività didattica attiva - Attività di tutorato per il Laboratorio di Chimica Generale per Scienze Geologiche con il Prof. P. Fornasiero, totale 50 ore - Esercizi di Chimica Generale e Stechiometria per il Corso Integrato di Chimica Generale per Biotecnologie, STAN e Scienze Geologiche, 10 ore Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 15 LUCA COZZARINI Titolo della tesi: Supervisore: “Nanomaterials based on II-VI semiconductor quantum dots” Dr. Vanni Lughi Attività di ricerca Attività svolta nel terzo anno Nel corso del mio terzo anno di ricerca mi sono dedicato a diverse attività: (a) durante il mio periodo di permanenza presso il NREL1, mi sono occupato di: (i) preparazione superficiale di cristalli di ossido di titanio (sia anatase che rutile), di ossido di zinco e titanato di stronzio; (ii) assemblaggio di monolayers di nanocristalli di solfuro di piombo sugli ossidi sopraelencati; (iii) misure fotoelettriche e ottiche su ossidi sensitivizzati con nanocristalli di solfuro di piombo; (iv) caratterizzazione di leganti organici superficiali su nanocristalli di solfuro di piombo, con spettroscopia IR e risonanza magnetica nucleare; (v) sostituzione di leganti organici superficiali; (vi) tentativi di misura della posizione dei livelli energetici di nanocristalli con voltammetria ciclica. (b) presso i laboratori del DI32, ho proseguito l’attività di ricerca volta all’ottenimento di un materiale semiconduttore a banda elettronica intermedia, partendo da nanocristalli di semiconduttori. Nel corso di quest’anno ho: (i) ottimizzato le procedure di cambio tensioattivo e assemblaggio su vari substrati; (ii) studiato tramite metodi ottici e diffrattometria X gli assemblati dopo diversi trattamenti termici (c) presso i laboratori del DI3, ho infine proseguito l’attività di ricerca avente come obiettivo la sintesi di fosfori secondari per LED, tramite: (i) sviluppo di sintesi di nanocristalli con composizione e proprietà ottiche personalizzate (controllo di lunghezza d’onda di emissione, larghezza di banda di emissione ed efficienza di luminescenza); (ii) inclusione di nanocristalli in una matrice polimerica trasparente (preservando le loro proprietà ottiche) Pubblicazioni/abstracts in conferenze o L. Pavan, L. Cozzarini, and V. Lughi, "Interdiffusion-controlled Optical Properties in Nanocrystalline Heterostructures and Nanostructured Materials", MRS Spring Meeting 2011, San Francisco, CA, USA, 28.04.2011 o L. Cozzarini, F. Antoniolli and V. Lughi, "Optical properties of a novel nanostructured CdS/CdTe material", SPIE Smart Structures/NDE, Conference 7890, San Diego, CA, USA, 06.03.2011 Partecipazioni a congressi (come relatore) o L. Cozzarini "Semiconductor Nanocrystals application to Optoelectronic Devices", Finmeccanica/Fulbright meeting 2011, Washington DC, USA, 15.03.2011 Attività formativa Periodi di permanenza all’estero 18 ottobre 2010 – 20 aprile 2011 (durata totale del periodo) presso il Solar Energy Research Facility del NREL, Golden, CO, USA. Ore di lezione seguite, III° anno (sostituite da lettura/studio personale): Libri: 1 National Renewable Energy Laboratory, 1617, Cole Boulevard, Golden, CO 80401, USA Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 16 A. L. Rogach, “Semiconductor Nanocrystal Quantum Dots”, ISBN 9788-3211-75235-7 C. Harris, M. D. Bertolucci, “Symmetry and Spectroscopy”, ISBN 0-486-66144-X Reviews: V. Klimov, “Spectral and Dynamical properties of multiexcitons in Semiconductor Nanocrystals”, Annu Rev Phys Chem, 58, 635 (2007) Ore di laboratorio svolte, III° anno o Circa 700 ore del lavoro di ricerca sono state svolte nei laboratori del DI3 o Circa 450 ore di laboratorio come ospite presso il Solar Energy Research Facility del NREL Congressi, seminari ed incontri organizzati dalla scuola “Summer School of Nanotechnology”, Università degli Studi di Trieste, 20-23.09.2011 Corsi avanzati seguiti – seminari – altre attività didattiche passive o MRS Spring Meeting 2011 conference, San Francisco, CA, USA, 25-29.04.2011 o C. G. Bailey (Rochester Institute of Technology) “Growth and Characterization of InAs QD array GaAs p-i-n Solar Cells”, seminario, National Renewable Energy Laboratory, 8.2.2011 o C. C. Tu (University of Washington-Seattle) “Solution-processed Optoelectronic Devices from Colloidal Inorganic Semiconductor Materials”, seminario, National Renewable Energy Laboratory, 15.2.2011 o M. Topic (University of Ljubljana) “PV module effective efficiency and performance mapping across Europe”, seminario, National Renewable Energy Laboratory, 15.2.2011 Attività didattica attiva o Circa 2 ore di supporto in laboratorio al corso “Materiali nanostrutturati”(prof. Vanni Lughi – II semestre, AA 2010-2011) o Co-relatore di una tesi di laurea triennale in Ingegneria Industriale (Mattia Castellucci, “Diffusione in Nanocristalli di Semiconduttori II-VI: analisi sperimentale”, AA 2010-2011). 2 Dipartimento di Ingegneria Industriale e dell’Informazione, Università degli Studi di Trieste, via Valerio 6A, 34127 Trieste, Italy Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 17 ELISA D’ESTE Titolo della tesi: BIO-SAMPLE ENVIRONMENT MANIPULATION USING ADVANCED MICROSCOPY TECHNIQUES Supervisore: prof. Alberto Morgante; dott. Danut-Adrian Cojoc Tutori (eventuali): prof. Enrico Tongiorgi Attività di ricerca Durante il terzo anno di dottorato sono state seguite tre principali attività: 1. Utilizzo della tecnologia dei liposomi, sviluppata durante il secondo anno di dottorato, al fine di analizzare l’effetto di alcune proteine sulla morfologia dei coni di crescita (GC) di neuroni ippocampali in coltura. In particolare, in collaborazione con il laboratorio del prof. Torre alla S.I.S.S.A., è stato analizzato l’effetto che un diverso numero di molecole di Netrina-1 e Semaphorin-3A hanno su filopodia e lamellipodia dei GC, nonchè sulla loro distanza dal sito di rilascio. 2. La tecnologia dei Quantum dots (QD) consente di seguire mediante microscopia a fluorescenza il movimento di singole molecole all’interno della cellula. Il nostro interesse è visualizzare il trafficking del BDNF (si vedano report I e II anno) all’interno dei neuroni a seguito dell’endocitosi, dal momento che questo processo non è stato ancora caratterizzato. Durante quest’anno è stato ottimizzato con successo il protocollo per legare covalentemente il BDNF ai QD. Successivamente i QD funzionalizzati sono stati incapsulati in liposomi e sono state dimostrate sia la possibilità di manipolazione con gli Optical tweezers che il rilascio a seguito della fotolisi del doppio strato lipidico. 3. Durante i tre mesi trascorsi presso il laboratorio del prof. Stefan Hell sono state acquisite immagini mediante la microscopia STED (STimulated Emission Depletion) al fine di caratterizzare meglio alcuni processi biologici di interesse per studi futuri di delivery localizzato di molecole. In particolare sono state acquisite immagini relative all’apparato di Golgi e alla struttura di actina e tubulina nei coni di crescita. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa), 1. D’Este E, Baj G, Beuzer P, Ferrari E, Pinato G, Tongiorgi E and Cojoc D, (2011) Integrative Biology “Use of the optical tweezers technology for long-term, focal stimulation of specific subcellular neuronal compartments”. May 3;3(5):568-77. 2. Pinato G, Lien LT, D’Este E, Torre V and Cojoc D, (2011) Journal of European Optical Society “Neuronal chemotaxis by optically manipulated liposomes”. Vol 6, 11042. 3. Pinato G, Raffaelli T, D’Este E, Tavano F and Cojoc D, (2011) Journal of Biomedical Optics “Optical delivery of liposome encapsulated chemical stimuli to neuronal cells”. Sep;16(9):095001. Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) 1.“8th IBRO world congress of Neuroscience” 14-18th July 2011, Florence. D’Este E., Baj G., Pinato G., Tongiorgi E. & Cojoc D., “Focal delivery of BDNF to cultured neurons with optical tweezers”. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 18 2. “EBSA 2011 – 9th European Biophysics Congress”23-27th August 2011, Budapest. D’Este E., Baj G., Pinato G., Tongiorgi E. & Cojoc D., “Focal delivery of BDNF to cultured neurons with optical tweezers”. 3.“8th IBRO world congress of Neuroscience” 14-18th July 2011, Florence. Pinato G., Thuy Lien L., D’Este E., Torre V. & Cojoc D., “Stimulation of neurite retraction and growth by local release of guidance molecules from lipid vesicles”. Partecipazione a congressi (come relatore) PhD School in Nanotechnology Annual Meeting 2011, 17-20 Gennaio 2011, Trieste, “Bio-sample environment manipulation using advanced microscopy techniques”. Attività formativa Periodi di permanenza all’estero (data e Sede) 24 Settembre - 24 Dicembre 2011, Max Planck Institute for Biophysical Chemistry, Department of NanoBiophotonic, laboratorio prof. Stefan Hell, Göttingen, Germania. Congressi, seminari, corsi avanzati e altre attività didattiche passive “Master in Complex Actions”, S.I.S.S.A. (200 ore); “Misure ripetute e cluster di dati con R”, 24 marzo 2011, Associazione Nazionale Biotecnologi Italiani; Bologna (8 ore); “PhD School in Nanotechnology Annual Meeting 2011”, 17-20 Gennaio 2011, Trieste (10 ore circa); “8th IBRO world congress of Neuroscience” 14-18 Luglio 2011, Firenze (30 ore); “New Approches in Cancer Therapy”, prof. Konrad Misiura, 12 Maggio, Trieste (1 ora); “School in Super Resolution Microscopy”, 26 settembre 2011, Göttingen (2 ore); “1st Super Resolution Users Club Meeting”, 30 settembre 2011, Göttingen (4 ore); “PhD CMPB Symposium”, 20 ottobre 2011, Göttingen (2 ore); “Dissecting the neural circuits that control movement”, Prof. Dr. Martyn Goulding, 24 ottobre 2011, Göttingen (1 ora); “Nobel Lecture 2011: Roger Tsien”, 27 ottobre 2011, Göttingen (1 ora). Attività didattica di supporto e attività didattica attiva Life Learning Centre Trieste, gennaio-febbraio 2011, “Guardando dentro il cervello” c/o Istituto Deledda e liceo Galilei (8 ore). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 19 DANIEL ERA Titolo della tesi: Applicazioni nanotecnologiche e farmacogenetica Supervisore: Prof. Tullio Giraldi Tutori (eventuali): Attività di ricerca Questo progetto di dottorato di ricerca è finalizzato allo studio dell'applicazione nella pratica clinica attuale della medicina di comunità, di tests farmacogenetici utili sia per la determinazione di polimorfismi noti per influenzare la dose iniziale di warfarin nella terapia anticoagulante orale, sia per l’analisi dei polimorfismi associati alla risposta di farmaci antidepressivi . Gli studi si sono perciò svolti in collaborazione con la medicina territoriale, al fuori dei centri di eccellenza e le rigorose condizioni in cui di solito vengono eseguiti i trials. In quest’ottica, i risultati finora ottenuti, in accordo con la letteratura corrente, supportano l'impiego dell’analisi dei polimorfismi per la determinazione della corretta dose iniziale di warfarin. Inoltre, il polimorfismo del trasportatore della serotonina (5-HTTLPR) è stato valutato in relazione alla risposta ai farmaci antidepressivi appartenenti alla classe degli inibitori selettivi della ricaptazione della serotonina (SSRI), e anche nella medicina di comunità, sia in pazienti oncologici che psichiatrici, l’analisi di 5-HTTLPR sembra essere uno strumento utile per predire l’esito della risposta al trattamento con SSRI. Infine, con lo sviluppo di nuove tecnologie, i costi per l'analisi genetica sono diminuiti,e possono essere considerati limitati soprattutto in relazione ai vantaggi raggiunti con il loro impiego. In ogni caso, il rapporto costo-efficacia dei test farmacogenetici potrebbe essere migliorato con lo sviluppo di ulteriori devices che permettano un’analisi più veloce ed economica. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa • Psychological response to cancer: role of 5-HTTLPR genetic polymorphism of serotonin transporter. Anticancer research 30: 3823-3826 (2010); • Pharmacogenetic of escitalopram and mental adaptation to cancer in palliative care: report of 18 cases. Tumori 97(3):358-61 (2011). Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) • • • • Role of genetic polymorphism 5-HTTLPR of seotonin transporter in psychological response to diagnosis of breast cancer. XI national congress Italian Society of Psycho-Oncology (SIPO). October 1-3, 2009, Senigallia (An). Genetics interaction between citalopram antidepressant activity and MAO-A VNTR polymorphism in palliative care of cancer. 34° national congress Italian Society of Pharmacology (SIF). October 14-17, 2009, Rimini. Ruolo del polimorfismo genetico 5-HTTLPR del trasportatore della serotonina nella risposta psicologica alla diagnosi di cancro della mammella. XVII Congresso Nazionale della Società Italiana di neuropsicofarmacologia 22-25 settembre 2010, Cagliari; XIV Seminario Nazionale per dottorandi in Farmacologia e Scienze affini. Siena, Certosa di Pontignano, 20-23 Settembre 2010. Pharmacogenetic research and its applications in current clinical practice; Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 20 • Pharmacogenetic of warfarin and its applications in the community medicine . III Monothematic Symposium SIF 2011 “Pharmacogenomics and cancer: from bench to bedside”. Grado (GO), Grand Hotel Astoria, October 8, 2011; Capitoli/sezioni di libri/volumi Collaborazione come traduttore all’edizione italiana del libro “Farmacologia medica ed elementi di terapia” edito da Elsevier. Attività formative Congressi, seminari, corsi avanzati e altre attività didattiche passive • Nanotechnology School Annual Meeting, January 2009; • • • • • • • • • • • • • • • • • Congress “Highlights in oncology. Recenti acquisizioni in oncologia”. February 11 2009, Aviano (Pn); III Meeting-Workshop “Nuove Prospettive in Chimica Farmaceutica”. February 13-14 2009, Castelvecchio Pascoli (Lu); Prof. Maurizio Fermeglia “Uso del VPN per l’accesso remoto”. March 20 2009, Trieste; Dr A. Bardelli “Cancer mutations and targeted therapies”. May 6 2009, Trieste; Prof. PR Westmoreland, Dept. of Chemical Engineering, University of Massachusetts Amherst, “Modeling reactions at the nanoparticle scale”. May 8 2009, Trieste; Dr I. Colombo “Chimica Fisica delle interfasi in sistemi nanostrutturati”. May 15 2009, Trieste; Incontri informativi per i dottorandi organizzato dalla Sezione Ricerca e Dottorati in collaborazione con il Sistema Bibliotecario di Ateneo. June 29 2009, Trieste; 34° National Congress of the Italian Society of Pharmacology “Il valore del farmaco per la tutela della salute”. October 14-17 2009, Rimini; Corso introduttivo alla farmacoepidemiologia, ASS1-ISS. November 19-21 2009, Trieste; Nanotechnology School Annual Meeting, January 2010 Dr H Mamzer, Sociology Department of Adam Mickiewicz University in Poznan (Poland), “How to present scientific results in public” January 22, 2010, Trieste. Prof. M Nobrega, University of Minho (Portugal) “Development of On-line Monitoring devices for the extrusion process”. June 15 2010, Trieste; XIV Seminario Nazionale per dottorandi in Farmacologia e Scienze affini. Siena, Certosa di Pontignano, 20-23 Settembre 2010; Dr S Kale, Defence Institute of Advanced Technology (DIAT), India. “Metal oxide nanomaterials in sensors and biomedicine”. November 23, 2010, Trieste; Nanotechnology School Annual Meeting, January 2011; Nanotechnology Summer School, September 20-23, 2011, Trieste; III Monothematic Symposium SIF 2011 “Pharmacogenomics and cancer: from bench to bedside”. Grado (GO), Grand Hotel Astoria, October 8, 2011; Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 21 RAFFAELLA FIOR Titolo della tesi: Development of BioMEMS for the study of mechanosensitive ion channels and mechanical cell properties Supervisore: prof. Orfeo Sbaizero Tutori (eventuali): - Attività di ricerca Descrizione delle tematiche di ricerca e dei principali risultati scientifici raggiunti Progettazione, caratterizzazione FEA, realizzazione dispositivi: Dispositivi per l’analisi meccanica di singole cellule Dispositivi per l’analisi meccanica di singole cellule completamente trasparenti Dispositivi per l’analisi meccanica di singole cellule combinata a AFM conduttivo, completamente trasparenti Progettazione di dispositivi per l’analisi meccanica di singole cellule combinata e planar patch clamp Test su singole cellule: Protocollo di funzionalizzazione localizzata (ODS e Pluronic grafting e lithography) Analisi morfologica e meccanica Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa), -R. Fior, S. Maggiolino, M. Lazzarino and O. Sbaizero, “A new transparent BioMEMS for uni-axial single cell stretching”, Microsystem Technologies 2011 doi:10.1007/s00542-0111325-8 Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) -R. Fior, S. Maggiolino, M. Lazzarino and O. Sbaizero, "A completely transparent MEMS for mechanical properties evaluation of a single living cell", Proc. SPIE 7929, 792906 (2011) San Francisco CA USA; doi:10.1117/12.874445 (proceedings- speaker) - R. Fior, S. Maggiolino, B. Codan and O. Sbaizero, “A study on the cellular structure during stress solicitation induced by BioMEMS”, Proc. EMBC 2011 Boston USA (proceedings -speaker) - R. Fior, S. Maggiolino, B. Codan, R. Lal, O. Sbaizero, “A new BioMEMS for the study of mechanosensitive ion channels”, Nanotechitaly 2011Venice Italy (poster) - V. Martinelli, I. Pecorari, S. Maggiolino, R. Fior, B. Codan, L. Mestroni, O. Sbaizero, “Metabolic and proliferative cells activity on different substrates”, Nanotechitaly 2011 Venice Italy (poster) - B. Codan, D. Dorigo, V. Martinelli, S. Maggiolino, R. Fior and O. Sbaizero, “Lithograpic patterned substrate with nanotips for cell indentation”, Nanotechitaly 2011 Venice Italy (poster) - I. Pecorari, B. Codan, V. Martinelli, S. Maggiolino, R. Fior and O. Sbaizero, “Mechanical properties of 3T3 fibroblasts due to fixation assessed using atomic force microscopy”, Nanotechitaly 2011 Venice Italy (poster) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 22 - V. Zammattio, I. Pecorari, B. Codan, V. Martinelli, S. Maggiolino, R. Fior and O. Sbaizero, “AFM cell morphological analysis: Influence of different environmental conditions on fixed and living cells”, Nanotechitaly 2011 Venice Italy (poster) Partecipazione a congressi (come relatore) -R. Fior, S. Maggiolino, M. Lazzarino and O. Sbaizero, "A completely transparent MEMS for mechanical properties evaluation of a single living cell", Proc. SPIE 7929, 792906 (2011) San Francisco CA USA; doi:10.1117/12.874445 - R. Fior, S. Maggiolino, B. Codan and O. Sbaizero, “A study on the cellular structure during stress solicitation induced by BioMEMS”, Proc. EMBC 2011 Boston USA Attività formativa Periodi di permanenza all’estero (data e Sede) - 5 ottobre 2010 – 3 novembre 2011 University of California San Diego, Department of Bioengineering, La Jolla CA USA Congressi: - SPIE Photonics West San Francisco 22-27 gennaio 2011 - EMBC 2011 Boston USA 30 agosto – 3 settembre 2011 - Nanotech Italy Venezia 23-25 novembre 2011 Corsi: - “Electron Beam Lithography” Nano3 UCSD San Diego, CA USA Seminari: - 28 aprile 2011 “Amyloid ion channels and neurodegenerative diseases” R. Lal, PhD UCSD, in San Diego - 6 maggio 2011 “Neuro mechanics and axonal transport: implications for peripheral nerve regenerations” S. Shah, PhD University of Maryland, in San Diego - 13 maggio 2011 “Bio-inspired Microenvironments Regulate Cell Fate” A. Engler, PhD UCSD, in San Diego - 20 maggio 2011 “Probing structural features of Alzheimer’s β amyloid ion channels in membranes using Aβ mutants” S. A. Kotler, MS UCSD, in San Diego - 24 giugno 2011 “DNA zipper based devices” A. Mo, P. Landon, PhD in San Diego - 5 ottobre 2011 “Integrated Atomic Force Microscopy Techniques for Analysis of Biomaterials: Study of Membrane Proteins” L. Connelly UCSD - 10 ottobre 2011 “Integrated cortical interfaces for analysis and control of dexterous hand movements” M. Mollazadeth, PhD Johns Hopkins University, in San Diego Attività didattica di supporto e attività didattica attiva Correlatrice tesi di laurea: Realizzazione e caratterizzazione di superfici micreostrutturate per lo studio dell’interazione cellula-substrato. (CdL Triennale in Ingegneria dei Materiali) Caratterizzazione del modulo elastico mediante AFM dell’espressione della desmina in un modello cellulare. (CdL Triennale in Ingegneria dei Materiali) Riprogettazione e realizzazione di un sistema per la stimolazione di una popolazione di cellule su membrana siliconica. (CdL Specialistica in Ingegneria dei Materiali) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 23 VALERIA LANZILOTTO Titolo della tesi: Self-assembling and charge transfer properties of thin organic films Supervisore: Prof. Alberto Morgante Tutori (eventuali): Attività di ricerca Durante il terzo anno di dottorato ho portanto avanti due differenti linee di ricerca ma entrambe focalizzate nel tentativo di capire le poprietà elettroniche e strutturali di interfacce organiche – inorganiche in una prospettiva di sviluppo di dispositivi elettronici che utilizzano sistemi organici. Il primo tipo di sistemi studiati è incentrato sull’interazione di molecole poliaromtaiche con la superficie di TiO2(110)-1x1. Le molecole usate sono: C60, pentacene, PTCDI e perilene. Per quanto riguarda il C60 e il pentacene si tratta di molecole poco interagenti con la superficie di TiO2(110)-1x1. Nonostante la poca interazione entrambe le molecole formano film perfettamente ordinati: nel caso del C60 troviamo una C(2X5) mentre nel caso del pentacene una quasi-(1x6). L’ordinamento è dovuto principalmente all’interazione intermolecolare e al matching esistente tra le dimensioni delle molecole con quelle del substrato. Il PTCDI è un derivato del perilene con due gruppi fortemente elettron attrattori ai suoi lati: il gruppo imidico (O=CNH=O). La presenza di questi gruppi rende il core perilenico un accettore elettronico in grado di interagire fortemente con la superficie di TiO2(110)-1x1. Quello che si verifica è infatti un netto trasferimento di carica dagli stati Ti 3d del subastrato verso il LUMO della molecola che essendo parzialmente riempito viene spinto al di sotto del livello di Fermi dando origine a nuovo stato (HOMO’). Nonostante questa forte interazione anche il PTCDI è in grado di creare uno strato molecolare perfettamente ordinato (1X5). Il ruolo svolto dai gruppi imidici del PTCDI è confermato dalla scarsa interazione osservata invece tra il perilene e la superficie di TiO2(110)-1x1. La seconda attività di cui mi sono occupata è stata quella di sviluppare il set-up generalmente impiegato per misurare la conducibilità di singole molecole. Il metodo, denominato Break-Junction, consiste nel portare una punta STM in contatto con una superficie d’oro su cui sono state depositate le molecole di interesse. Durante il successivo allontanamento della punta una moleocola può rimanere intrappolata nel gap esistente dopo la rottura del contatto tra punta e superficie. Applicando un bias tra punta e campione è quindi possibile misurare la conducibilità della molecola temporaneamente intrappolata. Dopo la realizzzazione del set-up ho potuto procedere con i primi esperimenti impiegando una molecola realtivamente nuova per questo tipo di misure: la tetraaza-Cu-ftalocianina. La caratteristica principale di questa molecola sono i sostituenti azotati presenti alle sue estremità. Studi recenti di conducibilità di singola molecola hanno infatti mostrato come picole molecole terminate azoto (ammine o piridine) sono in grado di fornire valori di conducibilità ben definiti. Cercando quindi di mantenere questa caratteristica all’interno della molecola ne abbiamo aumentato la complessità. Le break-junctions ottenute a temperatura ambiente non hanno mostrato valori di Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 24 conducibilità attendibili o significativi probabilmente a causa dell’elevata diffusione delle molecole sulla superficie d’oro. Lo step successivo è stato quello di ripetere le misure a bassa temperatura (55K) in modo da inibire la difusione delle molecole. In queste condizioni le tracce di conducibilità mostrano salti ripetuti compresi fra 10-3-10-4G0 con lunghezza complessiva pragonabile alle dimensioni della molecola. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa), 1. V. Lanzilotto, C. Sanchez-Sanchez, G. Bavdek, D. Cvetko, M. F. Lopez, J. A. Martin-Gago and L. Floreano “Planar growth of Pentacene on the dielectric TiO2 surface” J. Phys. Chem. C, 2011, 115 (11), pp 4664–4672 2. C. Sanchez-Sanchez, V. Lanzilotto, C. Gonzalez, A. Verdini, P. de Andrés, L. Floreano, Maria F. López and J. A. Martín-Gago "Floating molecular layer of spinning C60 molecules on TiO2(110) surfaces” in preparation 3. C. Sanchez-Sanchez, V. Lanzilotto, G. Bidau, B. Gomez-Lor, R. Perez, L. Florenao, M. F. Lopez, J. A. Martin-Gago “On-surface Dehydrogenation reactions of polycyclic aromatic hydrocarbons on Ti02(110)” in preparation Partecipazione a congressi (come relatore) 1.“Planar Growth of Pentacene on the Dieletric TiO2(110)-1X1” V. Lanzilotto, C. SànchezSànchez, G. Bavdek, J. A. Martin Gago and L. Floreano, Summer School of Nanotechnology, Università di Trieste 20-23/09/2011; (poster) Attività formativa Congressi, seminari, corsi avanzati e altre attività didattiche passive 1. Workshop of the School of Nanotechnology, University of Trieste 17-19/01/2011; 2. “Thin film metal and complex hydrides for hydrogen storage applications” by Matteo Filippi from Delft University of Technology, Elettra Synchrotron 11/04/2011; 3. “Time resolved photoelectron spectroscopy experiments on solids and interfaces at the TEMPO beamline of the SOLEIL synchrotron.” by Fausto Sirotti from SOLEIL synchrotron, Elettra Synchrotron 12/04/2011; 4. “Nanoscience at Work: Imaging and Manipulation at Atomic and Molecular Scale” by Saw-Wai Hla from Ohio University, Elettra Synchrotron 12/07/2011; 5. Summer School of Nanotechnology. Univeristy of Trieste, 20-23/09/2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 25 IMMACOLATA LUISI Titolo della tesi: Identificazione di scaffold proteici per il legame di piccole molecole Supervisore: Prof. Roberto Marzari (Università degli studi di Trieste, Dip. Scienze della Vita) Tutori: Prof. Daniele Sblattero (Università degli studi del Piemonte Orientale “Amedeo Avogadro”), Dott. Federico Berti (Università degli studi di Trieste, Dip. Scienze chimiche e farmaceutiche) Attività di ricerca Il mio progetto di ricerca è basato sull’identificazione di nuovi scaffold proteici in grado di riconoscere e di legare piccole molecole per il monitoraggio di farmaci e per la detection di piccole molecole per applicazioni future in ambito biosensoristico come nuovi scaffold molecolari. A tal fine sono state adottate diverse strategie sperimentali che prevedono un approccio duplice: i.utilizzo di molecole non naturali basate su domini coiled-coil quali il dominio sintetico E/K. Queste molecole vengono ottimizzate mediante una strategia di MUTAGENESI RANDOM. ii. utilizzo di molecole naturali quali Human Serum Albumin (HSA) ottimizzate mediante strategie di MUTAGENESI RAZIONALE. PRIMO APPROCCIO: Mutagenesi RANDOM La prima strategia prevede come oggetto di studio lo scaffold E/K coiled-coil. I domini coiled-coil appartengono al gruppo di scaffold ad α-elica: si tratta di due α-eliche destrorse che dimerizzano fra loro. Un gruppo di ricerca ha sintetizzato ex novo una nuova struttura scaffold chiamata E/K (Tripet et al. 1996; Chao et al. 1998; Litowski and Hodges 2001) che consiste in un peptide eterodimerico E e K formati da un’unica eptade ripetuta cinque volte. Sono state apportate mutazioni al peptide per creare una tasca in grado di legare al suo interno diverse molecole e isolare poi nuovi interattori molecolari con una maggiore affinità e stabilità rispetto a quelli wild type. a) E’ stata applicata una MUTAGENESI RANDOM alle due epatadi centrali dello scaffold andando a sostituire gli amminoacidi presenti con amminoacidi random. b) Il primo passo per la costruzione dello scaffold è stata la creazione di una libreria di mutanti E/K random di 2*108 cloni mutanti e la successiva verifica della diversità mediante PCR e sequenziamento dei cloni ottenuti. c) La libreria è stata selezionata mediante la tecnica del Phage-Display utilizzando due analiti di nostro interesse: Aldosterone e Caffeina. Sono stati isolati alcuni cloni che mostrano una buona affinità rispettivamente per ciascuna delle due molecole. d) Sono state effettuate una serie di analisi di natura biochimica per validare la maggiore affinità dei peptidi random selezionati, la stabilità e la struttura. SECONDO APPROCCIO: Mutagenesi RAZIONALE Durante il secondo anno di dottorato è stato preso in esame lo studio di una proteina naturale, la Siero Albumina Umana (HSA Human Serum Albumin) come recettore naturale in grado di legare alcuni farmaci e composti sia endogeni che esogeni. L’HSA è una proteina di 66KDa (585amminoacidi), costituita da 3 domini omologhi ognuno con due sottodomini. La nostra attenzione si è focalizzata sul sito I di legame dell’HSA che lega normalmente piccole molecole eterocicliche, acidi dicarbossilici e altri composti. La strategia sperimentale è stata la seguente: Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 26 a) ANALISI STRUTTURALE COMPUTAZIONALE di HSAbsI (300aa) ha permesso di ridurre questo dominio da 300aa a 100aa; la regione scelta contiene tutti gli amminoacidi a contatto con i ligandi e tutte le cisteine che formano ponti disolfuro. b) CLONAGGIO ED ESPRESSIONE DI HSA100: è stata clonata la sequenza nucleotidica all’interno di un vettore procariotico per permettere l’espressione della proteina in fusione con un tag, il GST (Glutatione S-Transferasi). Il sottodominio del sito I di legame dell’HSA è stato prodotto mediante un sistema batterico e purificato con cromatografia di affinità con resina al glutatione (GSH). L’HSA ricombinante è stata validata mediante esperimenti di carattere biologico e chimico quali: c) Test ELISA e WESTERN BLOT: hanno rivelato la corretta espressione e produzione della proteina mediante il legame con anticorpo specifico. Diverse prove sono state condotte presso il dipartimento di Scienze Chimiche per studiare l’interazione con il farmaco Warfarin ed Efavirenz. d) DINAMICHE MOLECOLARI: analisi di stabilità del frammento clonato sono risultate positive, il subdominio mantiene il folding ed ha una struttura stabile. e) ESPERIMENTI DI CINETICHE: cinetiche di addizione dell’acetone alla 6metossinaftaldeide hanno confermato l’attività aldolasica del sito I dell’HSA. f) MISURE DI FLUORESCENZA: è stato misurato il quenching di fluorescenza del triptofano presente nella proteina ricombinante in presenza di concentrazioni crescenti di entrambi i farmaci ed è risultata una buona interazione di questo subdominio con i ligandi. Sulla base degli studi del subdominio di 100 aa dell’HSAbsI, abbiamo pensato di mutare determinate posizioni importanti per l’ingresso del farmaco e poi andare a studiare eventuali miglioramenti e/o cambiamenti nell’affinità del sito per i due ligandi e comparare lo studio con le precedenti misure del sito I wild-type dell’HSA e dell’HSA intera. Le posizioni sono state scelte a partire da un allineamento di tutte le albumine di siero e da un’analisi bioinformatica di tutte le sequenze riconosciute come non essenziali per il corretto folding non. In particolare il subdominio di 100aa si può dividere in 2 subsiti che hanno il fondo idrofobico con due tasche una maggiore ed una minore ed un ingresso polare per cui sono stati presi in considerazioni i siti di ingresso e di contatto del ligando con le due tasche idrofobiche: Ala215-Leu238-Leu260-Ile264-Arg257-His242Ser287. È stata poi sviluppata una strategia per il clonaggio in vettori di espressione che parte con il disegno di oligonucleotidi sullo stampo dell’HSA100 ottimizzata per inserire le mutazioni di nostro interesse. Durante il terzo anno di dottorato è stata innanzitutto ottimizzata la sequenza di DNA del gene dell’HSA100 mantenendo invariata la sequenza amminoacidica per avere una maggiore espressione in E. coli e di conseguenza una maggiore produzione della proteina ricombinante HSA100-GST. La proteina ricombinante è stata nuovamente prodotta e dializzata con ottimi risultati: 4mg/L. Sulla base del gene ottimizzato, sono state costruite due librerie di varianti dell’HSA100 con due mutazioni Ala215-Leu238 nella tasca minore e Leu260-Ile264 al livello della tasca maggiore rispettivamente. Inizialmente abbiamo lavorato con la libreria con le due mutazioni nella tasca Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 27 maggiore Ala215-Leu238. La libreria è stata controllata mediante PCR e sequenziamento. Dall’analisi delle sequenze sono stati identificati sei cloni random con determinati amminoacidi nelle posizioni selezionate. I sei cloni sono stati testati mediante Western Blot per vedere la corretta lunghezza ed espressione dei frammenti e successivamente mediante test ELISA e analisi in BIACORE per vedere la capacità di binding tra cloni mutanti e ligandi. a) In ELISA tutti i cloni risultano legare l’EFV, in particolare tre cloni in modo migliore rispetto all’HSA100 wt. b) In BIACORE, immobilizzando l’EFV sul chip e utilizzando le proteine mutanti alla stessa concentrazione, da un’analisi preliminare dei dati sono state ottenute delle costanti di affinità migliori rispetto a quella dell’HSA100 wt. c) Mediante misure di fluorescenza del quenching del Triptofano questi risultati ottenuti in precedenza sono stati ulteriormente confermati. È risultata una maggiore sensibilità con l’Efavirenz rispetto al Warfarin infatti, con i cloni mutanti, in presenza di Efavirenz sono state ottenute delle Kd comparabili con la Kd tra HSA100-Warfarin (tipico ligando del sito primo di legame dell’HSA, usato come riferimento). Le prospettive future prevedono, dopo aver testato l’HSA100 e mutanti mediante biosensori Surface Plasmon Resonance: Utilizzo su sensori elettrochimici o su microbilance Costruzione della seconda libreria con le mutazioni nella tasca minore Ala215 e Leu238 e di una libreria con mutazioni nelle 7 specifiche posizioni prescelte dell’HSA100. Identificazione e validazione dei cloni mutanti con un’affinità migliore Applicazione del miglior clone HSA100 per monitoraggio terapeutico di farmaci. Attività formativa Congressi, seminari, corsi avanzati e altre attività didattiche passive 17-19 Gennaio 2011: Congresso annuale della scuola di dottorato in Nanotecnologie con presentazione degli studenti 24 Marzo 2011: secondo BRAINCONTRO (Basic Research And Integrative Neuroscience), Facoltà di medicina e chirurgia, Ospedale di Cattinara, Trieste 12 Maggio 2011: “Oxazaphosphorinane drugs in cancer therapy” Prof. Konrad Misiura (University Copernico of Torun – Poland) 10 Giugno 2011: “Optical imaging per applicazioni biomediche” Stefania Biffi Phd and Simeone Dal Monego, PhD, Cluster in Biomedicine (CBM Scrl) – Trieste 1 Luglio 2011: “Self assembled monolayers on gold the challenge”, Dr. HIcham Hmamoudi from the Université-Paris Sud, Facoltà di ingegneria, edificio C1, campus of Piazzale Europa 18 Luglio 2011: “The Effect of Confinement on Enzymes Diffusion and Reactions Inside DNA” Matteo Castronovo Phd, Sala degli Atti, Facoltà di ingegneria, edificio C1, Piazzale Europa 4-8 Luglio 2011: “Advances in Structural Bioinformatics”, FVG International Summer School on Bioinformatics 2011, SISSA, via Bonomea 265, Trieste, room 128/129 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 28 20-23 Settembre 2011: “First Joint Summer School on Nanotechnology” Stefano De Gironcoli SISSA, Trieste; Maurizio Fermeglia University of Treiste; Luica Selmi University of Udine. University of Trieste, Campus of Piazzale Europa 1, 34127 Trieste Building C2, AULA A. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa) An albumin-derived peptide for binding and catalysis Immacolata Luisi1, Silvia Pavan2, Giampaolo Fontanive2, Alessandro Tossi1, Fabio Benedetti2, Roberto Marzari1, Adriano Savoini3, Elisa Maurizio1, Riccardo Sgarra1, Daniele Sblattero4*, Federico Berti2* (in submitted) 1 Dipartimento di Scienze della Vita, Università di Trieste, via Weiss 2, 34128 Trieste, Italy. 2Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, via Giorgieri 1, 34127 Trieste, Italy. 3T&B Associati srl., Area Science Park, Padriciano 91, 34100, Trieste, Italy. 4Dipartimento di Scienze Mediche, Università del Piemonte Orientale “Amedeo Avogadro”, via Solaroli 17, 28100 Novara, Italy. Attività didattica di supporto e attività didattica attiva Attività di tutoraggio in laboratorio di TECNOLOGIE CELLULARI E MOLECOLARI a studenti del I anno di corso di laurea specialistica in GENOMICA FUNZIONALE. Attività di tutoraggio in laboratorio di biologia cellulare a più studenti della laurea triennale in biologia molecolare per un periodo complessivo di tre mesi ciascuno, che prevede l’apprendimento delle tecniche di laboratorio principali quali la preparazione di soluzioni e terreni di colture per crescite batteriche, preparazione di glicerolati, preparazione di cellule competenti chimiche e di cellule elettrocompetenti, trasformazione batterica, estrazione di DNA plasmidico, PCR (Polymerase Chain Reaction), elettroforesi su gel d’Agarosio. Produzione e purificazione di proteine ricombinanti, preparazione di gel di Acrilammide e Western blotting, test ELISA, PhageDISPLAY. Supporto nella stesura della tesi di laurea triennale. Correlatore in 5 lavori di tesi triennali del corso di laurea in Scienze Biologiche (curriculum Biomolecolare): - STRATEGIE DI CLONAGGIO ED ESPRESSIONE DI PICCOLI PEPTIDI LEGANTI LA MOLECOLA EFAVIRENZ - SELEZIONE DI UNA MINILIBRERIA DI SCAFFOLD PEPTIDICI CONTRO EFAVIRENZ - STUDIO DI INTERAZIONE DELLA SIERO ALBUMINA UMANA RICOMBINANTE CON PICCOLE MOLECOLE MEDIANTE SISTEMA BIACORE - SISTEMA DI PRODUZIONE EPURIFICAZIONE DELLA PROTEINA HSA RICOMBINANTE - VALUTAZIONE DI METODI DI PURIFICAZIONE DI PROTEINE RICOMBINANTI CON AFFINITY-TAG Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 29 MONICA MARINI Titolo della tesi: Evolving biosensors: intelligent devices at the nanoscale Supervisore: Giuseppe Firrao Tutori (eventuali): Marco Lazzarino Attività di ricerca In questo progetto, un DNA-origami in grado di praticare dei movimenti autonomi da parte della sua struttura è stato disegnato in silico, costruito e caratterizzato per mezzo di una combinazione di tecniche microscopiche e di fluorescenza. Le nanostrutture a DNA sono state disegnate in silico utilizzato il programma caDNAno(SQ) e, in una prima versione, è consistito in un disco connesso ad un anello esterno esclusivamente in due punti diametralmente opposti. Il metodo denominato “DNA-origami” è stato introdotto da Rothemund nel 2006, basandosi sul ripiegamento di un polinucleotide a singolo filamento chiamato 'scaffold strand' (il genoma virale di M13mp18), guidato da centinaia di oligonucleotidi più corti (in questo progetto circa 220), chiamati 'staple strands', al fine di originare forme arbitrarie e precise definite solo dalla scelta degli 'staples'. La correttezza della struttura attesa è stata verificata qualitativamente (elettroforesi standard e uso del TEM) sia quantitativamente (AFM). Una volta ottenuto l'oggetto dalla forma e dimensioni desiderate, un altro DNA a singolo filamento, l'attuatore, è stato connesso ai due margini del disco perpendicolarmente all'asse di costrizione. In presenza di un acido nucleico strutturato a forma di forcina, l'attuatore ibrida formando un doppio filamento che strattona il disco centrale fozandone le due estremità e portandole a muoversi una verso l'altra, cambiando la conformazione delle due ali. Verificata l'effettiva apertura del dispositivo per mezzo di microscopia a forza atomica e sistema a fluorescenza (FRET) usando la coppia 6'-FAM/BHQ-1, il sistema è stato reso reversibile apportando alcune modifiche alla molecola target a forcina in modo tale che quando una terza molecola a singolo filamento, il 'competitore', viene aggiunta in soluzione essa rimuove il target dall'attuatore, riportando il DNA-Origami allo stato di riposo iniziale. Una seconda versione del disco a DNA è stata ottenuta usando gli stessi principi ma ottimizzando il meccanismo di apertura per renderlo funzionale anche utilizzando target a singolo filamento. Infine la funzionalità del sistema è stata validata con campioni reali in soluzione, utilizzando RNA virali di patogeni di piante. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa) Monica Marini, Luca Piantanida, Alpan Bek, Rita Musetti, Mingdong Dong, Flemming Besenbacher, Marco Lazzarino, Giuseppe Firrao (2011) A revertible, autonomous, self-assembled DNA-origami nanoactuator. Nano Letters Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) Abstract e Presentazione di un poster dal titolo “DNA Origami for hybrid nanosensors” presso NanotechItaly 2010, autori: Marini M., Piantanide L, Bek A, Lazzarino M, Musetti R, Firrao G. Abstract e Presentazione di un poster dal titolo “DNA-based autonomous devices at the nanoscale” presso la conferenza “ Joint ICTP-KFAS Conference on Nanotechnology for Biological and Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 30 Biomedical Applications” (10-14 Ottobre 2011), ICTP (Miramare). Autori: Marini M., Piantanide L, Bek A, Lazzarino M, Musetti R, Firrao G. Altre pubblicazioni Abstract e Presentazione del poster alla Summer School presso Universitat Karlsruhe (TH), DFGCentrum fur Functionelle Nanostrukturen. Bad Herenhalb, Germania dal titolo: CFN Summer School on Nano-Biology (7 - 11 Settembre 2009) Abstract e Presentazione del poster allo spring college “Computational nanoscience”, ICTP Trieste dal titolo “DNA-Origami for hybrid nanosensors” (Maggio 2010). Autori: Marini M., Firrao G. Attività formativa Esami sostenuti, ore di lezione e di laboratorio seguite Corso: Ottobre 2009-Febbraio 2011, Università degli Studi di Udine. Di Giusto Sandro: “Fondamenti di informatica”, corso tenuto nell'ambito della facoltà di ingegneria (indirizzo meccanico). Congressi, seminari, corsi avanzati e altre attività didattiche passive Seminario: 4 Febbraio 2009. Museo di Scienze Naturali e Università degli Studi di Udine. Ian Tatterstall: “Charles Darwin and human evolution” Seminario: Aprile 2009, Università degli Studi di Trieste. AA VV. “Nanochallenge and Polymerchallenge”. Seminario: 15 Maggio 2009. Università degli Studi di Trieste. Dr. Italo Colombo “Chimica fisica delle interfasi in sistemi nanostrutturati”. Corso: Maggio 2009, ELETTRA. Maja Kiskinova: “Advanced Imaging and spectromicroscopy methods for chemical and structural characterization of micro- and nano-materials”. Seminario: 11 Giugno 2009. Area Science Park. KeyToNature Technology Transfer Day: “L'identificazione rapida di organismi: dalla ricerca alle applicazioni industriali” Seminario: 11 Giugno 2009. Università degli Studi di Udine. Robert S. Marks: “Biosensor systems in detecting patient exposure to pathogens and monitoring water toxicity: how combining biology, physics and chemistry helps gain in sensitivity and time.” Seminario: 30 Giugno 2009. Università degli Studi di Trieste. “Information meeting for doctoral students”. Corso: Giugno 2009, Università degli Studi di Trieste. Alberto Morgante, Loredana Casalis, Lucia Pasquato: “Molecular self-assembling and nanostructures”. Corso: Giugno2009 - Luglio 2009, corso presso ELETTRA. Cristina Afric, Laura Felisari: “Advanced microscopy: Scanning and Transmission Electron Microscopy, Scanning Probe Microscopy”. Summer School: 7 - 11 Settembre 2009. Universitat Karlsruhe (TH), DFG-Centrum fur Functionelle Nanostrukturen. Bad Herenhalb, Germania: CFN Summer School on Nano-Biology. Seminario: 16 Ottobre 2009. Università degli Studi di Trieste. “Writing (and managing) a research project” Presentazione attività dottorandi per il passaggio d'anno: Dicembre 2009 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 31 Congresso attività dottorandi. Università degli Studi di Trieste: Gennaio 2010 Seminario: 22 Gennaio 2010. Università degli Studi di Trieste. Dr.Hanna Mamzer “How to present scientifici results” Congresso attività dottorandi. Università degli Studi di Udine: Aprile-Maggio 2010. Seminario: 17 Maggio 2010. ELETTRA. Prof. Fleming Besenbacher “Dynamics of nanostructures: diffusion, self-assembly, self-organization, DNA dolphins and nano-boxes” Spring college: 17-28 Maggio 2010. ICTP Trieste. “Spring college on computational nanoscience” Seminario: 15 Giugno 2010: Presentazione di “Nanochallenge and Polymerchallenge”, Veneto Nanotech Seminario: 15 Giugno 2010. Università degli Studi di Trieste. Prof Miguel Nobrega, University of Minho in Portugal “Development of On-line Monitoring devices for the extrusion process”. Seminario: 15 Giugno 2010. Università degli Studi di Trieste. Prof Maurizio Fermeglia “Use of VPN and UGOV”. Seminario: 23 Novembre 2010. Università degli Studi di Trieste, Dr. Sangeeta Kale “Metal oxide nanomaterials in sensors and biomedicine” Seminario: 23 luglio 2010. Udine, Parco del Cormor. Margherita Hack “Le quattro dimensioni di Margherita Hack” Presentazione attività dottorandi per il passaggio d'anno: Dicembre 2010 Congresso attività dottorandi: Gennaio 2011 Seminario: 1 luglio 2011 Università degli Studi di Trieste, Dr. Hicham Hmamoudi (Université-Paris Sud) “Self assembled monolayers on gold the challenge”. Seminario: 18 Luglio 2011 Università degli Studi di Trieste. Dr. Matteo Castronovo “The Effect of Confinement on Enzymes Diffusion and Reactions Inside DNA Nanostructures” Conferenza: 10-14 Ottobre 2011, ICTP (Miramare). Joint ICTP-KFAS Conference on Nanotechnology for Biological and Biomedical Applications (Nano-Bio-Med) Attività didattica di supporto e attività didattica attiva Lezioni attive su miRNA e siRNA presso l'università degli studi di Udine per studenti della laurea specialistica, indirizzo biotecnologie agrarie. Attività di supporto nello svolgimento della tesi di Luca Piantanide, studente preso l'Università degli Studi di Trieste, inerente la visualizzazione di DNA Origami per mezzo di microscopia a forza atomica. Correlatrice nello svolgimento della tesi (in corso) di Fredrik Francesconi, studente presso l'Università degli Studi di Udine (Scienze e Tecnologie Agrarie), inerente lo sviluppo e la modificazione di DNA Origami e lo studio del loro comportamento in presenza di diverse molecole di DNA. Correlatrice nello svolgimento della tesi (in corso) di Andrea Paiani, studente presso l'Università degli Studi di Udine (Scienze e Tecnologie Agrarie), inerente lo sviluppo e la modificazione di DNA Origami e studio del loro comportamento in presenza di RNA. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 32 ELISA MIGLIORINI Titolo della tesi: Characterization of nanostructured substrates which control the ES Cells differentiation into neurons Supervisore: Marco Lazzarino Tutori (eventuali): Elisabetta Ruaro Attività di ricerca Descrizione delle tematiche di ricerca e dei principali risultati scientifici raggiunti: Il mio progetto di dottorato ha lo scopo studiare l’effetto di substrati nanopatternati sul differenziamento neuronale di cellule staminali embrionali. Per il guidare cellule staminali embrionali verso il differenziamento neuronale è stato utilizzato un protocollo che prevede l’induzione del differenziamento da parte di cellule stromali (SDIA). Risultati dei primi due anni di dottorato hanno portato evidenze che strutture quali nanopillars di PDMS sono in grado di accelerare il differenziamento neuronale. Nell’ultimo anno l’attenzione è stata rivolta verso il meccanismo di interazione cellula-substrato che sta alla base del fenomeno studiato. L’indagine è servita per distinguere il contributo meccanico e topografico dei substrati in PDMS sul differenziamento. Infatti i precursori neuronali seminati su strutture con più alto rapporto altezza/larghezza differenziano in neuroni con una resa maggiore. Calcolando il modulo di Young di questi substrati con spettroscopia di forze è stato possibile correlare il differenziamento con il modulo elastico apparente dei substrati. Il differenziamento neuronale infatti è inversamente proporzionale all’elasticità del substrato. L’importanza dell’effetto geometrico da solo è stato testato riproducendo le stesse strutture su un materiale simile al vetro (HSQ). Tale substrato non ha prodotto nessun incremento del differenziamento neuronale portando ad una resa paragonabile alle strutture lisce come il vetro standard. La prima conclusione che possiamo trarre da questa indagine è che la topografia da sola non ha alcun effetto sul differenziamento neuronale, mentre le caratteristiche meccaniche sembrano avere il ruolo principale su tale fenomeno. Essendo prevalentemente un effetto meccanico sono state studiate quantitativamente le forze messe in gioco tra cellule e substrato utilizzando la tecnica di Single Cell Force Spectroscopy. E’ stata verificata una più intensa e rapida adesione dei precursori neruonali sui pillar in PDMS rispetto all’adesione degli stessi su PDMS licio o sui pillar rigidi. Da questa seconda osservazione possiamo concludere che l’effetto sul differenziamento è imputabile alla formazione anticipata di complessi di adesione su substrati con modulo di Young apparente più simile a quello della matrice extracellulare neuronale. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa), Migliorini E., Grenci G., Ban J., Pozzato A., Tormen M., Lazzarino M., Torre V., Ruaro ME. Acceleration of neuronal precursors differentiation induced by substrate nanotopography. Biotech and Bioeng 2011 Nov; 108,11:2736-2746 Migliorini E., Ban J., Di Foggia V., Ruaro ME., Torre V., Lazzarino M. Nanoscale live imaging. Imaging & Microscopy. 2011 May; 25-28 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 33 Ban J*, Migliorini E*, Di Foggia V, Lazzarino M, Ruaro ME, Torre V. Fragmentation as a mechanism for growth cone pruning and degeneration. Stem Cells Dev. 2010 Sep 13. 20(6):1031-41 Lasalvia M, Perna G, Mezzenga E, Migliorini E , Lazzarino M, L’Abbate N and Capozzi V. Atomic force microscopy investigation of morphological changes in living keratinocytes treated with HgCl2 at not cytotoxic doses. J. of Microscopy. 2010 [Epub ahead of print] Migliorini E., Ban J., Di Foggia V., Ruaro ME., Torre V., Pozzato A., Grenci G., Tormen M, Lazzarino M. Effect of nanopatterned substrates on growth cones activity. Eur Biophys .J. 2009 Oct, (suppl 1) S89 Kondra S, Laishram J., J. Ban J.,Migliorini E., Di Foggia V., Lazzarino M., Torre V., Ruaro M.E. Integration of Confocal and Atomic Force Microscopy. Journal of Neuroscience methods. 2009 Feb 15;177(1):94-107. Epub 2008 Oct 18. Laishram J., Kondra S., Avossa D., Migliorini E., Lazzarino M., Torre V. A morphological analysis of growth cones of DRG neurons combining Atomic Force and Confocal Microscopy. Journal of Structural Biology. 2009 Sept. Partecipazione a congressi (come relatore) “Acceleration neuronal precursors differentiation induced by substrate nanotopography”. EBSA 2011. Budapest, Hungary. Oral presentation “Effect of nanopatterned substrates on Embryonic Stem Cells differentiation into neuronal lineage”. TERMIS-EU 2011. Granada, Spain. Oral presentation “Effect of PDMS nanopatterned substrates on Embryonic Stem Cells differentiation into neuronal lineage”. BIOPHYSICAL SOCIETY 55TH annual meeting 2011, Baltimore Maryland, USA. Poster presentation “Effect of PDMS nanopatterned substrates on Embryonic Stem Cells differentiation into neuronal lineage”. SLONANO 2010, 20-22 October Ljubljana, Slovenia. Oral presentation “Effect of nanopatterned substrates on ES-differentiation into neurons”. NeuroIITscience, 14-15 june 2010, Genova. Poster presentation “AFM live imaging of neuronal growth cones reveals a new nanometrical morphology”. SLONANO 2009, 19-21 October Ljubljana, Slovenia. Oral presentation “AFM live imaging to analyze neuronal differentiation on nanopatterns” First Interim meeting Nanoscale project. 23 Sept. 2009, Paris France. Oral presentation. “AFM live imaging of ES-derived neurons and growth cones retraction at the nanoscale”. European Biophysics Congress EBSA: 11-15 July 2009. Genoa – Italy. Poster presentation Attività formativa Ore di lezione seguite (data, corso, docente, tipo di corso di laurea): “Structural biology”, 02/2009 (24h). Docente: Silvia Onesti presso SISSA (dottorato in biofisica) “Advanced imaging and spectromicroscopy”, 04/2009 (15h). Docente: Maya Kiskinova presso Scuola di dottorato di Nanotecnologie “Optofluidic school”, 06/2009 (40h). Coordinatore Dan Cojoc presso ICTP (summer school) “SEM”, 04/2009 (4h). Docente: Laura Felisari presso laboratorio TASC Ore di laboratorio seguite: IOM-CNR laboratorio TASC dal 01/2009 (>60 ore). Tutor: Marco Lazzarino. Attività: nano-microfabricazione CBM dal 01/2009 (>60 ore). Tutor: Marco Lazzarino. Attività: AFM SISSA dal 01/2009 (>60 ore). Tutor: Elisabetta Ruaro. Attività: colture cellulari e saggi di immunofluorescenza. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 34 Congressi: Nanotechnology meets clinical medicine 2011. 6-8/10/11. Udine, Italy (20 ore) EBSA 23-27/08/2011. Budapest, Hungary (40 ore). TERMIS-EU 7-10/06/2011. Granada, Spain. (36 ore) BIOPHYSICAL SOCIETY 55TH annual meeting 5-9/03/2011, Baltimore Maryland, USA. (43 ore) JPK user training session (Berlin) 02-03/11/10 (18 ore). IOM workshop (Trieste). 30/09-01/10/10 (10 ore). SLONANO 2010 (Lubljana). 20-22/10/10 (24 ore). NeuroIITscience (Genova). 06-07/05/10 (16 ore). First interim meeting Nanoscale Project (Parigi). 23/09/2009 (8ore). Slonano (Lubljana). 19-21/10/09 (20 ore). How to write (and manage) a research project. 16/10/2009 (4ore). EBSA Genova 2009. 11-15/07/09 (35ore). Seminari: High-resolution scanning X-ray diffraction microscopy. 22/01/2009. Pierre Thibault X-ray microscopy: dealing with real-life complexities. 22/01/2009. Chris Jacobsen Neuronal plasticity 08/04/2009 Prof. Francois Anserment & Prof. Pierre Magistretti Modeling reactions at the nanoparticle scale 08/05/2009. Phillip R. Westmoreland Calcium control of gene regulation in an in-vitro model of neuronal plasticity 15/06/2009. Giulietta Pinato How is Enzymatic Activity Determined by Protein Dynamics? 20/07/2009. Kerstin Blank Inhibition of scrapie prion replication by polyelectrolyte nanogold particles & Coated Nanogold and the Brain. 22/07/2009. Fernanda Sousa Dopaminet summer school (CBM) 5-6/10/09. Stefano Gustincich Potential therapeutic use of neural stem cells for neurodegenerative disorders 15/3/10. Zaal Kokaia Mechanical properties of C-cadherin and its dependence on calcium binding 15/4/10. Aleandro Valbuena Combining Atomic Force Microscopy with Micro-Electrode Arrays for Studying the Mechano-Electrical Behavior of Cardiac Myocytes. 10/5/10. Josè F. Saenz Metal oxide nanomaterials in sensors and biomedicine. 23/11/10. Sangeeta Kale PPE-PPV Based Materials: Tuning of Optoelectronic Properties Using Alkoxy Side Chains. 29-06-11. Dr. Daniel Ayuk Mbi Egbe Adult stem cells and thermo-responsive polymers for cardiac muscle tissue engineering. 15/9/11. Dr. Giancarlo Forte Nano-electro-mechanical-systems for Healthcare & Environmental Applications. 12/10/11. V. Ramgopal Rao. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 35 SEID-HOSSEIN PAKDAST Title of the thesis: Triple Coupled Cantilever (TCC) systems. Supervisor: Marco Lazzarino Research Activity The final year of my PhD project has been focused on three main topics. The first part of the project was to fabricate the new design of TCC. The previous fabrication process resulted often with a misalignment of TCC with the membrane. The fabrication was done on both sides of sample in two separated steps. With the new design the misalignment is avoided and the device is fabricated on one side of the sample. The second part of the project was to develop an alternative actuation method to measure the frequency response of TCC. Earlier, we used frequency-modulated pulsed laser but this approach is not suitable for further integration. With the new design of TCC we are able to actuate the cantilevers by applying RF-signals to the electrodes. This actuation method was introduced by Eva M. Weig et al. and published in nature in 2009. The final goal of the project is the development of a full micro mechanical transistor using TCC. In a transistor a high power signal is controlled by a low power signal, thus obtaining amplification. In a Field Effect Transistor (FET), at VSD (the input voltage) constant, the output current ISD is controlled by the Gate Voltage,VG. Since IG is negligible, the FET acts as an amplifier. In our device an oscillating bias VRF applied to one cantilever is used to put the three cantilevers in oscillation. A second cantilever is exposed to a DC bias that damps the cantilever motion, which is detected on the third cantilever. So, the oscillation amplitude of the TCC is controlled by the DC signal, which, having no RF components is a low power signal, while both excitation and oscillation are RF signal and thus high power signal. Therefore we obtain an amplification effect. Proof of principle investigations were performed and suggest that the device proposed is working as expected. Publications on scientific journals (printed or in press) H. Pakdast and M. Lazzarino Triple Coupled Cantilever Systems for Mass Detection and Localization. Sensors & Actuators: A. Physical, accepted for publication. Publications/abstracts in conferences/congresses (national or international) Nanotechnology Summer School, September 20 – 23, 2011, Trieste, Italy Poster presentation NANOTECHNOLOGY MEETS CLINICAL MEDICIN, 6.-8. October 2011, Italy Joint ICTP-KFAS Conference on Nanotechnology for Biological and Biomedical Applications (Nano-Bio-Med), 10.-14. October 2011, Trieste, Italy Educational Activity Support educational activity and teaching Guiding one visiting scientist Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 36 GIACOMO SCIUTO Titolo della tesi: Innovative LHTS Elements Design and Nanotechnologies Supervisore: Prof. Roberto Muscia Attività di ricerca Gli obiettivi di questo progetto di dottorato sono lo studio e lo sviluppo di sistemi e dispositivi per l’accumulo di energia termica che sfruttino materiali a cambio fase (PCM) e l’indagine sull’eventuale compatibilità di questi con materiali nano-metrici, utilizzabili per variarne le proprietà termo fisiche. Nel terzo anno di attività è stata portata a termine la progettazione di un puffer domestico (attività iniziata nel II anno di dottorato), che sfrutta la tecnologia PCM, in grado di ridurre il ciclo di accensione/spegnimento di una caldaia a biomassa ad esso collegata. Sono stati effettuati una serie di studi di fattibilità ed ottimizzazione per l’uso dei PCM all’interno di cemento ed asfalto per ridurre la formazione di ghiaccio sulla superficie di strade e marciapiedi nel periodo invernale, basandosi su studi 2D (e 1D - attività iniziata e “conclusa” nel 1 anno di dottorato) e, simulando le condizioni climatiche con i dati meteorologici forniti dall’OSMER FVG. Si sono individuati i margini operativi di tale tecnologia ottimizzando la scelta del materiale per l’accumulo, forma e posizionamento degli accumulatori all’interno del manto stradale. Si è quindi studiato l’effetto dell’aggiunta di SWCNT in diverse quantità su alcune paraffine commerciali prodotte da Rubitherm Gmbh con temperature di fusione (27-58-65-82°C). E’ stato definita una procedura di preparazione dei campioni e sono state misurate alcune proprietà termo fisiche (calore latente di fusione/solidificazione, viscosità, capacità termica) dei campioni puri e dopati. Sono state individuate alcune sostanziali differenze tra la misura del calore latente teorico e misurato nei campioni “dopati” ed una sostanziale influenza della procedura di preparazione delle miscele sulle caratteristiche della miscela finale. Devono essere ancora portate a termine le seguenti prove: prova FTIR e prove al viscosimetro delle miscele e dei materiali puri. Attività formativa Congressi, seminari, corsi avanzati e altre attività didattiche passive PhD Final Conference 2010 – 17-19 Gennaio 2011 – Università di Trieste Comsol Conference 2011 – 27 Gennaio 2011 Matlab Conference – 17 Febbraio 2011 29 Luglio 2011 – M. Castronovo Master in Complex Actions @ SISSA Gennaio-Settembre 2011 Seminari vari Imprenderò 2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 37 FEDERICA TAVANO Titolo della tesi: Cell mobility and metastatic spreading: a study on human neoplastic cells using Optical Tweezer Supervisore: Dott.ssa Serena Bonin Tutore: Dott. Dan Cojoc, Prof. Giorgio Stanta Attività di ricerca Negli ultimi anni un’ ampia varietà di tecniche sperimentali in biofisica sono state utilizzate per studiare le proprietà meccaniche delle cellule. E’ ormai generalmente accettato che la biomeccanica delle cellule gioca un ruolo essenziale nell’insorgenza e nella progressione del tumore. Caratterizzare le proprietà meccaniche delle cellule in associazione con la membrana plasmatica e l’organizzazione del citoscheletro è importante per una miglior comprensione dei meccanismi di migrazione cellulare e offre un enorme potenziale per ulteriori passi avanti a livello diagnostico e terapeutico. Abbiamo utilizzato Custome made Optical Tweezer set up, progettato e costruito durante il primo anno di dottorato per esperimenti di ”membrane tether extraction” che rappresentano il metodo più accurato per caratterizzare quantitativamente le proprietà viscoelastiche locali della membrana plasmatica. In questo studio abbiamo analizzato le proprietà viscoelastiche delle membrane cellulari di tre diversi tipi di breast cell lines: MDA-MB-231, MCF-7 e HBL100, caratterizzate da diverso potenziale metastatico che rappresentano quindi un buon modello di studio della progressione di cellule epiteliali umane attraverso il processo metastatico. Bassi valori di membrane tether stiffnes (ovvero la compliance del membrane tether) e la membrane bending rigidity (ovvero il contributo della tensione della membrana, legata alla deformazione locale della cellula durante il tether pulling) caratterizzano le cellule con un più alto potenziale metastatico, suggerendo quindi una correlazione tra la diminuzione di questi due parametri e la progressione metastatica. Al contrario la viscosità ha mostrato una tendenza inversa: l’aumento della viscosità sembra essere associato a cellule con un maggiore potenziale metastatico. Abbiamo analizzato le stesse tre linee cellulari mediante indentation experiments con AFM (Atomic Force Microscope) per ricavare i valori del Modulo di Young delle cellule in modo da avere una caratterizzazione più approfondita delle loro proprietà meccaniche. Il modulo di Young delle cellule non neoplastiche sembra essere significativamente più basso di quello misurato nelle cellule tumorali. Dalle immagini ottenute con Immunofluorescenza si osserva nelle cellule con più alto potenziale metastatico una maggior disorganizzazione del citoscheletro e la presenza di grossi accumuli di actina, avvalorando la teoria per la quale una progressiva disregolazione della struttura del citoscheletro di actina è una delle cause principali delle alterazioni a livello delle proprietà biomeccaniche. Dalle prime analisi per la caratterizzazione lipidica delle membrane cellulari mediante MALDI Mass Spectroscopy emergono differenze significative anche a livello di alcune classi di Phosphatidyl Enositols (PE) e Phosphatidyl Inositols (PI): le cellule a più alto potenziale metastatico sembrano essere più ricche di grassi insaturi. Questo suggerisce che le proprietà meccaniche potrebbero essere influenzate non solo da alterazioni del citoscheletro ma anche da una diversa composizione lipidica delle membrane cellulari, e che quindi entrambe dovranno essere studiate in modo approfondito. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 38 Pubblicazioni su riviste scientifiche (pubblicate o accettate per la pubblicazione) Tavano F., Bonin S., Pinato G., Stanta G. and Cojoc D., Custom-built optical tweezers for locally probing the viscoelastic properties of cancer cells. International Journal of Optomechatronics September 2011 Pinato G., Raffaelli T., D’Este E., Tavano F. , Cojoc D., Optical Delivery of liposome encapsulated chemical stimuli to neuronal cells, International Journal of Biomechanical Optics 16 (9) September 2011 Capitoli/sezioni di libri/volumi Bonin S., Tavano F. Restoration and Reconstruction of DNA Length , Guidelines for Molecular Analysis in Archive Tissues Springer-Verlag 2011 Giorgio Stanta Editor Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) 53rd Symposium of the Society for Histochemistry -Current Role of Histochemistry in Preclinical and Clinical Research, 12-15 October 2011, Munich, Germany (poster) Poster Presentation:"Cell mobility and metastatic spreading: a study on human breast cancer cells using the nano-mechanical approach" Tavano F, StantaG., CojocC., PinatoG., MiglioriniE., D’Este E., BoninS. 2nd Physics of Cancer Symposium - Leipzig 13-15 October 2011 Poster Presentation: Local membrane mechanical probing of neoplastic and non-neoplastic human cells Tavano F., Bonin S., D'Este E., Pinato G., Stanta G., Cojoc D. 8th European Biophysics Congress (EBSA) - Budapest 23-27 August 2011 Poster Presentation: Cell mobility and metastatic spreading: a study on human neoplastic cells using Optical Tweezers” F.Tavano, S.Bonin, E.D’Este, G.Pinato, G.Stanta, D.Cojoc Pezcoller Foundation Symposium : Engineering In Cancer Research 16th -18th June 2011Trento-Italy Poster presentation: “Cell mobility and metastatic spreading: a study on human neoplastic cells using Optical Tweezers” ” F.Tavano, S.Bonin, E.D’Este, G.Pinato, G.Stanta, D.Cojoc Attività formativa Periodi di permanenza all’estero (15 settembre 2011-15 dicembre 2011, Leipzig, Germany) Attuamente mi trovo a Lipsia per un periodo di tre mesi nel Soft Matter Physics Group del Prof. Josef Käs al Dipartimento di Fisica dell’Università di Lipsia. Sto imparando ad utilizzare la tecnica dell’Optica Stretcher per approfondire la caratterizzazione delle proprietà meccaniche delle cellule precedentemente analizzate con l’Optical Tweezers al laboratorio TASC-IOM. Congressi, seminari ed incontri organizzati dalla scuola 1. Congresso scuola di dottorato in Nanotecnologie gennaio 2011 (9 ore) 2Seminario, “Self assembled monolayers on gold the challenge” dr Hlcham Hmamoudi (universitè –Paris Sud) giugno 2011 3Seminario Matteo Castronovo The effect of Confinement on Enzymes Diffusion and reactions inside DNA nanostructures 29 luglio 2011 4. Seminario: New approaches in cancer therapy Prof. Konrad Misiura 12 maggio 2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 39 CHIARA ZANUSSO Titolo della tesi: “Nanotecnologie e oncologia: farmacocinetica e farmacogenomica per ottimizzare le terapie antitumorali” Supervisore: prof. Tullio Giraldi Tutori (eventuali): dr. Giuseppe Toffoli Attività di ricerca Lo scopo di questo studio è verificare l’incidenza di alcune varianti genetiche (polimorfismi) coinvolte nei processi di cancerogenesi e nella progressione neoplastica. Il cancro prostatico è la terza causa di morte negli uomini ed è un problema sanitario di rilevanza mondiale. I tassi di incidenza e mortalità del tumore della prostata variano sostanzialmente in tutto il mondo: di notevole importanza…i fattori di rischio ambientali, lo stile di vita e, probabilmente, la loro combinazione con le varianti genetiche attraverso popolazioni di etnie e razze differenti. Le caratteristiche genetiche del paziente sono uno dei fattori determinanti nella variazione interindividuale osservata nell’insorgenza del tumore e nell’outcome della terapia anti-tumorale. La farmacogenetica si propone quindi di validare ed utilizzare nella pratica clinica alcuni marcatori genetici al fine di personalizzare e ottimizzare la terapia. Per prima cosa è stata effettuata una ricerca bibliografica per definire i polimorfismi genetici di possibile significato prognostico/predittivo. Sono stati identificati polimorfismi a carico delle Glutatione S-Transferasi (GST), trasportatori trans-cellulari (ATP-Binding Cassette) responsabili dell’estrusione del farmaco dalla cellula, e polimorfismi a carico di geni del riparo del DNA. Sono stati arruolati 917 pts affetti da carcinoma prostatico provenienti dal CRO di Aviano ed una popolazione di donatori di sangue sani della regione Friuli Venezia Giulia. Le metodiche di analisi utilizzate per la valutazione dei polimorfismi presi in esame si basano sull’amplificazione della porzione del gene di interesse mediante tecnica PCR e successiva analisi con metodo TaqMan, che si basa su una misurazione quali-quantitativa diretta del DNA amplificato mediante una sonda fluorescente, o con la tecnologia del Pyrosequencing, una nanotecnologia di recente sviluppo che permette di identificare mutazioni di tipo puntiforme (SNP) in modo molto semplice e veloce. Infine è stata effettuata un’analisi statistica dei dati mediante il Fisher’s Exact test, sono stati calcolati odds ratios (OR) e il corrispondente intervallo di confidenza al 95% (95% CI) per valutare il rischio relativo di sviluppare il carcinoma prostatico. Obbiettivi da raggiungere per l’anno successivo (se applicabile) Studio dei determinanti farmacoradiogenetici della tossicità e risposta al trattamento chemioradioterapico nel carcinoma della prostata; Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) 1. “FARMACOGENETICA DELLA CARDIOTOSSICITÀ DA ANTRACICLINE” Chiara Zanusso e Giuseppe Toffoli, (longabstract per il convegno dal titolo “Complicanze cardiovascolari in oncologia: ieri ed oggi. La gestione delle problematiche” svoltosi a Napoli in data 25-26 marzo 2009) 2. “NANOTECHNOLOGIES AND ONCOLOGY: PHARMACOKINETICS AND PHARMACOGENOMICS TO OPTIMIZE THE ANTITUMOR THERAPIES” Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 40 Chiara Zanusso, Erika Cecchin, Paola Biason, Elena De Mattia, Franca Sartor and Giuseppe Toffoli (Poster presentato al 2nd Phd workshop 10th/11 September 2009 presso Wittenberg) (Abstract presentato al “Congresso Nazionale della Società Italiana di Chemioterapia” svoltosi a Udine in data 14 ottobre 2009 Attività formativa Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) 700 ore di studio e approfondimento degli argomenti trattati mediante libri e review di tipo cartaceo e/o elettronico dal 1 gennaio 2010. 700 ore di laboratorio presso la “Farmacologia Sperimentale e Clinica” del CRO di Aviano diretta dal dr. Giuseppe Toffoli dal 1 gennaio 2010. Congressi, seminari, corsi avanzati e altre attività didattiche passive “Nanotechnology School Annual Meeting 2010” svoltosi in data 18, 19 e 20 gennaio 2010 dalle ore 14-17, 9-17, 9-13 presso l’Università degli Studi di Trieste. Seminar on 'How to present scientific results' dr. Hanna Mamzer svoltosi in data 22 gennaio 2010 dalle ore 10 alle ore 17 presso l’Università degli Studi di Trieste “Presentation of Nanochallenge and Polymerchallenge by Veneto Nanotech” svoltosi in data 15 giugno 2010 dalle 14.00 alle 14.30 “Development of On-line Monitoring devices for the extrusion process” (prof. Miguel Nobrega of the University of Minho in Portugal) svoltosi in data 15 giugno 2010 dalle 14.30 alle 15.00 “Use of VPN and UGOV” (prof. Maurizio Fermeglia) svoltosi in data 15 giugno 2010 dalle 15.00 alle 16.30 Seminari: “Bone marrow modelling: new insights regulation of hemopoiesis” svoltosi in data 13 gennaio 2010 dalle ore 15 alle ore 16 “Young investigators event: la due-giorni dei giovani ricercatori dell’IRCCS CRO” svoltosi in data 10 e 11 marzo 2010 dalle ore 14.30 alle ore 18.00 “Targeting tyrosine kinase receptors in solid tumors: the lesson of GISTs” svoltosi in data 12 marzo alle ore 15.00 “Connecting the Dots between Tumor Cell Metabolism and Statins as Anti-Cancer Agents” svoltosi in data 3 maggio 2010 dalle 14.30 alle 15.30 “Recenti progressi in nanomedicina clinica visti da una prospettiva chimico-fisica” svoltosi in data 8 giugno dalle 15.00 alle 16.30 “Mechanisms controlling the integrity of replicating chromosomes” (dr. Foiani) svoltosi in data 11 giugno dalle 10.00 alle 11.00 “Strutturare un protocollo di ricerca” (dr. Foiani) svoltosi in data 11 giugno dalle 11.00 alle 12.30 “Multidisciplinarità in UroOncologia” svoltosi in data 10 settembre 2010 dalle 09.30 alle 19.00 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 41 “The future of technologies (an overview on research technology)” svoltosi in data 6 ottobre 2010 dalle 16.00 alle 17.00 “Infertilità, gravidanza e tumori” svoltosi in data 20 ottobre 2010 dalle 14.30 alle 19.00 “Seminari in Oncologia: diagnostica, clinica e ricerca” svoltosi in data 21 ottobre dalle 15.00 alle 17.00, 4 novembre dalle 15.00 alle 17.45, 11 novembre dalle 15.00 alle 17.30, 18 novembre dalle 15.00 alle 16.15 e 25 novembre dalle 15.00 alle 16.30. “Incontri finalizzati all’esposizione e alla discussione dei progressi ottenuti nell’ambito dei progetti di ricerca della SOC di FSC” svoltosi nel seguente periodo dal 01/01/2009 al 31 dicembre 2009 dalle ore 13.15 alle 14.45 Corsi: “L'operatore sanitario e la comunicazione in sanità: Power Point come strumento informatico per presentazioni efficaci” svoltosi in data 3 e 9 febbraio 2010 dalle 15.00 alle 18.00 “Corso di inglese scientifico livello avanzato” svoltosi in data 6-13-20-27 maggio, 3-10-17-24 giugno, 30 settembre, 7-14-21-28 ottobre, 4-11 novembre 2010. 30 ore di lezione “L’operatore sanitario e la gestione dei dati alfa-numerici: Excel come strumento per elaborare e visualizzare efficacemente le informazioni” Svoltosi in data 24 novembre, 1 e 7 dicembre 2010 dalle ore 15.30 alle ore 17.30. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 42 Dottorandi del 25 ciclo: • STEFANO AMBROSINI Titolo della tesi: Сrescita e caratterizzazione di nanostrutture (anche) con luce di sincrotrone Supervisore: Silvia Rubini Attività di ricerca Messa a punto e perfezionamento del protocollo di crescita vapore-liquido-solido di nanofili autocatalizzati di GaAs su substrato di GaAs/silicio ossidato. Messa a punto e perfezionamento del protocollo vapore-solido per nanofili di GaAs su substrati di GaAs/silicio ossidato. Comprensione delle dinamiche cristalline all’interfaccia di crescita in funzione delle condizioni locali (flusso netto di atomi alla cima del nanofilo). Definizione di protocolli per interrompere la crescita di nanofili, da riprendersi in un secondo momento eventualmente ex situ mediante cappaggio con As amorfo. Studio, realizzazione e caratterizzazione (fotoluminescenza, microscopia elettronica in trasmissione) di eterostrutture In(Ga)As/GaAs in nanofili auto e non catalizzati. Apprendimento e studio di microscopia elettronica in trasmissione. Comprensione e studio degli effetti del riscaldamento post crescita sulla struttura cristallina di fili Au catalizzati di GaAs all’interno ed esterno della colonna del microscopio. Messa a punto di un protocollo per la comprensione in situ della struttura cristallina delle nanofili in crescita per mezzo della riflessione della diffrazione di elettroni ad alta energia RHEED. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa), - F Martelli, M Piccin, G Bais , F Jabeen, S Ambrosini, S Rubini and A Franciosi Nanotechnology 18 (2007) 125603 (4pp) - S. Ambrosini, M. Fanetti, V. Grillo, A. Franciosi and S. Rubini, Journal of Applied Physics 109, 094306 (2011) - S. Ambrosini, M. Fanetti, V. Grillo, A. Franciosi and S. Rubini, AIP ADVANCES 1, 042142 (2011) Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) - Self catalyzed GaAs nanowires on GaAs (100): growth and characterization, S. Ambrosini, M. Fanetti, V. Grillo and S. Rubini, New Trends in Nanotechnology, Braga (Portugal) 09/10 - Self catalyzed GaAs nanowires on Si-treated epiready (100) GaAs wafers by MBE, S. Ambrosini, M. Fanetti, V. Grillo, A. Franciosi and S. Rubini, III-V Nanowire workshop, Bad Honnef (Germany), 02/2011 Partecipazione a congressi (come relatore) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 43 - In situ transmission electron microscopy analyses of thermally an- nealed self catalyzed GaAs nanowires grown by molecular beam epitaxy, S. Ambrosini, J. B. Wagner, T. Booth, A. Savenko,G. Fragiacomo, P. Boggild and S. Rubini, Nano2011, Yekaterinburg, 06/11 Attività formativa Periodi di permanenza all’estero (data e Sede) 24/01/11 – 24/05/11: DTU Copenhagen, DK 19/06/11 – 01/07/11: Yekaterinburg, Russia Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) 02/02/11 – 05/05/11, Transmission Electron Microscopy, Marco Beleggia, Ph.D student class, DTU CEN, Copenhagen (DK) Attività didattica di supporto e attività didattica attiva Atomic Force Microscopy, a student MS in naotecnologie, DTU Nanotech, Copenhagen (DK) con Zachary Davis, professore ordinario al DTU Nanotech, Copenhagen (DK). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 44 SILVIA BIDOGGIA Titolo della tesi: Gold nanoparticles as carriers for drug delivery applications. Supervisore: L. Pasquato Tutori (eventuali): / Attività di ricerca L’obiettivo del mio progetto di ricerca è la progettazione, sintesi e caratterizzazione di nanoparticelle di oro ricoperte da un monostrato organico con grado di complessità, e quindi di funzionalità, innovativi da utilizzare in ambito biomedico per il trasporto e rilascio di biomolecole e/o composti biologicamente attivi. A tale scopo nell’arco di questo secondo anno è stata ottimizzata la sintesi del tiolo 12-mercapto-dodecanesolfonate acid (MDDS) che, grazie al gruppo solfonato, oltre ad impartire solubilità in acqua alle nanoparticelle favorisce complessazione di biomolecole mediante interazioni elettrostatiche. Sono state sintetizzate e caratterizzate nanoparticelle ricoperte da tale tiolo e da una miscela di MDDS e un tiolo perfluorurato commerciale (3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-1-octanethiol) in rapporti differenti. Questi campioni di nanoparticelle verranno caratterizzati nel corso del terzo anno e si andrà ad investigare quale sia l’organizzazione del monostrato mediante tecniche ESR, STM e con simulazioni multiscala. Comprendere l’organizzazione del monostrato, infatti, è un aspetto chiave in quanto esistono evidenze del fatto che solo nanoparticelle con pattern a strisce sono in grado di passare la barriera cellulare senza arrecare danno. È stata messa a punto anche la sintesi di altri tioli con funzionalità tale da rendere le nanoparticelle solubili in acqua, quali l’acido-12mercaptododecanoico e il 12-mercaptotrimetilammonio-dodecano. Ciascuno di questi tioli è stato utilizzato per la sintesi di nanoparticelle con monostrato misto con rapporto 1 : 2 tiolo perfluorurato : tiolo idrogenato e la caratterizzazione completa di questi campioni è ora in corso. Nell’arco di quest’anno inoltre, in collaborazione con il gruppo del professor Fermeglia e della professoressa Pricl, è stato messo a punto un metodo innovativo per la simulazione molecolare di nanoparticelle ricoperte da monostrato misto composto da miscele di tioli idrogenati e fluorurati. Questi studi hanno permesso di confermare la formazione di domini a isole all’interno del monostrato in accordo con precedenti esperimenti ESR e in nessun caso sono presenti distribuzioni casuali. È stato dimostrato che la forma e le dimensioni di questi domini variano dipendentemente dal rapporto tra i due tioli presenti nel monostrato e dalla loro lunghezza. In particolare nanoparticelle miste con rapporto 1:1 tra tiolo idrogenato e perfluorurato presentano un organizzazione a stripes su NP con diametro > di 1.9 nm mentre per rapporti inferiori o uguali a 4 : 1 si formano domini a isola. Più recentemente si sono sintetizzate e caratterizzate MPCs-F8-PEG e si è introdotto nel monostrato un tiolo fluorescente allo scopo di valutare mediante esperimenti di risonanza magnetica di 19F la possibilità di impiegare nanoparticelle perfluorurate come agenti di contrasto per imaging in vitro e in vivo e contestualmente usare il microscopio elettronico per identificare le aree in cui si ha accumulo di NP. Obbiettivi da raggiungere per l’anno successivo Individuare la sintesi più semplice ed efficace per ottenere NP con monostrato idrogenato/fluorurato solubili in acqua. Completare la caratterizzazione delle nanoparticelle con monostrato misto idrogenato/perfluorurato. Studiare l’organizzazione del monostrato misto mediante tecniche ESR ed STM e in silico. Studio mediante microscopia elettronica del impiego di NP fluorurate per imaging in vitro e in vivo su sistemi modello. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa): / Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 45 C. Gentilini, A. Pace, S. Bidoggia, P. Posocco, P. Franchi, M. Lucarini, S. Pricl and L. Pasquato “Self-organization of mixtures of fluorocarbon- and hydrocarbon amphiplic thiolates on the surface of gold nanoparticles: a combined experimental and multiscale molecular modeling study” Manuscript in preparation. Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) S. Bidoggia; L. Pasquato; “European Winter School on Physical Organic Chemistry”; Presentazione poster dal titolo: “Perfluorinated monolayer-protected Au nanoparticles for membrane permeation”; Bressanone, Italia, 30 gennaio-4 febbraio 2011. S. Bidoggia, P. Posocco, M. Fermeglia, S. Pricl, and L. Pasquato; “Summer School on Nanotechnology”; Presentazione poster dal titolo: “Control of the morphology of mixed monolayers protecting gold nanoparticles using perfluoro ligands”; Trieste, 20-23 settembre 2011. Attività formativa Congressi, seminari, corsi avanzati e altre attività didattiche passive “Congresso annuale della scuola di dottorato in nanotecnologie”; Università degli Studi di Trieste, 17-19 gennaio 2011. “European Winter School on Physical Organic Chemistry”; Bressanone, 30 gennaio - 4 febbraio 2011. Prof. Maurizio Prato dell’Università degli Studi di Trieste; seminario: ”Biomaterials and Nanomedicine”; Savoia Excelsior Palace, Trieste, 30 marzo 2011. Prof. János Kristóf e Prof. Erzsébet Horváth of the University of Pannonia, Institute of Environmental Engineering in Hungary; seminario: “Synthesis and structure elucidation of kaolinite organo-complexes”; Università degli studi di Trieste, 3 maggio 2011. Prof. Maurizio Fermeglia; seminario “Use of VPN and U-GOV”; Università degli Studi di Trieste, 3 maggio 2011. Dr. Hicham Hamoudi of the Université-Paris Sud; seminario: “ Self assembled monolayers on gold the challenge”; Università degli Studi di Trieste, 1 luglio 2011. Dott. Matteo Castronovo; seminario: “The effect of confinement on enzymes diffusion and reactions inside DNA nanostructures”; Università degli Studi di Trieste, 29 luglio 2011. “Summer School on Nanotechnology”, Università degli studi di Trieste, 20-23 settembre 2011. Dott.ssa Cristina Gentilini del Imperial College of London; seminario: “Biomimetic scaffold for tissue engineering”; Università degli Studi di Trieste, 22 settembre 2011. Presentazione dei dottorandi del terzo anno della scuola di nanotecnologie; Università degli studi di Trieste, 29 novembre 2011. Attività didattica di supporto e attività didattica attiva Attività didattica di supporto per l’insegnamento di chimica organica I con laboratorio, corso di laurea triennale in chimica, primo anno, Università di Trieste, 40 ore. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 46 YAN-XIN CHEN Title of the thesis: Nanostructured Titanium Dioxide Based Materials for Photocatalysis and Photoelectrocatalysis Supervisor: Paolo Fornasiero Tutors (if any): Claudio Bianchini, Alessandro Lavacchi Research Activity At present most of the methods for the mass production of metal nanocrystals (NCs) can only control the size, with no or little chance to select shape and surface structure. The latter being important for tailoring the catalyitic properties for specific reactions. Pulsed Electrodeposition (PED) provided the first examples of tetrahexadral Pd NCs, whose electroxidation activity expressed in terms of the current density referred to the catalyst Electrochemically Active Surface Area (EASA) has been found to range from 4 to 6 times higher than the state of the art NCs Pd electrocatalyts. However, the catalytic activity per unit weight was still far from being competitive with the state of the art electrocatalysts due to the relatively large size of the particles (> 50 nm). This framework shows clearly that the design of efficient catalyst for the small organic molecule oxidation needs for NCs with high density of poorly coordinated metal atoms at the surface. At the same time an effective catalyst must have a large surface to volume ratio to provide high mass specific activity also being able to be synthesized with metal loading adequate for practical applications. To succeed in the task we propose an alkaline post-treatment aimed at i) reducing the particle size (electrochemical milling) and ii) creating high index facets (shaping). This process shows two main advantages as compared with the PED as i) it allows the deposition of Palladium in the desired loading with virtually any known deposition method and ii) operates in alkaline solutions providing particle shaping through surface oxidation/reduction without metal dissolution. This marks a substantial difference with the PED shaping occurring via a dissolution/growth mechanism which makes difficult to independently control particle size and shape. Publications on scientific journals (printed or in press) (1) “Energy Efficiency Enhancement of Ethanol Electrooxidation on Pd-(CeO2)/C in Passive and Active Polymer Electrolyte-Membrane Fuel Cells”, submitted to Chemsuschem, November, 2011 Valentina Bambagioni, Claudio Bianchini, Yanxin Chen, Jonathan Filippi, Paolo Fornasiero, Massimo Innocenti, Alessandro Lavacchi, Andrea Marchionni, Werner Oberhauser, Francesco Vizza. (2) “RedOx Milling and Faceting (ROMiF) - A Post-Treatment for the Size Control and the High Index Facets Generation of Palladium Nanoparticles.”, (manuscript in preparation) Y.X. Chen, M. Bevilacqua, C. Bianchini, S.G. Sun, S.P. Chen, J. Filippi, P. Fornasiero, M. Innocenti, A. Lavacchi, F. Vizza, F. di Benedetto, A. Marchionni, W. Oberhauser, H. Miller Publications/abstracts in conferences/congresses (national or international) Educational Activity Classes followed (date, course, professor, type of course) - Nanotechnology Summer School 2011 – September 20-23, 2011, Trieste, Italy. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 47 Conferences, seminars, advanced courses and other didactic activities - “Carbohydrate recognition: Chemistry issues and applications”, Prof. Bing-He Wang. 17/05/ 2011, Firenze, Italy. - “Form Metal to Metal-Free Catalysts”, Dr. Cuong Phan- Huu & Dr. Francois Garin, 29/06/2011, Firenze, Italy. - “Stability diagram of dipolar Bose Einstein condensate in an optical lattice”, Dr. Alves Emmauel De Lima Henn, 13/10/2011, Firenze, Italy. - “High resolution structure and stability of gold nanoparticles/protein complex”, Dr. Luigi Calzolai, 18/10/2011, Firenze, Italy. - “Computer simulation of biomolecules”, Draio A. Estrin, 26/10/2011, Firenze, Italy. Support educational activity and teaching - Read the book《Scanning Microscopy for Nanotechnology》, 2-21 May, 2011, total 30 hours - Read the book《Characterization of Nanophase Materials》, 10-20 Auguest, 2011, total 40 hours - Read the book《Renewable Resources and Renewable Energy: A Global Challenge, Second Edition》, 5-20 October, 2011, total 60 hours - Read the book《Handbook of Electrochemistry by Cynthia G. Zoski》, 1-20 November, 2011, total 80 hours Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 48 MARIO GANAU Titolo della tesi: Applicazioni nanotecnologiche nell’ambito delle neuroscienze quantitative: analisi proteomica dei gliomi cerebrali di alto grado Supervisore: Prof. GIACINTO SCOLES e Dr.ssa LOREDANA CASALIS (SENIL Nanoinnovation Lab. - Sincrotrone Elettra, Trieste) Tutori (eventuali):/ Attività di ricerca Il principale obbiettivo della presente Tesi di Dottorato è l’analisi proteomica di cellule astrocitarie sotto influenza di stimoli esterni al fine di chiarire il ruolo delle cellule gliali nei processi di oncogenesi. Una review sistematica della letteratura relativa all’analisi proteomica dei gliomi ha evidenziato l’alterazione di circa 100 proteine. L’attuale limite tecnico degli studi di proteomica dei gliomi cerebrali è legato all’elevata sensibilità necessaria per monitorare le pathways cellulari, e le loro relative interazioni proteiche, sotto stimoli fisiologici e patologici. Per superare questo limite abbiamo deciso di sviluppare un approccio nanoquantitativo che consenta un’analisi proteomica precisa, ad alta sensibilità e basso costo, con potenzialità di screening in tempo reale e sottotipizzazione di tumori cerebrali. Al termine del primo anno avevamo tracciato due approcci paralleli e sinergici da perseguire: 1) uno basato sulla fabbricazione di microwells per l’immobilizzazione di cellule viventi, e 2) l’altro volto all’ottimizzazione di nanopatches per l’analisi di proteine o anticorpi in soluzione. In tal senso al fine di valutare la capacità delle cellule selezionate (E.Coli gentilmente forniti dallo Structural Biology Lab @ Elettra) di aderire e sopravvivere all’interno dei microwells di PDMS, erano stati condotti una serie di trials, con e senza mezzo di coltura, che avevano dimostrato con successo la possibilità di immobilizzare cellule viventi e di consentire la loro attiva replicazione all’interno dei microcostrutti. Nel corso del secondo anno ci si è quindi dedicati all’ottimizzazione di nanopatches per la specifica analisi proteomica di cellule astrocitarie. I biomarkers su cui si è focalizzata la nostra attenzione sono la Glial Fibrillary Acidic Protein (GFAP), che appartine alla famiglia dei filamenti intermedi che svolge un riolo cruciale per il funzionamento del citoscheletro celluare; e la p53 che appartiene alla classe degli oncosoppressori. Entrambe queste proteine sono alterate nelle cellule gliomatose mentre la prima può anche essere repertate nel secretoma di astrociti tumorali, la seconda richiede una loro analisi proteo mica. Per la fabbricazione di nanoarrays, concepiti per l’immobilizzazione di qualsiasi anticorpo biotinilato specifico per le suddette proteine è stato scelto un approccio basato sul nanografting con Microscopio a Forza Atomica (AFM). Le due seguenti strategie sono state adottate: 1) DNA-directed-immobilization (DDI) di anticorpi biotinilati. Nanopatches di DNA a singola elica (ssDNA) sono stati graftati in una matrice di monostrati autoassemblati (SAM) di superfici d’oro alchiltiolo modificato. Al fine di sfruttare la capacità della streptavidina (STV) di legarsi ad un anticorpo biotinilato è stata successivamente indotta l’ibridazione di un filamento di DNA complementare (cDNA) a quello precedentemente immobilizzato sulla superficie nanoassemblata che presentasse Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 49 2) anche un tag di STV. Sfortunatamente, nonostante i ripetuti esperimenti e l’impiego di diversi filamenti di DNA [i.e. cf5 and cf9], questo approccio è risultato insoddisfacente nell’ottenere un costrutto DNA-STV funzionale, ciò è probabilmente dovuto ad un problema di stabilità a lungo termine del coniugato STV-DNA. E’ stato pertanto sfruttato un approccio leggermente più sofisticato, necessitante due fasi per la realizzazione del suddetto coniugato DNA-STV. Un differente filamento di ssDNA [i.e. cf4] è stato ibridizzato al suo cDNA che presentava un ligando specifico per la tirosine piuttosto che un tag di STV. La formazione di un coniugato DNA-STV è stata quindi ottenuta in una seconda fase dell’esperimento grazie all’interazione tra il ligando per la tirosina e i residui tirosinici della STV stessa. In tal modo si è riusciti ad ottenere la formazione di coniugati DNA-STV, purtroppo però ad ora questi non sono risultati sufficientemente stabili da immobilizzare anticorpi biotinilati antiGFAP (GFAP Ab). Fabbricazione di biotina alchiltiolo modificata. Nanopatches di biotina sono stati graftati in una matrice di monostrati autoassemblati (SAM) di superfici d’oro alchiltiolo modificato. I siti di legame per la biotina propri della STV [4 siti per ciascun tetramero di STV] sono stati sfruttati per immobilizzare ai patches di biotina anticorpi monoclonali antiGFAP. Al momento questa strategia ha dimostrato di essere la più efficace. Obbiettivi da raggiungere per l’anno successivo (se applicabile) Il passo successivo nel percorso di ricerca è costituito dall’ottimizzazione dei nanopatches di biotina alchiltiolo-modificata coniugata alla STV, che al momento pare il substrato più conveniente per l’immobilizzazione di anticorpi biotinilati (i.e. per la GFAP). Nonostante ciò la nostra attenzione sarà comunque focalizzata anche al conseguimento della strategia con DDI (nella speranza che costrutti più stabili possano rappresentare la risposta ai problemi incontrati durante l’anno appena trascorso), che risulta mandatoria per poter realizzare un’analisi multiplexing. Inoltre ci riserviamo di testare i nostri nanopatches di anticorpi antiGFAP con 1) GFAP di controllo ricombinante, e 2) GFAP umana contenuta nel lisato di astrociti maligni. Attività formativa Posters/Abstracts a congressi nazionali e internazionali M.Ganau, P.Parisse, S.Corvaglia, L.Ianeselli, D.Scaini, C.Sanavio, L.Casalis, G.Scoles. Proteomic analyses of malignant gliomas. Regional Summer School of Nanotechnology 2011 S.Corvaglia, M.Ganau, Fruk L, Sanavio B, Ianeselli L, Cesselli D, Beltrami AP, Scoles G, Scaini D, Casalis L. Combination of novel protein nanoarrays and microwells devices for single cell protein profiling. Gordon Research Conference Proceedings 2011 Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) 11-14 Gennaio, 2011: Corso di Statistica per Specializzandi in Medicina c/o UniTs 11 Aprile, 2011: Prof Livesey, Seminario “Stem cell models of human cerebral cortex development and disease” c/o UniTs 24 Giugno, 2011: Prof Legname (SISSA), Prof Zanusso (UniVr), Prof Geschwind (UCSF) Seminario: Molecular Biology and clinical aspects of prion diseases c/o UniTs 29 Luglio, 2011: Dr Castronovo (Temple University): The Effect of Confinement on Enzymes Diffusion and Reactions Inside DNA Nanostructures c/o UniTs Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 50 31 Ottobre – 1 Novembre, 2011: Lectures on Quantitative approaches to Biological Problems c/o ICTP Congressi, seminari, corsi avanzati e altre attività didattiche passive 17-19 Gennaio 2011: Congresso annuale della Scuola di Dottorato in Nanotecnologie c/o UniTs 2 Febbraio, 2011: Seminario “BioMol” c/o Elettra 24 Marzo, 2011: Seminario “Brain Awareness Week” c/o Centro Interdipartimentale per le Neuroscienze Brain 19-23 Settembre, 2011: Summer School Regionale di Nanotechnologia c/o UniTs 10-14 Ottobre, 2011: Joint ICTP-KFAS conference on Nanotechnology for Biological and Biomedical Applications (Nano-Bio-Med) c/o ICTP 31 Ottobre – 1 Novembre, 2011: Conference on System Biology and New Sequencing Techniques c/o ICTP Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 51 VALENTINA GIORGIS Titolo della tesi: Development, design and characterization of Metamaterials Supervisore: Filippo Romanato Tutori (eventuali): Attività di ricerca Il progetto di ricerca è focalizzato sulla progettazione, fabbricazione e caratterizzazione di metamateriali, in particolare sulla geometria Split Ring Resonator (SRR). Il primo passo, la progettazione, viene eseguito con il supporto del software COMSOL, con l'aiuto dei teorici del gruppo (LaNN, PAdova). I campioni sono fabbricati con la tecnica della litografia a raggi X e vengono poi cresciuti utilizzando la crescita elettrolitica in soluzione d'oro. Altre tecniche utilizzate come supporto alla fabbricazione degli SRR sono wet e dry etching (produzione membrane per maschere X), l'evaporazione di metalli (produzione di un substrato conduttivo), lo sputtering (produzione substrato). Nello step litografico sono stati utilizzati resist di tono positivo e negativo e diversi substrati: silicio, membrane di nitruro di silicio, vetro e ITO. Lo scopo finale è la fabbricazione di strutture alte (600-700nm) su substrato trasparente. Al momento sono stati prodotti campioni di area estesa su supporto trasparente (vetro e ITO) ed è stata caratterizzata una maschera per litografia utilizzando l'ellissometro presso LaNN. Sviluppo futuro della ricerca: analisi di differenti geometrie (diverse simmetrie, strutture inclinate), eventuale utilizzo dei campioni come sensori biochimici. Oltre al progetto di tesi ho collaborato a diversi progetti di ricerca all'interno del mio gruppo, nella fabbricazione di campioni (crescita elettroliticha, evaporazione), e all'interno di progetti con aziende a altre università. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa), F. Romanato, M. Massari, T. Ongarello, M. Carli, G. Pirruccio, D. Sammito, V. Giorgis, D. Garoli, R. Bozio, R. Pilot, R. Signorini, P. Schiavuta, F. Marinello, “Design, Fabrication and characterization of Plasmonic Gratings for SERS”, Microelectronic Engineering 88 (8), pp. 27172720 D. Garoli, M. Natali, G. Parisi, T. Ongarello, E. Sovernigo, M. Massari, V. Giorgis, G. Ruffato, S. De Zuani, F. Romanato “Fabrication of metamaterials in the optical spectral range”, Microelectronic Engineering 88 (8), pp. 1951-1954 Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) V. Giorgis, F. Romanato, M. Massari, G. Parisi, M. Carli, D. Sammito, E. Sovernigo, “Design, Fabrication and Characterization of Split Ring Resonators using X-Ray Lithography”, MNE 2011 G. Bovo, D. Sammito, D. De Salvador, G. Biasiol, M. Gaio, T. Ongarello, V. Giorgis, “Design of a plasmonic structure integrated on a GaAs HEMT photodetector for biosensing applications”, MNE 2011 D. Sammito, G. Zacco, P. Zilio, V. Giorgis, A. Martucci, J. Janusonis, “Design and fabrication of plasmonic gratings for bulk Silicon solar cell light harvesting enhancement”, MNE 2011 S. De Zuani, M. Natali, D. Garoli, V. Giorgis, M. Massari, G. Parisi, “Ferroelectric metamaterials: towards a refractive index control”, Metamaterials 2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 52 Altre pubblicazioni D. Sammito, P. Zilio, G. Zacco, V. Giorgis, F. Romanato, “Nanotrutture plasmoniche per la raccolta della luce, PV Technology, 4/4/2010, p,46 Attività formativa Congressi, seminari, corsi avanzati e altre attività didattiche passive Nanotechnology Summer School 2011, Trieste, 20/09/2011-23/09/2011 Metamaterials 2011, Barcellona, 10/10/2011-13/10/2011 Metamaterials Doctoral School, 14/10/2011-15/10/2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 53 MARIANNA LUCAFO’ Titolo della tesi: NANOSTRUTTURE DI CARBONIO COME VETTORI PER FARMACI ANTITUMORALI Supervisore: PROF. GIANNI SAVA Tutori (eventuali): DOTT. SABRINA PACOR, PROF. SONIA ZORZET E DOTT. TATIANA DA ROS Attività di ricerca Il progetto prevede lo studio di nuove nanostrutture di carbonio, quali ad esempio fullereni, il cui impiego in campo biomedico è di forte interesse grazie alla possibilità di essere funzionalizzati agendo come sistemi di drug delivery per il trasporto di farmaci. Sono stati condotti studi in vitro su fullereni funzionalizzati impiegando diverse linee cellulari con l’obiettivo di valutare se gli effetti tossici o meno di questi composti possano variare a seconda dalla linea cellulare utilizzata. I modelli di studio utilizzati sono linee cellulari neoplastiche di carcinoma mammario umano, di adenocarcinoma umano di colon e di adenocarcinoma polmonare umano non a piccole cellule. Gli studi di citotossicità hanno permesso di individuare un fullerene che presenta una limitata tossicità (F2) con il quale sono state eseguite prove citofluorimetriche sulla linea MCF7 che hanno dimostrato come sia in grado di attraversare le membrane plasmatiche e di accumularsi nelle cellule già dopo un’ora, aumentando in quantità fino a 12 ore. L’analisi è stata condotta fino alle 72 ore, tempo in cui il valore di fluorescenza del fullerene sembra rimanere stabile. Mediante microscopia a fluorescenza, sono stati condotti studi di distribuzione sub-cellulare, dai quali è emerso che F2 non colocalizza né a livello mitocondriale nè lisosomiale; quest’ultima evidenza lo renderebbe un vettore stabile per farmaci acido-labili. Inoltre, la mancata internalizzazione del fullerene a livello nucleare escluderebbe la possibilità di un danno diretto a carico del materiale genetico. In parallelo sono stati condotti i primi esperimenti sul coniugato F2-DOXORUBICINA ma le prove di citotossicità hanno indicato che il coniugato, nella linea MCF7 ed MCF7/ADR, ha attività irrilevante rispetto alla doxorubicina libera. Tuttavia risulta che la doxorubicina trasportata da F2 viene internalizzata maggiormente nella linea MCF7/ADR rispetto alla linea MCF7, contrariamente a quanto avviene con la doxorubicina libera. È possibile quindi affermare che F2 si potrebbe dimostrare un valido vettore per eludere il problema della multidrug resistence nei confronti di farmaci antitumorali causata dall’attività estrusiva della pompa P-gp. L’ostacolo da superare rimane quindi la scelta del farmaco da coniugare visto che questo ipotetico vettore non entra nel nucleo (e che quindi la doxorubicina e altri antitumorali ad azione nucleare non potrebbero svolgere le proprie funzioni) nelle linee studiate. In alternativa si potrebbe pensare di legare il farmaco al fullerene attraverso un legame più debole in modo da facilitarne il rilascio citosolico. Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) 28-30 Marzo 2011 –Trieste- 5° Meeting Nuove Prospettive in Chimica Farmaceutica SIF; Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 54 14-17 Settembre 2011 -Bologna- 35° Congresso Nazionale Della Società Italiana di Farmacologia; Attività formativa Congressi, seminari, corsi avanzati e altre attività didattiche passive 20-23 Settembre 2011 -Trieste- Nanotechnology Summer School 2011 Attività didattica di supporto e attività didattica attiva Correlatrice nella tesi di laurea della facoltà di Farmacia, dal titolo: Nanovettori per farmaci antitumorali: studio di un fullerene funzionalizzato ed analisi preliminare del coniugato con la doxorubicina. Relatore Pacor S. (Orlando R., C.d.L. CTF, A.A. 2010-2011) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 55 LUCIA MARSICH Titolo della tesi: “Design and synthesis of functionalized metal nanoparticles for bio-analysis with Surface-Enhanced Raman Scattering (SERS)” Supervisore: Valter Sergo Tutori: Alois Bonifacio Attività di ricerca Durante il primo anno di dottorato ho sviluppato un substrato SERS attivo, costituito da nanoparticelle di argento ridotte con il citrato ricoperte dalla poli-L-lisina (PLL-AgNPs). Il substrato così ottenuto è stato utilizzato per misurare la bilirubina libera. All'inizio del secondo anno una curva di calibrazione è stata costruita, le bande di confidenza, il limite di rilevabilità (LOD) e il limite di rilevabilità quantitativo (LOQ) è stati calcolati, con lo scopo di poter quantificare la bilirubina in campioni con concentrazione incognita. E` stata analizzata l'interazione dell'albumina con le nanoparticelle, dal momento che in presenza di questa proteina il segnale SERS della bilirubina diminuisce. Le immagini TEM raccolte d dopo aver aggiunto l'albumina alle PLL-AgNPs mostrano la proteina legata allo strato di PLL attorno alle NPs. La bilirubina è stata isolata dalle proteine del siero con un filtro ibrido di poliacrilamide/agarosio utilizzando un sistema per gel-elettroforesi. Ma lo spettro non ha mostrato alcuna banda vibrazionale. Attualmente sono oggetto di studio altri metodi per isolare la bilirubina dalle proteine del siero. Si sta pianificando di utilizzare le PLL-AgNPs per quantificare l'uptake di culture cellulari esposte a concentrazioni nanomolari di bilirubina. A riguardo sono stati effettuati degli esperimenti preliminari, in particolare per trovare una soluzione tampone che possa essere applicata per la crescita delle cellule e per le misure SERS. L’HEPES è risultato avere queste caratteristiche. La bilirubina è stata quantificata nelle soluzioni di HEPES e l’intensità dello spettro risulta proporzionale alla concentrazione. Durante il periodo presso la Technische Universitaet a Berlino (gruppo del prof Hildebrandt) saranno sviluppate delle NPs per rilevare il Citocromo-C attaccato ad un elettrodo d’oro. Attualmente sono oggetto di studio diversi tipi di substrati SERS attivi costituiti da AgNPs. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa): Marsich, L., Moimas, L., Sergo, V., Schmid, C.; “Raman spectroscopic study of bioactive silicabased glasses: The role of the alkali/alkali earth ratio on the Non-Bridging Oxygen/Bridging Oxygen (NBO/BO) ratio”; Spectroscopy 23, 2009; pp 227-232 In preparation: Marsich L., Bonifacio A., Sergo V.; “Polylysine coated silver nanoparticles as sensors for bilirubin quantification using Surface Enhanced Raman Spectroscopy”. Poster: Polylysine coated silver nanoparticles as sensors for bilirubin quantification using Surface Enhanced Raman Spectroscopy (SERS)”, L. Marsich, A. Bonifacio, V. Sergo; Yellow Retreat – Trieste, 06 – 07 giugno 2011 (Congresso sulla biliribina organizzato dal Centro Studi Fegato) Attività formativa Periodi di permanenza all’estero (data e Sede) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 56 Dal 24 ottobre 2011 fino al Aprile 2012 - Berlino (Germania) presso la “Technische Universitaet” nel “Institut fuer Chemie Max-Volmer-Laboratorium für Biophysikalische Chemie”. Esami sostenuti, ore di lezione e di laboratorio seguite (sostituiti da studio personale) Libri: o R. Aroca, “Surface-Enhanced Vibrational Spectroscopy” 2006 John Wiley & Sons, Ltd o “Bile pigments and Jaudice , Edited by J. Donald Ostrow. New York: Marcel Dekker, Inc., 1986. o D. Harvey, “Modern Analytical Chemistry”, 2000 McGraw-Hill Higher Education o F. Siebert and P. Hildebrant, “Vibrational spectroscopy in Life Science”, 2008, WILEY-VCH Reviews: Hyunhyub Ko at al., ”Nanostructured Surfaces and Assemblies as SERS Media”, Small 2008, 4, No. 10, 1576–1599 Richard J. C. Brown, Martin J. T. Milton, “Nanostructures and nanostructured substrates for surface-enhanced Raman scattering (SERS)”, J. Raman Spectrosc. 2008; 39: 1313–1326 Xiu-Mei Lin, Yan Cui, Yan-Hui Xu, Bin Ren, Zhong-Qun Tian, “Surface-enhanced Raman spectroscopy: substrate-related issues”, Anal Bioanal Chem, DOI 10.1007/s00216-009-2761-5 J. Millstone et al. “Colloidal gold and silver triangular nanoprisms.”, Small, 2009, Vol 5, Issue 6, Pages 646-664 A. Guerrero Martinez “Nanostars shine bright for you: Colloidal synthesis, properties and applications of branched metallic nanoparticles” Current Opinion in Colloid & Interface Science, Volume 16, Issue 2, April 2011, Pages 118-127. Congressi, seminari, corsi avanzati e altre attività didattiche passive Final Conference 2009 – Trieste,18 - 20 gennaio 2010 (PhD School in Nanotechnology) How to present scientific results, Trieste 22 gennaio 2010 Yellow Retreat – Trieste, 08 – 09 marzo 2010 (Congresso sulla bilirubina organizzato da Centro Studi Fegato) Intensive course about "Molecular self-assembling and nanostructures” , Trieste 23 giugno - 13 luglio 2010 Tour of SENIL laboratories (Elettra) - Trieste, 20 luglio 2010 XVI Scuola Nazionale di Scienza dei Materiali – Bressanone (BZ), 27 settembre - 02 ottobre 2010 “High-Resolution Integrated Micro Electrode Arrays (MEAs) for Imaging Neurophysiological Signaling” – Trieste, 25 ottobre 2010 “Introduzione alla tecnologia MEMS”, Dr Ing Cristina Bertoni – Trieste, 12 aprile 2011 “Synthesis and structure elucidation of kaolinite organo-complexes”, János Kristóf and Erzsébet Horváth – Trieste, 3 maggio 2011 Yellow Retreat – Trieste, 06 – 07 giugno 2011 (Congress about bilirubin studies organized by Centro Studi Fegato) “Self assembled monolayers on gold the challenge”, Dr. HIcham Hmamoudi - 1 luglio 2011 “The Effect of Confinement on Enzymes Diffusion and Reactions Inside DNA Nanostructures”, Matteo Castronovo – 18 luglio 2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 57 Regional Summer School of Nanotechnology – Trieste, 19 – 23 settembre 2011 Attività didattica di supporto e attività didattica attiva 20 h di tutoraggio a tre studenti nel laboratorio di spettroscopia Raman. Addestramento tesisti alla sicurezza nel laboratorio chimico. Correlatore di una tesi specialistica in ingegneria dei materiali dal titolo: “Sintesi e caratterizzazione di nanoparticelle ibride semiconduttore-metallo come marcatori ottici per applicazioni biomediche”. Correlatore di una tesi triennale in ingegneria industriale dal titolo: “Nanostrutture metalliche per applicazioni SERS (Surface Enhanced Raman Spectroscopy) ottenute per deposizione di oro”. Correlatore di una tesi triennale in ingegneria industriale dal titolo: “Valutazione dei rischi e pianificazione del sistema di prevenzione e protezione: applicazione ad un laboratorio chimico universitario a scopo didattico e di ricerca”. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 58 ANGELO PERONIO Titolo della tesi: Catalisi eterogenea a livello delle singole molecole Supervisore: prof. Giovanni Comelli Tutori (eventuali): dr. Carlo Dri Attività di ricerca Il mio tema di ricerca è lo studio di sistemi modello per la catalisi eterogenea a livello delle singole molecole che li compongono, utilizzando le tecniche di microscopia e spettroscopia con risoluzione sub-molecolare messe a disposizione da un microscopio a scansione ad effetto tunnel a bassa temperatura (LT-STM). Quest’anno in particolare ho proseguito lo studio del coadsorbimento di NO e NH3 sulla superficie (111) del platino mediante simulazioni di struttura elettronica basate sulla teoria del funzionale della densità (DFT). Innanzitutto la geometria di adsorbimento di questo sistema – ipotizzata in precedenza a partire dai risultati STM – è stata confermata riproducendo le immagini STM e vari risultati di spettroscopia elettronica e vibrazionale presenti in letteratura; successivamente lo spettro vibrazionale calcolato su questa geometria ha permesso di interpretare correttamente le misure effettuate lo scorso anno di spettroscopia vibrazionale su singole molecole (IETS); in questo momento è in corso la caratterizzazione del legame NO – NH3 con l’ipotesi che si tratti di un legame a idrogeno. Ho caratterizzato inoltre il rumore nella corrente di tunnelling del microscopio, che al presente rende estremamente difficoltose le misure IETS per energie maggiori di 100 meV. La misura della densità spettrale della corrente ha permesso di individuare e distinguere i contributi principali al rumore, inoltre ho messo a punto un metodo quantitativo per determinare la miglior frequenza di misura e per paragonare le prestazioni di diversi convertitori tensione-corrente, tenendo conto anche della funzione di trasferimento tensione/corrente misurata dell’STM. Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) 27 ottobre 2011: poster “A NH3‒NO coadsorption complex on Pt(111)” presso la conferenza Slonano 2011, Institut Jožef Stefan, Ljubljana (SLO). Attività formativa Periodi di permanenza all’estero (data e Sede) 7 novembre 2011 – 22 dicembre 2011: presso il gruppo del prof. Saw-Wai Hla, Ohio University, Athens, Ohio, USA Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) 21 giugno 2011 – 15 luglio 2011: corso “Molecular self-assembling and nanostructures”, docenti d.ssa Loredana Casalis, prof. Alberto Morgante, prof.ssa Lucia Pasquato, ore seguite 10. Congressi, seminari, corsi avanzati e altre attività didattiche passive 17-19 gennaio 2011: “Congresso annuale della Scuola di Dottorato in Nanotecnologie”, Università degli Studi di Trieste; Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 59 3 maggio 2011: seminario “Synthesis and structure elucidation of kaolinite organo-complexes” dei proff. János Kristóf ed Erzsébet Horváth dell’Università della Pannonia, Università degli Studi di Trieste; 1 luglio 2011: seminario “Self assembled monolayers on gold the challenge” del dr. Hicham Hamoudi dell’Université-Paris Sud, Università degli Studi di Trieste; 20-23 settembre 2011: First Joint Summer School on Nanotechnology, Università degli Studi di Trieste; 27 ottobre 2011: conferenza Slonano 2011, Institut Jožef Stefan, Ljubljana (SLO). Attività didattica di supporto e attività didattica attiva 4 aprile 2011: seminario con laboratorio per studenti delle scuole superiori “La fisica delle celle a combustibile ad idrogeno” presso il dipartimento di Fisica dell’Università degli Studi di Trieste, all’interno del Progetto Lauree Scientifiche dell’Università degli Studi di Trieste. Vincitore del primo premio del concorso nazionale Progetto Lauree Scientifiche. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 60 DAVIDE SAMMITO Titolo della tesi: Design, Fabrication and Characterization of Plasmonic Nanostructures for Solar Cells Light Harvesting Enhancement Supervisore: prof. Filippo Romanato Attività di ricerca La mia attività di ricerca è dedicata allo studio dell’integrazione di reticoli metallici nanostrutturati su dispositivi opto-elettronici al fine di sfruttarne gli effetti plasmonici e controllare le caratteristiche di assorbimento della radiazione luminosa. In particolare, nel corso dell’ultimo anno, ho lavorato su tre differenti applicazioni dei cristalli plasmonici. La prima, nell’ambito del progetto europeo ORION, riguarda l’integrazione di nanowire di argento con sezione rettangolare periodicamente disposti sulla superficie superiore di celle solari convenzionali in Silicio. Tramite simulazioni numeriche sono state individuate configurazioni geometriche del reticolo capaci di aumentare l’assorbimento della cella per una polarizzazione della luce (TM) fino a 3.6% mentre non esistono configurazioni che determinano un miglioramento per radiazione non polarizzata. E’ stato sviluppato un processo di fabbricazione basato su litografia laser interferenziale capace di realizzare le nanostrutture progettate sulle ampie superfici delle celle solari. Dopo aver implementato un upgrade sul setup di misura dell’efficienza quantica, sono stati caratterizzati diversi dispositivi integranti i reticoli plasmonici e sono stati estratti spettri in accordo con l’andamento simulato. La seconda attività riguarda la modellizzazione ottica di cristalli plasmonici all’interno di celle solari organiche aventi come strato attivo un bilayer costituito da C60 e CuPc. Un aumento del 11% dell’assorbimento per luce non polarizzata può essere ottenuto ottimizzando un reticolo inserito nello strato di trasporto per le buche. L’ultima attività invece riguarda la realizzazione di un fotorivelatore per applicazioni in biosensoristica costituito da eterostrutture epitassiali in AlGaAs/GaAs. Reticoli a forma di solchi a V coperti da un sottile strato di oro sono stati realizzati sulla superficie superiore per rivelare la presenza di analiti tramite effetti plasmonici. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa), Garoli D., Romanato F., Zilio P., Natali M., Marinello F., Ongarello T., Sammito D., De Salvador D., “Fabrication of "nano-rocket-tips" for plasmonic nanofocusing” (2011) Microelectronic Engineering, 88 (8), pp. 2530-2532. Romanato F., Pilot R., Massari M., Ongarello T., Pirruccio G., Zilio P., Ruffato G., Carli M., Sammito D., Giorgis V., Garoli D., Signorini R., Schiavuta P., Bozio R., “Design, fabrication and characterization of plasmonic gratings for SERS” (2011) Microelectronic Engineering, 88 (8), pp. 2717-2720. Zacco G., Romanato F., Sonato A., Sammito D., Ruffato G., Morpurgo M., Silvestri D., Carli M., Schiavuta P., Brusatin G., “Sinusoidal plasmonic crystals for bio-detection sensors” (2011) Microelectronic Engineering, 88 (8), pp. 1898-1901. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 61 Zilio P., Sammito D., Zacco G., Romanato F., “Absorption profile modulation by means of 1D digital plasmonic gratings” (2010) Optics Express, 18 (19), pp. 19558-19565. Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) Poster: D. Sammito, P. Zilio, G. Zacco, A. Martucci, M. Dai Prè, J. Janusonis, J. Ulbikas, S. Padovani, F. Rasello, S. Sinesi and F. Romanato, “The ORION project: nanotechnology applied to bulk Silicon solar cells”, NanotechItaly 2011, Venezia 23-25 Novembre 2011 Poster and Conference Proceedings: G. Zacco, D. Sammito, P. Zilio, G. Melcarne, G. Gigli, M. Mazzeo, F. Romanato, “Light harvesting enhancement in organic solar cells through the integration of plasmonic crystals”, 26th European Photovoltaic Solar Energy Conference and Exhibition, Hamburg 5-9 Settembre 2011 Poster: G. Bovo, D. Sammito, D. De Salvador, G. Biasiol, M. Gaio, V. Giorgis, P. Zilio, T. Ongarello and F. Romanato, “Design of a plasmonic structure integrated on a GaAs HEMT photodetector for biosensing applications”, 37th International Conference on Micro and Nano Engineering, Berlino 19-23 Settembre 2011 Poster: V. Giorgis, F. Romanato, M. Massari, G. Parisi, M. Carli, D. Sammito, E. Sovernigo, “Design, Fabrication and Characterization of Split Ring Resonators using X-Ray Lithography”, 37th International Conference on Micro and Nano Engineering, Berlino 19-23 Settembre 2011 Partecipazione a congressi (come relatore) “Design and fabrication of plasmonic gratings for bulk Silicon solar cell light harvesting enhancement”, 37th International Conference on Micro and Nano Engineering, Berlino 1923 Settembre 2011 Attività formativa Congressi, seminari, corsi avanzati e altre attività didattiche passive Congresso: “Nanotechnology school congress”, Università di Trieste 17-19 Gennaio 2011 Corso su linguaggio di programmazione Labview presso Sincrotrone Trieste Aprile 2011 Corso: “Molecular self-assembling and nanostructures”, Università di Trieste Giugno-Luglio 2011 Seminario: “Self assembled monolayers on gold the challenge”, Hicham Hmamoudi presso Università di Trieste 1 Luglio 2011 Seminario: “The Effect of Confinement on Enzymes Diffusion and Reactions Inside DNA Nanostructures”, Matteo Castronovo presso Università di Trieste 29 Luglio 2011 Summer school: “International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion”, organizzato da Helmholtz Zentrum Berlin presso Hirschegg (Austria) 11-18 Settembre 2011 Attività didattica di supporto e attività didattica attiva Tutor di Gianluca Bovo nell’attività sperimentale finalizzata con la tesi di laurea magistrale in Scienza dei Materiali presso l’Università di Padova dal titolo “Multilayer electro-plasmonic nanostructures for biosensing architechtures” Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 62 Dottorandi del 26 ciclo: DAMIANO CASSESE Title of the thesis:Design and realization of nanoelectromechanical and plasmonic devices for Raman spectro-microscopy Supervisor: Marco Lazzarino Tutors (if any): Research Activity During the first year, the following research activities were carried: Design: FEM simulation were performed with COMSOL software to study the development of a cantilever chip capable of high temperature heating (>400oC) in a small area (<2 micrometers), to localize the nanowires growth. Following the result obtained, an optical mask for the chip fabrication was designed with Ledit software. Fabrication: the chip fabrication was begun, even though further analysis of structure compensation in wet etching is needed. Nanowires growth has been achieved on silicon oxide in PECVD; some tests of growth with MBE are underway. Raman spectroscopy: the Raman spectroscopy setup was optimized and the optical components aligned. Some spectra of various samples of interest (graphene, AlGaAS nanowires, carbon nanotubes) were taken along with Raman maps aat the micro-scale using an Andor Technologies spectrograph coupled with JPK AFM movement stage and a ZEISS inverted microscope. Objectives for the following year (if applicable) In the following year we aim to produce the chips with the cantilevers integrated; following the optimization of the nanowires growth process, the complete devices will be produced. The chips will be tested, to confirm their TERS potentiality and their behaviour as AFM cantilevers. We will also focus on raman spectroscopy and maps of samples, both using micro-Raman and TERS, Educational Activity Classes followed (date, course, professor, type of course) Intense course on “Molecular self-assembling and nanostructures”, held by A. Morgante, L. Casalis, L. Pasquato, 21/06/2011 – 18/07/2011 Winter collage in Optics: advances in nano-optics and plasmonics (and preparatory school) at ICTP, to be held from 30th of January till 17th of February Conferences, seminars, advanced courses and other didactic activities Massimiliano Di Ventra (Department of Physics University of California, San Diego), “Fast DNA sequencing: a physicist’s perspective”, seminar at SISSA – Condensed Matter department Workshop on "Circulating Tumor Cells", 7th November 2011, Udine Conference Monalisa’s Quidproquo “Nanotechnology Meets Clinical Medicine", October 68, 2011, Aviano/Udine Summer school of Nanotechnology, Trieste, September 20-23 Konrad Misiura, ‘New Approches in Cancer Therapy’, Trieste János Kristóf and Erzsébet Horváth, “Synthesis and structure elucidation of kaolinite organo-complexes”, May 12 2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 63 STEFANIA CORVAGLIA Titolo della tesi: Modellare substrati su scala nanometrica per la caratterizzazione di singole cellule Supervisore: dr. Loredana Casalis, dr. Denis Scaini Tutori (eventuali): Attività di ricerca La ricerca in ambito biomedico dei meccanismi molecolari di patologie come il cancro ha rivelato come i tessuti malati provenienti da biopsie presentino una distribuzione spaziale molto eterogenea di popolazioni di cellule tumorali all’interno dello stesso campione che lasciano supporre differenze sostanziali anche tra singole cellule. Le tecniche attuali riescono al meglio ad estrapolare dati mediando su campioni di qualche centinaio di cellule e sono perciò insensibili alle variazioni a livello di singola cellula. Per questo, abbiamo come obiettivo lo sviluppo di una nuovo metodologia che ci permetta di isolare e caratterizzare decine di singole cellule dal punto di vista del contenuto proteico (secretoma/proteoma) e di farne un’analisi statistica. Abbiamo sviluppato un array di micropozzetti delle dimensioni di una singola cellula, con lo scopo di immobilizzare le cellule in un volume piccolo che aumenti la concentrazione di proteine rare. Per la detection della proteine stiamo lavorando allo sviluppo di un nano/microarray di anticorpi specifici, prodotto utilizzando una litografia AFM-mediata (Nanografting), a chiusura del pozzetto per l’analisi di specifiche proteine, biomarkers significativi dello stato della cellula. In questo primo anno di dottorato ho lavorato alla realizzazione degli array di micropozzetti, con particolare attenzione alla scelta del materiale più adatto alla crescita di cellule, allo studio dell’influenza delle proprietà meccaniche del materiale sull’adesione e la crescita, all’intrappolamento all’interno del pozzetto di singole/poche cellule e alla chiusura del pozzetto per l’analisi. Sto testando il sistema utilizzando un modello cellulare semplice e facilmente reperibile (linea tumorale HeLa) che faciliti l’applicazione futura a sistemi d’interesse medico. Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) - SIBBM Frontiers in molecular Biology, Trieste, Italy- poster abstract_26-28 maggio 2011; - EBSA 8th European Biophysics congress, Budapest, Ungheria- poster abstract, 23-27 agosto 2011; - CFN Summer School on Nano-Biology, Karlsruhe, Germany- poster abstract, 7-10 settembre 2011; - Summer school of Nanotechnology, Trieste, Italy- poster abstract, 20-23 settembre 2011; - ICTP Conference on Nanotechnology for Biological and Biomedical Applications (Nano-BioMed), Trieste, Italy- poster abstract, 10-14 ottobre 2011 Attività formativa Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) - 21 giugno 2011- 15 luglio 2011, corso "Molecular self-assembling and nanostructures" Lucia Pasquato, Alberto Morgante and Loredana Casalis Congressi, seminari, corsi avanzati e altre attività didattiche passive Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 64 -17-19 gennaio 2011, congressino nanotecnologie, Scuola di dottorato in Nanotecnolgie, università di Trieste, Trieste, Italy ; -2 febbraio 2011 workshop biomol @ ELETTRA Seminari: -10 febbraio Zehra Sayers, “Structural and functional studies on plant metallothioneins and heteromeric G-proteins”; -1 aprile Filippo Lutisani, “Single molecule fluorescence microscopy: new insights”; -7 aprile Ario de Marco “Application opportunities for single domain antibodies”; - 3 maggio -11 maggio Alessandro Laio “Colloquium on condensed matter physics: Exploring the universe of protein structures beyond the protein data bank”. -12 maggio Konrad Misiura, “New approaches in cancer therapy” -13 maggio Giacinto Scoles, “The importance of numbers (with units) and common sense: the inevitability of solar energy for the resolution of energy need”. -21 giugno Massimiliano di Ventra, “Fast DNA sequencing: a physicist’s perspective”; -1 luglio Hlcham Hmamoudi “Self assembled on gold the challenge” -6 luglio Flavio Maran “Superefficient electron transfer trought 310 –helical peptides” Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 65 VALENTINA DAL COL Titolo della tesi: In silico prediction of drug resistance: from cancer targeted therapy to cancer targeted prevention Supervisore: Prof.ssa Sabrina Pricl Tutori (eventuali): Prof. Maurizio Fermeglia Attività di ricerca Le recenti scoperte sulla natura dei processi genetici, implicati nelle trasformazioni neoplastiche, hanno permesso di identificare le lesioni cellulari che promuovono il cancro, individuando target selettivi per la progettazione di nuovi agenti terapeutici efficaci. Durante questo primo anno il mio studio si è focalizzato su due diversi sistemi recettoriali: il recettore tirosin chinasico c-Kit e il recettore 1. Per il primo sistema si è andati a studiare, attraverso tecniche di simulazione molecolare, i cambiamenti strutturali che coinvolgono il dominio JXM (juxtamembrane) del c-Kit in seguito a due differenti mutazioni geniche: 559-560 e V560G. Queste modificazioni portano ad una diversa interazione tra il farmaco d’elezione (Imatinib) e la tasca di binding recettoriale. Si è visto che la mutazione di delezione (559-560) conduce ad uno shifting dell’equilibrio verso la forma attiva della chinasi mentre la missense (V560G), andando ad alterare la conformazione del dominio JXM, permette una migliore interazione dell’Imatinib con il recettore nella sua conformazione chiusa. Si è inoltre sviluppato un modello predittivo 3D, per omologia, del recettore 1, per il quale è mancante una struttura cristallizzata. E’ stata utilizzata una procedura multistep: sviluppo e ottimizzazione della struttura 3D, identificazione del possibile sito di binding, docking di una serie di ligandi, conseguente calcolo dell’energia libera di binding così da confrontare i risultati con i valori sperimentali e, alla fine, verifica della capacità predittiva utilizzandolo per il design di una nuova classe di composti. L’obiettivo finale è renderlo, dopo ulteriori validazioni, uno strumento per il design di ligandi altamente selettivi e per comprendere meglio le interazioni che il recettore instaura con altri sistemi biologici. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa), “2-Difluoromethylene-4-methylenepentanoic acid, a paradoxical probe able to mimic the signaling role of 2-oxoglutaric acid in Cyanobacteria” Liu X, Laurini E, Dal Col V, Posocco P, Ziarelli F, Fermeglia M, Zhang CC, Pricl S, Peng L Organic Letters, Jun 3; 13(11):29247 “Homology model and docking-based virtual screening for ligands of the σ1 receptor” Laurini E, Dal Col V, Mamolo MG, Zampieri D, Posocco P, Fermeglia M, Vio L, Pricl S ACS Med Chem Lett 2011, 2: 834-839 “Activate and respond. A molecular rationale for c-kit activation and drug response by juxtamembrane mutations in GISTs” Dal Col V et al. Mol Cancer Ther 2011 submitted “Activity vs. toxicity of acridine compounds as anti-BVDV agents: a molecular modeling study” Dal Col V et al. Antiviral Res 2011 submitted Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 66 Comunicazione a VNPCF Trieste 2011 28-30 marzo “The long and winding road of the c-Kit JXM domain” Dal Col V et al. Comunicazione a VNPCF Trieste 2011 28-30 marzo “Overview on σ1 receptors: a 3D homology model to solve a part of the enigma” Dal Col V et al. Comunicazione a CDDD L’Aquila 2011 21-23 novembre “Nanozapped! DNA, siRNA, and their dendritic nanovectors: a combined in silico/in vivo/in vitro approach” Dal Col V et al. Comunicazione a CDDD L’Aquila 2011 23-25 novembre “The Sigma-Enigma. A multistep homology modeling of 1 receptors” Dal Col V et al. Comunicazione a Nanotechitaly 23-25 novembre 2011 “Trekking across GISTs: the clinical journey of KIT, PDGFRA, and the in silico prediction of drug resistance in cancer targeted therapy” Dal Col V et al. Attività formativa Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) 60 ore laboratorio MOSE Scuole AMBER school 3-6 maggio 2011 Barcellona Summer school on Nanotechnology 20-23 settembre Trieste COST Training school 2011 (Dendrimers as composites of advanced drug delivery nano systems) Atene 3-7 ottobre 2011 Congressi, seminari, corsi avanzati e altre attività didattiche passive Congressi VNPCF (Vcongresso nuove prospettive in chimica farmaceutica) Trieste 28-30 marzo 2011 CDDD (Computationally driven drug discovery) L’Aquila 21-23 novembre 2011 Seminari “Brached Peptides as Therapeutics” Prof. Bracci 21 marzo 2011 “Challenging the mistery of marine toxins” Prof. Yasumoto 15 aprile 2011 “New approaches in cancer therapy” Prof. Misiura 12 maggio 2011 “Nanosistemi per il drug e il gene delivery a base di derivati dell’acido aspartico” Prof. Cavallaro 1 giugno 2011 “Self assembled monolayers the Challenge” Dr. Hicham Hamoudi 1 luglio 2011 “The effect of confinement on enzyme diffusion and reaction inside DNA nanostructures” Dr. Castronovo 29 luglio 2011 Corsi “Molecular self- assembling and nanostructures”, Prof. Morgante, Casalis, Pasquato Periodo 21/06-29/07/2011 Altre attività didattiche passive Congresso dottorandi Scuola di Nanotecnologie 17-19 gennaio 2011 Presentazione delle attività scientifiche dei gruppi di ricerca del dipartimento DI3 25 febbraio 2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 67 ANDREA FRASSETTO Title of the thesis: Nanostructural analysis of the adhesive interface in dentistry Supervisor: Prof. Milena Cadenaro Tutor: Prof. Lorenzo Breschi Research Activity The first part of the program was focused on the literature review of the adhesive layer degradation and nanoleakage development and on laboratory training, including an accurate analysis at SEM of the interaction of different adhesive systems with the dentin substrate, by the application of adhesive agents on human dentin surfaces, then stored in appropriate in vitro conditions to simulate the oral environment for different time intervals in order to assess nanoleakage expression. Despite acceptable immediate bonding effectiveness of dental adhesives, the durability of resin bonded interface on dentin created by several bonding systems remains questionable. All the commercial adhesives tested presented nanoleakage phenomena after 6 months of aging in artificial saliva. Thus the intrinsic degradation mechanisms originated from beneath dentine hybrid layer by the slow action of matrix metalloproteinases (MMPs) was investigated. The release and activation of these endogenous enzymes during bonding to dentin are thought to be responsible for the in vitro and in vivo manifestation of thinning and disappearance of collagen fibrils from incompletely infiltrated hybrid layers in aged, bonded dentine. Collagen degradation generates several collagen fragments; one of them (ICTP) was quantified by means of commercialized immunoassays. Moreover the loss of mechanical properties of dentinal collagen was correlated, in particular the biaxial flexural modulus of elasticity (EBF). Evaluation of both collagen denaturation and E-modulus could lead to a more clear understanding of the durability of adhesive systems and nanoleakage development. Objectives for the following year (if applicable) • Analysis of new inhibitors of the enzymatic activity of dentin endogenous matrix metalloproteinases (MMPs) • Influence of collagen cross-linkers in the inhibition of MMPs’ activity and subsequent increase of mechanical properties of the adhesive layer Publications on scientific journals (printed or in press) Frassetto A, Navarra CO, Marchesi G, Turco G, Di Lenarda R, Breschi L, Ferracane JL, Cadenaro M. Contraction stress and degree of conversion of self-adhesive resin cements. Dental Materials, submitted. Publications/abstracts in conferences/congresses (national or international) Stress of polymerization of a new self-adhesive vs a conventional dual-cured cement. XVII National Meeting of the College of Dentistry Teachers, Siena. Stress of polymerization and degree of conversion of two self-adhesive vs a conventional dual-cured cement. 21st European Dental Materials Conference; Turku (FI). Microtensile bond strength test of four self-etch commercial adhesives. 21st European Dental Materials Conference; Turku (FI). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 68 Influence of chewing simulation on bond strength of cemented composite-disks. Dent Mater 2011; 27s: e8. Effects of 6-month water storage on micro-tensile bond strength of self-etch adhesives. Dent Mater 2011; 27s: e10. Influence of chewing simulation on bond strength of cemented ceramic-disks. Dent Mater 2011; 27s: e24. Participation to conferences (as speaker) Firenze-Siena 14-16 April 2011; XVII National Meeting of the College of Dentistry Teachers. Poster Presentation, Stress of polymerization of a new self-adhesive vs a conventional dual-cured cement. Educational Activity Periods abroad (date and place) San Diego (USA) 16-19 March 2011 Augusta (USA) 20-22 March 2011 Seili-Turku (FI) 22-26 August 2011 Salvador (BR) 13-15 October 2011 Classes followed (date, course, professor, type of course) Course of Material Sciences, CLSOPD II Semester, Prof. L. Breschi Course of Adhesive Dentistry, CLSOPD II Semester, Prof. L. Breschi Conferences, seminars, advanced courses and other didactic activities Trieste 17-20 January 2011; Annual Meeting of the PhD School in Nanotechnology San Diego (USA) 16-19 March 2011; Annual Meeting of the International Association of Dental Research Augusta (USA) 21-22 March 2011; Research Stage at Medical College of Georgia (Prof. D. Pashley) Trieste 8 April 2011; PhD Final Dissertations of School in Nanotechnology Firenze-Siena 14-16 April 2011; XVII National Meeting of the College of Dentistry Teachers Trieste 12 May 2011; Seminar of Prof. K. Misiura: New Approaches in Cancer Therapy Trieste 1 July 2011; Seminar of Dr. H. Hamoudi: Self assembled monolayers on gold the challenge Trieste 4-8 July 2011; FVG Summer School/Workshop on Structural Bioinformatics Trieste 12 July 2011; Seminar of Prof. S.-W. Hla: Nanoscience at Work: Imaging and Manipulation at Atomic and Molecular Scale Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 69 Seili (FI) 22-24 August 2011; Dental Materials Summer School Turku (FI) 24-26 August 2011; European Dental Materials Conference Trieste 15 September 2011; Seminar of Dr. G. Forte: Adult Stem Cell and Thermoresponsive Polymers for Cardiac Muscle Tissue Engineering Trieste 20-23 September 2011; Summer School of the PhD School in Nanotechnology Salvador (BR) 13-15 October 2011; Annual Meeting of Academy of Dental Materials Bologna 18-19 November 2011; Annual Meeting of Italian Academy of Prosthetic Dentistry Milano 25-26 November 2011; Annual Meeting Expo Dental Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 70 ELISA MINIUSSI Titolo della tesi: Interaction of metal nanoclusters with graphene and low dimensional systems Supervisore: Dr. Alessandro Baraldi Tutori (eventuali): Attività di ricerca Il mio progetto di Dottorato verte sulla produzione e caratterizzazione di nanocluster metallici depositati su opportune superfici solide, in modo particolare sul grafene cresciuto epitassialmente su diversi substrati. La mia attività si articola dunque essenzialmente su due versanti: la crescita epitassiale del grafene e lo sviluppo di una macchina per la produzione e deposizione di nanocluster selezionati in massa. Sul primo fronte, un risultato di rilievo è stato recentemente ottenuto con la pubblicazione su Physical Review Letters di uno studio, iniziato durante la mia tesi specialistica, sul grafene cresciuto epitassialmente su un nuovo substrato, un cristallo singolo di Re(0001). È noto che la forza di interazione tra il grafene e il substrato determina la corrugazione del layer di carbonio, che a sua volta è responsabile delle proprietà di trasporto sia elettronico che termico di quest’ultimo. Le nostre ricerche hanno evidenziato una diretta correlazione tra la forte corrugazione del grafene su questo substrato e la sua instabilità ad alte temperature. È stato inoltre intrapreso lo studio di un nuovo sistema, il grafene cresciuto epitassialmente su una lega di superficie PtRu, finalizzato a comprendere come variando la concentrazione di Pt nel primo layer sia possibile modificare selettivamente l’accoppiamento grafene-substrato, e di riflesso le proprietà morfologiche ed elettroniche del sistema. In parallelo, sono iniziati i lavori di assemblaggio della sorgente di nanocluster presso il laboratorio di Fisica delle Superfici (Dipartimento di Fisica dell’Università di Trieste e Laboratorio TASC (IOM-CNR)). Nell’ambito di questo progetto ho trascorso quattro mesi con una borsa Erasmus Placement presso il Dipartimento di Chimica Fisica della Technische Universität di Monaco di Baviera (TUM), dove questa tecnologia è stata sviluppata allo stato dell’arte nel corso degli ultimi anni. In questo modo ho potuto apprendere i principi di funzionamento e le modalità operative delle sorgenti e della strumentazione scientifica utilizzata in combinazione con esse. Ho successivamente sfruttato le conoscenze così acquisite per portare a termine la fase preliminare di assemblaggio della macchina. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa) E. Miniussi, M. Pozzo, A. Baraldi, E. Vesselli, R. R. Zhan, G. Comelli, T. O. Menteş¸ M. A. Niño, A. Locatelli, S. Lizzit, and D. Alfè, “Thermal Stability of Corrugated Epitaxial Graphene Grown on Re(0001)”, Phys. Rev. Lett. 106, 216101 (2011). Altre pubblicazioni E. Miniussi, M. Pozzo, A. Baraldi, E. Vesselli, R. R. Zhan, G. Comelli, T. O. Menteş¸ M. A. Niño, A. Locatelli, S. Lizzit, and D. Alfè, “A link between corrugation and thermal stability of epitaxial graphene”, Elettra Highlights 2010-2011, pagg. 66-67. Partecipazione a congressi (come relatore) Presentazione orale del seminario intitolato: “A link between corrugation and thermal stability of epitaxial graphene”, in occasione dell’assegnazione del premio Fonda-Fasella 2011 conferitomi Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 71 durante il workshop “Nanoenergetics: theoretical and experimental approaches” (Trieste, 15-16 Novembre 2011). Attività formativa Periodi di permanenza all’estero (data e Sede) Borsista Erasmus Placement dal 1 aprile 2011 al 31 luglio 2011 presso il Dipartimento di Chimica Fisica della Technische Universität di Monaco di Baviera (TUM) (tutori presso l’istituzione ospitante: Prof. U. Heiz e Dr. F. Esch). Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) “Physikalische Chemie von Nanoteilchen und Oberflächen” (Chimica Fisica delle Nanoparticelle e Superfici) http://www.pc.ch.tum.de/index.php?id=193 - Docenti: Dr. F.Esch, Prof. U. Heiz Numero di ore: 40 Contenuti: Introduzione alla Chimica Fisica dei cluster: transizione dagli oggetti di dimensioni atomiche ai solidi di bulk; fabbricazione dei cluster, loro proprietà fondamentali e caratterizzazione sperimentale (diffrazione, spettroscopia, microscopia); cluster elementari ed eterogenei, cluster supportati e loro proprietà catalitiche. Congressi, seminari, corsi avanzati e altre attività didattiche passive Seminar at Elettra: Optical and Dynamical Properties of Hydrogen Bonded Systems Nadja Doslic, Department of Physical Chemistry, University of Zagreb 10 Febbraio 2011, Seminar Room (Elettra) Seminar at Elettra: X-Ray absorption spectroscopy and science at extreme conditions: previous results and new opportunities for the XAFS beamline at Elettra Giuliana Aquilanti, Sincrotrone Trieste 14 Marzo 2011, Seminar Room (Elettra) Seminar at Elettra: Images of excited states Giovanni Piani, Laboratoire Francis Perrin, CEA Saclay, France. 14 Marzo 2011, Seminar Room (Elettra) Seminar at Elettra: Electronic Properties of Functionalized Quasi-Free-Standing Graphene and Monolayer Boron Nitride Danny Haberer, IFW Dresden, Dresden, Germany 21 Marzo 2011, Seminar Room (Elettra) Joint Workshop on Energy and Sustainability: Materials and Processes Chemistry Department, Northwestern University, and Catalysis Research Center, Technische Universität München Institute for Advanced Study (IAS) Technische Universität München, Lichtenbergstr. 2a, 85748 Garching, Germany 13-14 Maggio 2011 4. Joint Nanoworkshop of TU/e, DTU and TUM TUM Institute for Advanced Study (IAS) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 72 TUM Campus Garching 1 Giugno 2011 DFH/UFA Photokat Workshop 2011: Photokatalytische Eigenschaften von Nanostrukturen / Propriétés photocatalytiques des structures nanométriques IAS Building, TUM Campus 14-15 Luglio 2011 XI School on Synchrotron Radiation: Fundamentals, Methods and Applications Duino Castle, Trieste, Italy 5-16 Settembre 2011 First Joint Summer School on Nanotechnology Università di Trieste, Campus di Piazzale Europa 20-23 Settembre 2011 Seminar at Elettra: Adventures in Catalytic Nanospace: resolving catalytic phenomena at the atomic scale Michael Bowker, Wolfson Nanoscience Laboratory and Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Wales, UK. 2 Novembre 2011, Seminar Room (Elettra) Workshop on Nanoenergetics: theoretical and experimental approaches ICTP, Adriatico Guesthouse, Trieste, Italy 15-16 Novembre 2011 Seminar at Elettra: Probing ultrafast symmetry changes with light Simon Wall, Department of Physical Chemistry, FHI (Berlin) 25 Novembre 2011, Seminar Room (Elettra) Seminar at Elettra: XAFS at Elettra: recent achievements and future projects Giuliana Aquilanti, Sincrotrone Trieste 1 Dicembre 2011, Seminar Room (Elettra) Attività didattica di supporto e attività didattica attiva Lettura di articoli e review su argomenti attinenti alla mia attività di ricerca, in particolare: studio sperimentale e teorico delle proprietà del grafene (in generale), crescita del grafene su diversi substrati solidi e sua caratterizzazione, nano cluster metallici e investigazione della loro morfologia, proprietà elettroniche e reattività. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 73 ELISA MITRI Titolo della tesi: Fabbricazione di dispositivi microfluidici per lo studio della risposta biologica di cellule vive sottoposte a stimoli chimico-fisici mediante tecniche di microspettroscopie vibrazionali Supervisore: Massimo Tormen Tutori: Gianluca Grenci, Lisa Vaccari Attività di ricerca La microspettroscopia infrarossa (MIRS) è considerata tra i più promettenti metodi per lo screening medico e diagnostico, grazie alle informazioni strutturali e conformazionali, contenute in uno spettro infrarosso. Lo studio di cellule vive tramite MIRS richiede l'utilizzo di un set-up microfluidico trasparente all'IR, capace di mantenere le condizioni necessarie alla vita delle cellule. Negli anni scorsi presso il mio gruppo è stata messa a punto una piattaforma microfluidica su finestre di CaF2 (materiale trasparente all'IR). Il dispositivo è stato testato con successo presso la beamline SISSI (Elettra, Trieste). Nel mio primo anno di dottorato ho lavorato all'ottimizzazione del set-up con l'intento di risolvere i problemi emersi nei precedenti esperimenti, tra cui: Scarsa aderenza del resist durante il processo fabbricativo dovuto alla bassa energia superficiale del CaF2 (30-50 mJ/m2). Effetti sconosciuti del CaF2 sulle linee cellulari (es neuroni) Protocollo di chiusura del dispositivo In riferimento ai punti 1 e 2, abbiamo modificato le proprietà superficiali del CaF2 tramite sputtering di un sottile strato di Silicio. Questo approccio porta i seguenti vantaggi: Possibilità si operare il processo litografico su un substrato Si-like Assenza di contatto tra cellule e CaF2 Per migliorare il protocollo di incollaggio si propone un nuovo metodo che sfrutta la quantità di solvente residuo nel resist per promuovere l'adesione e la protezione dell'ambiente in cui si confineranno le cellule. Per dimostrare la validità del nostro approccio abbiamo condotto una serie di studi, monitorando diverse linee cellulari (MCF-7, HCT116) all'interno del dispositivo per intervalli di tempo fino a 48 ore. Pubblicazioni/abstracts in conferenze/congressi “Optimization of Microfluidic Systems for IRMS real Time Monitoring of Living Cells” Gianluca Grenci1, Giovanni Birarda1, Elisa Mitri1, Luca Businaro2, Sabrina Pacor3, Lisa Vaccari4, Massimo Tormen1 1CNR-IOM, Laboratorio TASC – Lilit beam line, Basovizza/Italy, 2 CNR ISTITUTO DI FOTONICA E, ROMA/Italy, 3 Life Science Dept., Trieste University, Trieste/Italy, 4 Elettra Synchrotron Light Laboratory, SISSI beam line, Basovizza/Italy “Microfluidic devices for real-time infrared imaging of living cells” G. Birarda1, G. Grenci2, L. Businaro3, E. Mitri2, M. Tormen2, S. Pacor4 and L. Vaccari1 1 Elettra Synchrotron Light Laboratory, ITALY, 2 IOM - CNR, ITALY, 3 Istituto di Fotonica e Nanotecnologie, ITALY, and 4 Trieste University, ITALY Attività formativa Esami sostenuti, ore di lezione e di laboratorio seguite Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 74 “Nanotecnologie e nanomicroscopie” (60 h 7,5 CFU laurea specialistica in biotecnologie mediche) Carlo Dri - Gianluca Grenci “Biologia Cellulare Animale” (48 h, 5 CFU laurea magistrale in chimica e tecnologie farmaceutiche) Sabrina Pacor Congressi, seminari, corsi avanzati e altre attività didattiche passive Seminari "Synthesis and structure evaluation on kaolinite Organo-Complexes" Prof. Janos Kristof – Dr. Elisabeth Horvath 03/05/11 “Self assembled monolayers on gold the challenge” Dr. Hicham Hamoudi “” Dr. Matteo Castronovo Congressi Congresso annuale della scuola 17-19 gennaio 2011, Trieste Conferenze Wirms 2011 - 6th International Workshop on Infrared Spectroscopy and Microscopy with Accelerator-Based Sources – 4-9 settembre 2011, Trieste MNE 2011- 37th International Conference on Micro and Nano Engineerin – 19-23 Settembre 2011 Berlino Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 75 GIUSEPPINA PALMA Titolo della tesi: Celle solari dye-sensitized nanostrutturate Supervisore: Alessandro Fraleoni Morgera Tutori (eventuali): Attività di ricerca Le attività di ricerca del primo anno di dottorato possono essere riassunte in tre punti fondamentali: 1) Comprensione generale dello stato dell’arte relativo alla fabbricazione ed ottimizzazione di celle solari a colorante organico; 2) Messa a punto del set up di caratterizzazione che consiste in un sistema di misura di curve I/V e uno di efficienza quantica; 3) fabbricazione di dispositivi come da letteratura e studio preliminare di metodi per lo sviluppo di uno strato semiconduttore altamente poroso da impiegare nelle celle suddette per aumentarne l’efficienza. Il punto 1) è stato perseguito mediante uno screening approfondito della letteratura del settore e la frequenza di una scuola internazionale dedicata al settore fotovoltaico. Il punto 2) è stato sviluppato dapprima attraverso la frequenza di un corso base di programmazione in Labview, strumento utilizzato per realizzare i software di guida di un set up di caratterizzazione I/V, costituito da un simulatore solare accoppiato ad un multimetro, e di un sistema di determinazione di efficienza quantica. Il punto 3) è stato perseguito cercando di riprodurre le prestazioni delle DSSC riportate in letteratura, che raggiungono l’11% di efficienza. Attualmente la realizzazione di dispositivi altrettanto validi non è stata ancora raggiunta, dato che il lavoro effettivo sui dispositivi è iniziato a partire da Settembre 2011. In particolare, ad oggi i parametri di fill factor e V oc delle celle realizzate sono in linea con i valori dei dispositivi stato dell’arte, mentre la corrente estraibile dal circuito è ancora scarsa. Questo problema verrà affrontato introducendo uno strato compatto di TiO2 tra l’anodo e lo strato semiconduttore mesoporoso, così da reprimere il forte processo di ricombinazione locale; inoltre verrà caricata una maggiore quantità di colorante sullo strato mesoporoso attraverso un processo di multidipping. Inoltre ottimizzazioni dello spessore dello strato nano cristallino e della struttura generale dei dispositivi (contro-elettrodo, elettrolita, isolamento dall’ambiente esterno, ecc) dovrebbero portare ad aumentare l’efficienza globale dei dispositivi, attualmente ferma allo 0.7%. Studi preliminari sull’utilizzo della metodologia ASB-SANS (Auxiliary Solvent-Based Sublimation-Aided NanoStructuring) per incrementare l’efficienza delle celle, attraverso l’aumento di porosità dello strato nanocristallino di TiO2, sono in corso. Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) • 19-23 Settembre 2011: Nanotech Summer School; Trieste, poster session • 17-21 Ottobre, 2011: Workshop on New Materials for Renewable Energies, ICTP, Trieste, poster session Attività formativa Periodi di permanenza all’estero (data e Sede) 11-18 Settebre 2011: Quantsol Summer School; Hirschegg (Austria) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 76 Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) 7 Aprile- 5 Maggio 2011: Corso base di Labview, G. Cautero, corso di formazione presso Elettra (16h) 21 Giugno- 15 Luglio 2011: Summer course on Molecular self-assembling and nanostructures (docenti: L. Casalis (8h), A. Morgante (6h), L. Pasquato (6h)) Congressi, seminari, corsi avanzati e altre attività didattiche passive 17-19 Gennaio 2011: Workshop sulle nanotecnologie (Università di Trieste) 03 Maggio 2011 ore 10: Seminario Nanotech: Synthesis and structure elucidation of kaolinite organo-complexes (János Kristóf and Erzsébet Horváth, University of Pannonia, Institute of Environmental Engineering, Hungary) 03 Maggio 2011 ore 14: Seminario Elettra: The unusual physics of Dirac fermions in graphene (Alessandra Lanzara, University California, Berkeley) 13 Maggio 2011 ore 15: Seminario Elettra: The importance of numbers (with units) and common sense: the inevitability of solar energy for the resolution of energy needs (Giacinto Scoles, University of Udine, Faculty of Medicine, Department of Medical and Biological Sciences, Ospedale di S. Maria della Misericordia in Udine, Italy. 27 Maggio 2011: Celle solari polimeriche e dye-sensitized (Alessandro Fraleoni Morgera, Sincrotrone Trieste) 29 Luglio 2011: ‘The Effect of Confinement on Enzymes Diffusion and Reactions Inside DNA Nanostructures’ (Matteo Castronovo) 1 Luglio 2011 ‘Self assembled monolayers on gold the challenge’ Dr. HIcham Hmamoudi (Université-Paris Sud) 19-23 Settembre 2011: Nanotech Summer School; Trieste (Italia) 17-21 Ottobre 2011: Workshop on New Materials for Renewable Energies, ICTP, Trieste, Italy Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 77 ANDREA RADIVO Titolo della tesi: Studio sperimentale della fisica di dispositivi fotovoltaici organici nano strutturati. Supervisore: Massimo Tormen Tutori : Simone Dal Zilio, Enrico Sovernigo Attività di ricerca In questo primo anno ho concentrato la prima parte del mio lavoro sull’acquisizione delle conoscenze necessarie al progetto e sulla messa a punto di procedure di preparazione e caratterizzazione di celle fotovoltaiche organiche. A tal fine, ho quindi prodotto e caratterizzato celle fotovoltaiche aventi un'interfaccia planare tra strati donore ed accettore, utilizzando diverse combinazioni di materiali. In una seconda parte del mio lavoro, ho elaborato un processo per produrre celle fotovoltaiche organiche aventi un'interfaccia nano strutturata con una struttura interdigitata di materiali donore ed accettore, conformazione che viene considerata in letteratura come ottimale al fine di incrementarne il rendimento. Ho scelto, come materiali attivi diverse coppie di piccole molecole organiche e fullereni ampiamente trattate in letteratura, e come tecnica di nano strutturazione a costo contenuto, il nanoimprinting. La categoria di materiali in esame offre un’ampia gamma di possibili coppie di materiali dalle diverse proprietà optoelettroniche, tuttavia pochi di questi sono risultati adatti al nanoimprinting diretto. Ho quindi scelto un approccio indiretto: nanoimprinting del substrato PEDOTT-PPS, utilizzato come conduttore/collettore di lacune e facilmente stampabile, ottenendo una struttura a righe con diversi periodi e larghezze; deposizione di uno strato conformale di materiale donore per evaporazione; riempimento delle strutture rimanenti mediate deposizione da soluzione o evaporazione del materiale accettore; evaporazione del contatto in alluminio per terminare la cella. Ho applicato questa procedura a diversi materiali, ed i migliori risultati sono stati ottenuti con la coppia Pentacene-PCBM. E’ stato infatti possibile depositare il pentacene in modo quasi conformale sul substrato nanostrutturato in PEDOT:PPS e riempire in modo apparentemente completo e con poche porosità le strutture, con PCBM depositato da soluzione, ottenendo così una struttura interdigitata dei due materiali. Obbiettivi da raggiungere per l’anno successivo: Gli obbiettivi per il prossimo anno di lavoro si possono articolare in: Affinare i processi di produzione per avvicinarsi allo stato dell’arte nella qualità e rendimento delle celle planari; Proseguire con lo sviluppo delle celle nano strutturate in pentacene PCBM e trovare altri materiali per cui il medesimo approccio sia possibile; Sviluppare nuovi sistemi di nano strutturazione delle celle fotovoltaiche organiche; Caratterizzare approfonditamente le celle prodotte per determinare l’effetto della variazione di processi, strutture e materiali, sul rendimento e le proprietà optoelettroniche della cella; Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) Poster alla Summer school di nanotecnologie. Titolo del poster: Experimental Study of the physics of nanostructured organic photovoltaic devices. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 78 Attività formativa Esami sostenuti, ore di lezione e di laboratorio seguite: Formazione in laboratorio all’utilizzo di strumenti di caratterizzazione e fabbricazione celle fotovoltaiche presso laboratorio TASC e Elettra. In particolare: Caratterizzazione: formazione per l’utilizzo autonomo di AFM, SEM, Simulatore solare, diffrattometria RX profilometria e fotoluminescenza. Fabbricazione: formazione su macchinari e nozioni necessarie a deposizione film per spin coating, evaporazione termica a vuoto, sputtering, deposizione elettrochimica; formazione utilizzo pressa per il nanoimpriting, tecniche per il patterning di substrati e celle (attacco chimico e fotolitografia). Trattamenti substrati e celle: formazione per l’utilizzo di forno ossidativo, RIEE, tecniche di pulizia e funzionalizzazione substrati. Congressi, seminari, corsi avanzati e altre attività didattiche passive Attività organizzate dalla scuola di dottorato: Summer school of nanotechnology dal 20 al 23 settembre. Seminario: Matteo Castronovo. The Effect of Confinement on Enzymes Diffusion and Reactions Inside DNA Nanostructures. July 18 2011 Seminario: János Kristóf and Erzsébet Horváth; synthesis and STRUCTURE elucidation of kaolinite organo-complexes Seminar: Dr. Hicham Hmamoudi ‘Self assembled monolayers on gold the challenge’ July 1, 2011 Attività al di fuori della scuola di dottorato: Workshop on New Materials for Renewable Energy 17 - 21 ottobre 2011 (ICTP, Miramare, Trieste, Italy). (36h di seminari, poster session, con certificato di partecipazione). Presentazione: Michael Felsmann, da Gatan, presentazione sulle tecniche EELS, TEM e SAM ed I recenti avanzamenti in queste tecnologie. (1h) Seminario: Serdar Sariciftci on organic photovoltaic at ICTP 13 Aprile (1h) Attività didattica di supporto e attività didattica attiva Studio di articoli scientifici e rewiews riguardanti le celle fotovoltaiche organiche o l’elettronica organica in generale. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 79 MICHELE ROMEO Titolo della tesi: “Sviluppo e applicazione di metodologie DFT e TDDFT per la descrizione di osservabili spettroscopici in sistemi condensati” Supervisore: Prof. GIOVANNA FRONZONI (DSCF) Tutori (eventuali): Attività di ricerca L'adsorbimento di molecole organiche su superfici semiconduttrici ha attratto un'attenzione crescente per la sua importanza nelle tecnologie emergenti. La spettroscopia NEXAFS viene largamente utilizzata per caratterizzare strutture adsorbite su superfici dal momento che permette di investigare i vari modi di adsorbimento così come l'estensione dell'interazione adsorbato-substrato. Computazioni quantistico-chimiche sono importanti per acquisire la maggior parte di informazione dagli esperimenti che sono spesso di difficile interpretazione e razionalizzazione. L'obiettivo principale del progetto è lo sviluppo di uno schema computazionale utile per la simulazione di spettri NEXAFS di molecole adsorbite su superfici nel contesto del design di modelli molecola/superficie ed in quello del calcolo ed interpretazione dei risultati spettroscopici. Durante il primo anno di dottorato è stata condotta una simulazione di spettri NEXAFS di etilene adsorbita su una superficie regolare di Silicio, nella fattispecie Si(100), considerando diverse geometrie di adsorbimento. Un primo step ha riguardato l'implementazione di un codice di interfaccia con ADF (Amsterdam Density Functional code) per il calcolo si spettri NEXAFS risolti angolarmente per date direzioni di polarizzazione della luce incidente secondo l'espressione canonica di calcolo. In un secondo step sono stati ottimizzati modelli di superfici adsorbenti con e senza le molecole di etilene per mezzo di computazioni DFT periodiche su opportuni geometrizzazioni di slab. Sono state considerate entrambe le geometrie di adsorbimento on-top e bridge. Dalle strutture risultanti dal calcolo periodico sono stati estratti razionalmente cluster finiti utili alla successiva computazione degli spettri NEXAFS dell'etilene a livello C1s. Il confronto fra gli spettri risolti angolarmente calcolati e quelli sperimentali è risultato soddisfacente e mette in luce l'evidente potenziale della tecnica computazionale nello studio delle configurazioni di adsorbimento di molecole su superfici. Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) “C K-edge NEXAFS Spectra of Model Systems for C2H4 on Si(100): a DFT Simulation”, contenuti riportati negli “Atti del XXIV Congresso Nazionale della Società Chimica Italiana” per la Divisione Computazionale Attività formativa Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) Marzo - Giugno 2011, Chimica Quantistica, Prof. Mauro Stener, corso specialistico Marzo - Giugno, 2011, Applicazioni Chimiche della Simmetria Molecolare, Prof. Piero Decleva, corso specialistico Congressi, seminari, corsi avanzati e altre attività didattiche passive Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 80 Serie di seminari su Molecular Self-assembling and Nanostructures, 21 Giugno – 15 Luglio, 2011, Trieste Scuola Estiva del FVG su Bioinformatica Strutturale, 4-6 Luglio 2011, SISSA, Trieste Scuola Estiva su Tecniche di Simulazione Atomistiche, 11- 29 Luglio 2011, SISSA, Trieste, (affiliazione CECAM-SISSA) Scuola Estiva di Nanotecnologia 2011, 20-23 Settembre 2011, Scuola di Dottorato in Nanotecnologie, Trieste Workshop su Nanoenergetica, 15-16 Novembre, 2011, ICTP, Trieste Attività didattica di supporto e attività didattica attiva Analisi Matematica, Fisica ed attività di esercitazione per studenti del 1o anno dei corsi fondamentali di Fisica Attività di esercitazione intensiva per studenti del 1o anno dei corsi di STAN e Scienze Geologiche Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 81 SAJID HUSSAIN Title of the thesis: Synthesis of Ordered Semiconductor Nanostructures by Directed Self-Assembly for Photonic Applications Supervisor: GIORGIO BIASIOL Research Activity Silicon mold with 45 - 50nm diameter pillars, with a height of 90nm & period of 300nm have been fabricated using nanoimprint lithography. These molds are used in a second nanoimprint lithography step to pattern the GaAs substrates used for QDs growth. Different nanoimprint & optical resist have been tried, but good surface quality (i.e. RMS surface roughness ≥ 0.2nm) of GaAs substrate after the removal of the resist have been achieved using mr-I 7010E. After hot plate pressing of the mold and resist coated GaAs wafer, there is a very thin residual layer of resist inside the holes underneath of the pillars. This residual layer is etched using oxygen plasma in Inductively Coupled Plasma (ICP) system. These GaAs patterned substrates are chemically etched to get 5060nm dia holes with a 5 – 10nm depth. Different solutions (i.e. HCl:H2O2:H2O & NH4OH:H2O2:H2O) with different dilution have been tried to fabricate these nanopores. Best results have been achieved with HCl:H2O2:H2O solution with a ratio of 1:1:9. Substrate is cleaned using wet chemistry & oxygen plasma in Reactive Ion Etching (RIE) system. Then oxide layer from the patterned GaAs substrate is thinned chemically before its introduction into the Molecular Beam Epitaxy (MBE) System. Silicon molds and patterned GaAs substrates have been analysed using Scanning Electron Microscopy & Atomic Force Microscopy at different stages of the process. Then patterned GaAs substrate is loaded in MBE system for QDs growth. Since thermal removal of the oxide before growth would lead to a disappearance of the holes and to a roughening of the surface. We are testing a method to desorb chemically the oxide through exposure to atomic Ga beams, followed by annealing in As4 and deposition of a thin (<10nm) GaAs buffer before deposition of InAs QDs. Understanding & optimization of the growth kinetics and parameters of QDs growth using MBE System is in process. Objectives for the following year (if applicable) Kinetics and parameters of QDs growth using Molecular Beam Epitaxy System will be studied. All parameters of QDs growth (i.e. Oxide layer removal using Ga flux, annealing, buffer layer thickness, InAs QDs growth) will be optimized using Molecular Beam Epitaxy System. Currently, nanopores on GaAs substrate are being fabricated using wet etching. As an alternative to reduce hole size, dry etching will be used to fabricate these nanopores using RIE/ICP system. Optical characterization of the QDs samples will be done using photoluminescence & microphotoluminescence spectroscopy. Educational Activity Conferences, seminars, advanced courses and other didactic activities Seminar of Dr. HIcham Hmamoudi from Université-Paris Sud on ‘Self assembled monolayers on gold the challenge’ at University of Trieste on July 1, 2011. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 82 Seminar of Matteo Castronovo on ‘The Effect of Confinement on Enzymes Diffusion and Reactions Inside DNA on July 18 2011. The regional Summer school on Nanotechnology 2011 at University of Trieste on 20 -23 September 2011 Support educational activity and teaching Literature study/survey for material selection for QDs fabrication. Research papers/thesis/articles have been studied to carry out the research work. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 83 FRANCESCA SANTESE Titolo della tesi: Modellistica molecolare per materiali e rivestimenti multifunzionali nanostrutturati Supervisore: Prof. Maurizio Fermeglia Tutori (eventuali): Prof.ssa Sabrina Pricl Attività di ricerca Durante il mio primo anno di dottorato ho concentrato la mia attività di ricerca su due progetti principali. Il primo è un progetto europeo, Multhybrids, il cui obiettivo primario era lo sviluppo di una tecnologia innovativa per la preparazione di componenti con nanomateriali multifunzionali; il secondo è un progetto nazionale, Nanostrata, che ha come scopo lo sviluppo di nuovi rivestimenti nanostruttuati per diverse applicazioni industriali. In Multhybrids abbiamo caratterizzato 13 sistemi con nanofillers di diversa natura e forma, puri o modificati con diversi compatibilizzanti, in diverse matrici polimeriche, utilizzando una procedura di modellistica molecolare multiscala sviluppata dal nostro gruppo di ricerca. I risultati ottenuti sono incoraggianti vista l’ottima concordanza dei valori delle proprietà termofisiche calcolate con i corrispetivi dati sperimentali. Inoltre, si è visto che nei sistemi esfoliati le caratteristiche chimico/fisiche dei modificatori non influiscono sulle proprietà macroscopiche, mentre le dimensioni e la forma dei nanofillers hanno un grande impatto sulle proprietà del materiale finale. In Nanostrata abbiamo svolto uno studio sulla bagnabilità di superfici polimeriche con liquidi di diversa natura (acqua, olio, miscela di acqua e sapone) per sviluppare una metodologia che consenta di predire alcune importanti proprietà dell’interfaccia, quali l’angolo di contatto, la tensione superficiale e il lavoro di adesione. La concordanza dei risultati ottenuti con i valori sperimentali disponibili in letteratura ha permesso di convalidare la procedura sviluppata. Si potrà quindi procedere con la progettazione di nuovi rivestimenti andando a modificare le matrici polimeriche con l’aggiunta di nanoparticelle di diversa natura. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa), “Size and shape matter! A multiscale molecular simulation approach to polymer nanocomposites” R. Toth, F. Santese, S. P. Pereira, D. R. Nieto, S. Pricl, M. Fermeglia and P. Posocco, Journal of Material Chemistry, 2011 sottomesso “Contact angles of water and oil on polymer surfaces by MD simulations” F. Santese, D. R. Nieto, P. Posocco, R. Toth, S. Pricl, M. Fermeglia, Chemical Communications, 2011, sottomesso “Water, oil, and surfactant solution on polymer surfaces: converging simulation methods for contact angle determination” F. Santese, D. R. Nieto, P. Posocco, R. Toth, S. Pricl, M. Fermeglia, Journal of Physical Chemistry C, 2011 sottomesso Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) AIChE Annual Meeting 2011, comunicazione: “The Factory of the Future: Integrating Multiscale Modeling and Experiments to Produce New, Better Nanocomposite Materials” M. Fermeglia, P. Posocco, R. Toth, D. R. Nieto, F. Santese and S. Pricl, 24 ottobre 2011 Minneapolis Eurofillers 2011 comunicazione: “Chemistry and shape effects in polymer based nanocomposites: a multiscale modeling study.” M.Fermeglia, P. Posocco, R. Toth, D. Romero, F. Santese, S. Pricl 2122 agosto 2011 Dresden, Germany Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 84 NanotechItaly, comunicazione: “Nanoparticles at large. A multiscale molecular modeling protocol to predict/explain structure-property relationships in nanocomposite systems” P. Posocco, F. Santese, D. R. Nieto, E. Laurini, M. Fermeglia, J. W. Handgraaf, H. G.E.M. Fraaije, M. Lisal, S. Pricl, 23-25 novembre 2011, Venezia NanotechItaly 2011, comunicazione: “Interfacial wettability of polymeric surfaces by oil, water and surfactant/water nanodroplets. A molecular dynamic study” F. Santese, D. R. Nieto P. Posocco, R. Toth, M. Fermeglia, S. Pricl, 23-25 novembre 2011, Venezia Attività formativa Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) 60 ore laboratorio MOSE Scuole AMBER school 3-6 maggio 2011, Barcellona Summer school on Nanotechnology 20-23 settembre, Trieste Congressi, seminari, corsi avanzati e altre attività didattiche passive Congressi VNPCF (V congresso nazionale di chimica farmaceutica) Poster: “The long and winding road of the c-Kit juxtamembrane domain”, 28-30 marzo 2011, Trieste Seminari “Brached Peptides as Therapeutics” Prof. Bracci 21 marzo 2011 “Seminario GPU@UniTS - Processori Grafici & Calcolo Intensivo” 18 febbraio 2011 “New approaches in cancer therapy” Prof. Misiura 12 maggio 2011 “Nanosistemi per il drug e il gene delivery a base di derivati dell’acido aspartico” Prof. Cavallaro 1 giugno 2011 “Self assembled monolayers the challenge” Dr. Hicham Hamoudi 1 luglio 2011 “The effect of confinement on enzyme diffusion and reaction inside DNA nanostructures” Dr. Castronovo 29 luglio 2011 Corsi “Molecular self- assembling and nanostructures”, Prof. Morgante, Casalis, Pasquato Periodo 21 giugno-29 luglio 2011 Altre attività didattiche passive Congresso dottorandi Scuola di Nanotecnologie 17-19 gennaio 2011 Presentazione delle attività scientifiche dei gruppi di ricerca del dipartimento DI3, 25 febbraio 2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 85 LETIZIA TAVAGNACCO Titolo della tesi: Ruolo dell'acqua nel riconoscimento molecolare di bionanostrutture in sistemi alimentari. Supervisore: Prof. Attilio Cesàro Tutori (eventuali): Prof. John W. Brady Attività di ricerca Il tema di questo progetto di dottorato è rivolto alla identificazione di possibili parametri molecolari che controllano la sicurezza e la qualità degli alimenti. Particolare attenzione è rivolta verso l'acqua negli alimenti ed il suo ruolo fondamentale all'interfaccia di superfici biomolecolari. L'obbiettivo generale è ottenere informazioni sulla strutturazione dell'acqua in alimenti tradizionali attraverso l'utilizzo di una varietà di tecniche sperimentali a diversa risoluzione. In questo primo anno di dottorato, si è considerato il sistema caffè, e in particolare la caffeina è stata identificata come molecola modello di studio in quanto costituita da una superficie idrofobica ma solubile in acqua grazie alla presenza di gruppi funzionali capaci di formare legami a idrogeno. Attraverso simulazioni di dinamica molecolare è stato possibile caratterizzare il dettaglio molecolare della strutturazione dell’acqua attorno alla caffeina e l’associazione del soluto in soluzione. In particolare la caffeina si è rivelata un buon sistema perché ha reso possibile il confronto tra risultati computazionali e misure sperimentali e recenti teorie sull’idratazione di soluti idrofobici. Sono inoltre stati condotti esperimenti SAXS su soluzioni acquose di caffeina e preliminari misure AFM. Attraverso simulazioni di dinamica molecolare è stata inoltre valutata l’associazione di biomolecole in soluzione acquosa e in particolare l’interazione della caffeina con zuccheri quali glucosio e saccarosio. Obbiettivi da raggiungere per l’anno successivo (se applicabile) I principali obbiettivi per il seguente anno di dottorato riguardano innanzitutto il completamento degli esperimenti di SAXS e AFM. Successivamente un sistema modello di estesa superficie idrofobica sarà caratterizzato attraverso l’uso di diverse tecniche sperimentali e computazionali. Pubblicazioni su riviste scientifiche (pubblicate oppure in stampa), L. Tavagnacco, P. E. Mason, U. Schnupf, F. Pitici, L. Zhong, M. E. Himmel, M. Crowley, A. Cesàro, J. W. Brady, “Sugar-binding sites on the surface of the carbohydrate-binding module of CBH I from Trichoderma reesei” Carbohydr. Res., 2011, 345(6), 839-846. L. Tavagnacco, U. Schnupf, P. E. Mason, M-L. Saboungi, A. Cesàro, J. W. Brady, “Molecular dynamics simulation studies of caffeine aggregation in aqueous solution”, J. Phys. Chem. B, 2011, 115(37), 10957-10966. J. W. Brady, L. Tavagnacco, L. Ehrlich, M. Chen, U. Schnupf, M. E. Himmel, M-L. Saboungi, A. Ceasàro, “Weakly-hydrated surfaces and the binding interactions of small biological solutes” Eur. BioPhys. J. DOI 10.1007/s00249-011-0776-2 (in stampa). Pubblicazioni/abstracts in conferenze/congressi (nazionali o internazionali) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 86 L. Tavagnacco, A. Cesàro, J. W. Brady, “Thermodynamics of aqueous caffeine self-association: a revisitation”, “10th Mediterranean Conference on Calorimetry and Thermal Analysis MEDICTA 2011”, 24 - 27 Luglio 2011, Porto, Portogallo. Partecipazione a congressi (come relatore) L. Tavagnacco, A. Cesàro, U. Schnupf, P. E. Mason, J. W. Brady, “Hydration and association of biomolecules in aqueous solution”, Studium Conference “Cosmetics and Pharmaceutics: New Trends in Biophysical Approaches”, 14-15 Febbraio 2011, CNRS-Orleans, Francia (presentazione orale). L. Tavagnacco, A. Cesàro, J. W. Brady, “Thermodynamics of aqueous caffeine self-association: a revisitation”, “10th Mediterranean Conference on Calorimetry and Thermal Analysis MEDICTA 2011”, 24 - 27 Luglio 2011, Porto, Portogallo (presentazione orale). L. Tavagnacco, M. Borgogna, J. W. Brady. A. Cesàro, “ How do water molecules probe and control bionanostructures and food functionalities”, Nanotechnology Summer School 2011, 20 – 23 settembre 2011, Trieste (presentazione poster). L. Tavagnacco, M. Borgogna, J. W. Brady. A. Cesàro, “ How do water molecules probe and control bionanostructures: caffeine and sugars”, Studium Conference “Water in biological systems”, 5 – 6 Dicembre 2011, CNRS-Orleans, Francia (presentazione poster). Attività formativa Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea) - “Meccanica Statistica”, Prof. C. Micheletti, 8 novembre 2011 – 28 febbraio 2012, Phd course, Sissa, Trieste. - Laboratorio SAXS, Dr. H. Amenitsch, Elettra, Trieste, marzo – giugno 2011. - Laboratorio AFM, Dr. D. Scaini, Nanolab, Elettra, Trieste, settembre – novembre 2011. Congressi, seminari, corsi avanzati e altre attività didattiche passive Nanotechnology School Congress, 17-19 gennaio 2011, Trieste. Seminario "Synthesis and structure elucidation of kaolinite organo-complexes”, János Kristóf e Erzsébet Horváth, Trieste. Seminario “The Effect of Confinement on Enzymes Diffusion and Reactions Inside DNA Nanostructures”, Matteo Castronovo, Trieste. Corso intensivo "Molecular self-assembling and nanostructures", organizzato dalla Scuola di Nanotecnologie, Trieste. Giornate didattiche 2011 SISN, “Introduzione alle tecniche neutroniche per lo studio microscopico della materia, con applicazioni alla Fisica, Chimica, Biologia e Geologia”, 25 giugno – 5 luglio 2011, Valle Aurina (Bz) – Grenoble (Francia). XI Scuola di Radiazione di sincrotrone , “Radiazione di Sincrotrone: fondamenti, metodi e applicazioni”, 5 – 16 settembre 2011, Castello di Duino, Trieste. Nanotechnology Summer School 2011, 20 – 23 settembre 2011, Trieste. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 87 Attività didattica di supporto e attività didattica attiva Laboratorio di Chimica delle Macromolecole II, corso di laurea magistrale in Chimica, Prof. A. Cesàro (attività didattica di supporto). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 88 SHITAL VAIDYA Title of the thesis: Study of magnetic properties in low dimentionality systems using synchrotron radiation Supervisor: Dr. Roberto Gotter Tutors (if any): Research Activity Measurement of magnetic properties of NiO/Ag antiferomagnetic films by means of x-ray magnetic linear dichroism (XMLD) at the ALOISA beam line of ELETTRA. For the estimation of the dichroism, an accurate set of parameters have been chosen for fitting the Ni L2 edge and then calculating areas under the peaks corresponding to Ni L2 edge. Neel (TN) transition temperature has identified by fitting the dichroism as a function of the temperature by means of power law exponent function for two dimensional systems. Angle resolved Auger photoelectron coincidence spectroscopy (AR-APECS), which is able to disentangle high spin and low spin contribution to the Auger intensity, has been performed below and above TN in order to deepen the sensitivity of the techniques to the local magnetic order. The data analysis for data as acquired by the new experimental set up is under development. In the mean time a subsequent experiment on a prototypical ferromagnetic system, Ni/Cu(001), is going to be prepared with preliminary characterizations for in-situ sample synthesis. Theoretical study has been done by collaborating groups. On one side AR-APECS for ferromagnetic systems has been explained by convoluting DFT ab-initio calculated DOS of majority and minority sub-bands and on another side AR-APECS has been explained by means of atomic-like high-spin and low-spin multiplet terms, for antiferromagnetic systems. On progress experiments aim to join the two findings in a single modelisation, by exploiting the Cini-Sawatzky theory, describing the trend of the Auger spectra from band-like to atomic-like behaviors depending upon the degree of electron correlation of the system (material, dimensionality, size) and to understand why dichroism in AR-APECS, which is related to local electronic structure, disappears above the magnetic transition temperature (indeed it is believed that only long range magnetic order disappear above them). Educational Activity Classes followed (date, course, professor, type of course) Date Course 24/06/2011 Molecular self-assembling Loredana and nanostructures Casalis Corso per dottorato 27/06/2011 Molecular self- assembling Alberto and nanostructures Morgante Corso per dottorato 28/06/2011 Molecular self-assembling Alberto and nanostructures Morgante Corso per dottorato 5/07/2011 Molecular self-assembling Loredana and nanostructures Casalis Corso per dottorato Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 Professor Type of course 89 7/07/2011 Molecular self-assembling Loredana and nanostructures Casalis Corso per dottorato 11/07/2011 Molecular self-assembling Lucia and nanostructures Pasquato Corso per dottorato Molecular self-assembling Lucia and nanostructures Pasquato Corso per dottorato 13/07/2011 Conferences, seminars, advanced courses and other didactic activities 1) XI School on synchrotron radiation: Fundamentals, methods and applications. 5-16 September 2011. 2) Summer school of nanotechnology. 20-23 September 2011. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 90 VIRGILIO FRANCESCA Titolo della tesi: “Sviluppo di sensori elettrochimici mediante processi nanotecnologici per impieghi diagnostici biologici e medici” Supervisore: Massimo Tormena, Paolo Ugob Tutori (eventuali): Mauro Prasciolua a b CNR-IOM, laboratorio TASC, Basovizza SS14 km 163.5, 34149 Trieste; Dipartimento di Scienze Molecolari e Nanosistemi, Unversità Ca’ Foscari di Venezia, Santa Marta 2137, 30123 Venezia. Attività di ricerca La fabbricazione degli array di nanoelettrodi è stata eseguita attraverso la deposizione di un film sottile di polimero (strato isolante) su uno strato di materiale conduttore. Il film polimerico è stato successivamente “patternato”, attraverso litografia elettronica, in modo tale da esporre delle aree, di forma e geometria definita, dello strato conduttore sottostante. Nella prima parte dell’attività di ricerca sono stati quindi valutati i materiali da utilizzare per questo processo di fabbricazione ed è stato svolto il training per l’utilizzo dell’electron beam litography (EBL), presso il laboratorio di microfabbricazione del TASC3. Quindi sono stati ottimizzati i parametri litografici per i materiali selezionati e sono stati ottenuti i primi array di nanoelettrodi. Nell’ultima parte dell’anno gli array ottenuti sono stati caratterizzati elettrochimicamente presso il Laboratorio di sensori per elettroanalisi (LSE)4 attraverso misure di voltammetria ciclica e testati con il label luminoforo Ru(bpy)32+ per valutare l’applicabilità di una strategia di rivelabilità di tipo elettrochemiluminescente. Gli studi preliminari hanno dimostrato che l’ampia finestra di potenziale di questi sistemi può consentire di utilizzare il Ru(bpy)32+ come strategia di rilevamento. La bassa corrente di fondo del BDD (Boron Doped Diamond, materiale conduttore selezionato per la fabbricazione) aggiunto alle proprietà dei NEA e l’elettrocatalisi del sistema Ru(bpy)32+/ammina indicano che questo sistema può essere applicato per lo sviluppo di sensori ad alta sensibilità. Nella fase successiva si prevede di funzionalizzare opportunamente la superficie del polimero/resist (policarbonato) con molecole biologiche per verificare l’applicabilità nel campo di riconoscimento molecolare. Altre pubblicazioni Presentazione Poster durante la Summer School on Nanotechnology Attività formativa Esami sostenuti, ore di lezione e di laboratorio seguite (data, corso, docente, tipo di corso di laurea). Lezioni: 20h Processi elettrodici, primo semestre 05/05/2011–25/05/2011, 3 Laboratorio Nazionale CNR-IOM, S.S. 14 Km 163.5 Basovizza - 34012 Trieste. 4 Dipartimento di Scienze Molecolari e Nanosistemi, Unversità Ca’ Foscari di Venezia, Santa Marta 2137, 30123 Venezia. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 91 Prof. C. Tavagnacco, Corso di Laurea Specialistica in Chimica. Trainings: Scanning Electron Microscopy, dott. Regina Ciancio, Researcher CNR-IOM, TASC Laboratory; Electron Beam Lithography, dott. Mauro Prasciolu, Researcher CNR-IOM, TASC Laboratory. Libri: Yamazaki K. “Electron Beam Direct writing” Nanofabrication Fundamentals and applications Ed. Ampere A. Tseng, Ch.10, 341-376. Moretto L.M. et al. “Templated Ensembles of Nanoelectrodes” Handbook of Electrochemical Nanotechnology vol.1, Ed. Yuehe Lin and Hari Singh Nalwa, Ch.4, 87-105. Reviews: o Chen Y., Pepìn A. “Nanofabrication: Conventional and nonconventional methods” Electrophoresis 22, 2001, 187-207; o Arrigan D.W.M. “Nanoelectrodes, nanoelectrode arrays and their applications” Analyst 129, 2004, 1157-1165; o Richter M.M. “Electrochemiluminescence (ECL)” Chem. Rev. 104, 2004, 3003-3036. Congressi, seminari, corsi avanzati e altre attività didattiche passive “Syntesis and structure elucidation of kaolinite organo-complexes” J. Kistof and E. Horvath; “Virtual private network” M. Fermeglia; 03.05.2001 “Novel Studies in Photoelectrochemistry” H.B. Yildiz, 24.05.2011 “Self assembled Monolayer the challenge” H. Hamoudi, 01.07.2011 FVG Summer School on structural bioinformatics 04-06.07.2011 “The effect of confinement on enzyme diffusion and reaction inside DNA nanostructures” M. Castronovo, 29.07.2011 XI School on Synchrotron Radiation: Fundamentals, Methods and Applications. 0516.09.2011 Summer School on Nanotechnology. 20-23.09.2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 92 Progetti Dottorandi del 27 ciclo: Sono inclusi in questa parte del documento i progetti scientifici dei seguenti dottorandi del 27 cilco: ABDOLLAHZADEH Iman, ANGELONI Valeria, BORIN Daniele, CAPOLLA Sara, CECCHINI Paolo, COCEANO Giovanna, DIOLOSA‘ Marina, ELISEI Elena, FORNASARO Stefano, GANBOLD Tamiraa, IONESCU Andrei Cristian, LOVAT Giacomo, MARSON Domenico, NKOUA Ngavouka Maryse Dadina, OTTAVIANI Giulia, PANIGHEL Mirco, PIANTANIDA Luca, PITTIA Paola, SALGADO Bernardes Pereira Simâo Pedro, SCOTTI Nicola, STOKELJ Tina, STOPAR Alex, TARUSHA Lorena, VEGA Marienette, VENTURELLI Leonardo, WANG Lianqui, ZANNIER Valentina. IMAN ABDOLLAHZADEH Email: [email protected] Laboratory: Ospedale S. Maria della Misericordia, Building No. 13, Udine 33100 Title of the thesis: Mechanical Oscillators for the Study of Normal and Cancer Cells Supervisor: Prof. Giacinto Scoles Tutor: Matteo Castronovo (CRO) Research Activity foreseen State of the art and motivations Cell's function can be determined by its structure. The structural organization of cells is illustrated by certain mechanical properties [7]. It is obvious that cell structure need to be different both in a great number of physiological processes (such as cell differentiation, growth, and adhesion) and under pathogenesis (oxidative stress, attack of viruses, and parasites). Two approaches for the study of cells' mechanical properties allowed that (i) the cell mechanical properties were completely studied, where the cell is a single whole and (ii) mechanical properties of the cell structural components were studied exactly by using isolated lipid bilayers, biomembrane and cytosolic proteins. One of the highly superior approaches to detect the mechanical properties of single cells is by AFM [8]. Its operation is based on the detection of repulsive and/or attractive surface forces. In this method, by interaction between the tip of AFM and the surface of living cells not only in the contact mode, but also in the tapping mode, one can determine cell's properties [9]. To illustrate this fact further, we can mention the estimation of Young's modulus by Mahaffy [10]. Since knowing the internal viscosity of microscopic objects like single cells is vital for understanding the flow of chemicals and a variety of other biomolecular processes, there has been an active search for methods to gauge microviscosity in the science community. For instance, molecular rotors are useful as their rotational freedom and fluorescence emission depend on the viscosity of the media. When a molecular rotor is located within a viscous media, it will occupy a metastable conformation that is highly emissive. When, on the contrarily, it is located in a nonviscous media, the object's degrees of rotational freedom will be maximized and, in turn, its fluorescence emission will be reduced [11]. Nowadays, in order to improve this method using the fluorescence lifetime is more demanded by virtue of this notion that the concentration, the homogeneity, the polarity, and the other factors can have inferior influence on the fluorescence intensity [12, 13]. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 93 Furthermore, the cell's density is another factor that ought to be determined in order to have acceptable consideration of cells mechanical behavior. Recent development of the suspended micromechanical resonator (SMR) has enabled novel label-free biological sensing applications with unprecedented mass resolution (~1 femtogram in a 1 Hz bandwidth) [14]. By weighing each cell in two fluids of different densities, this technique measures the single-cell mass, volume, and density of approximately 500 cells per hour with a density precision of 0.001 g/mL [15]. The use of pillars for the weighing of cells: One of the most innovations to weighing biomolecules is micromechanical pillars by which one can measure the mass of sub-cellular to cells [6]. Detection of proteins at an extremely low concentration (below fM) in a short time is the issue of the biosensors. Improvement can be achieved only by a combination of nanotechnologies for improved sensitivity and new geometries to depreciate the constraints of slow mass transport by diffusion. The pillars, arranged in a super hydrophobic device could provide high sensitivity and absolute quantification and will be able to deal with highly diluted solutions. This micromechanical sensor is based on vertically oscillating beams in which in opposing direction from the other approaches (for example, with oscillating cantilevers) the sensitive and active area is located at the free end of the oscillator. It was showed [16] that a regular matrix of pillars might enforce a super hydrophobic surface and induce a Cassie state. Pillars can be used as mass transfer-based detectors: the adsorption of extra mass causes a change of the resonance frequency. In addition, the extra mass exclusively adsorbs at the free end of the beam. This avoids uncontrolled adsorption on the beam sides, which might cause several harsh effects such as bending. Pillar oscillations can be detected optically. For instance by shining a laser on top of the pillar and detecting the reflected beam. This approach was used to investigate the formation of a single-strand DNA self-assembled monolayer (SAM) on the pillar's topmost surface. The results of this study showed measuring the adsorption of mass of the order of 1.5 fg which corresponds to 7.0x105 DNA molecules and, given the covered area, to a SAM density of 2.8x1011 molecule/cm2 [6]. The measured binding rate was 1000 times faster than the one typically measured on macroscopic surfaces. The latter because the aforementioned, localized adsorption on the pillars heads reduce the volume that the target molecules need to diffuse as to reach the sensing area. In turn, the absorption rate is 3 orders of magnitude faster than on a typical 200x20 square micrometer cantilever. We intend to follow this approach to weigh cells faster than with the existing methods, and more sensitively, as to detect the mass change of these cells in a - biologically speaking - timely manner. Due to the fact that the resolution of this method is about 30 Hz/fg and its resonance frequency is in the range of 4.5-8 MHz, determining the extra mass in the order of pg (cell's mass order) can be available. Therefore, if we have a solution (such as blood) in which cells are suspended, the micromechanical pillars array will evaluates every single cell mass (For instance, we can permit each cell to enter our setup and then we can measure its mass). We aim to evaluate the mass distribution of cells in the blood solution and explore the presence of cancer cells due to their Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 94 higher density and mass. This application can be used to detect circulation tumor cells (CTCs) which will present in the next section. Alternative, optics-based methods for detecting pillars oscillations are photonic crystals. Photonic crystals are an array of periodic holes in a slab which similar to band structure in crystals, have a band structure for photons. The effect of dielectrics as a perturbation factor on the electrical field on the photonic crystal shows that by applying a sharp tip at the top of pillars, photonic crystal will be perturbed [24]. Change in the pillar's mass will ensue to change in the frequency and therefore, in the electrical field on the photonic crystal. Application to detect CTCs: Circulating tumor cells (CTCs) are those that have detached from a primary tumor and circulate in the bloodstream. CTCs may constitute seeds for subsequent growth of additional tumors (metastasis) in different tissues. The detection of CTCs may have important prognostic and therapeutic implications. Unfortunately, given their extremely low amount, these cells are not easy to detect [17]. Circulating tumor cells are found in frequencies in the order of 1-10 CTC per mL of whole blood, in patients with metastatic disease. Such a low frequency implies enrichment methods are crucial towards detecting CTC. Polymerase Chain Reaction (PCR) is one of the powerful approaches to detect CTCs with the identification of tumor cell diluted with 106-l07 normal cells [18, 19]. Diminishing the sensitivity by several tissues and fluids are among this approach's limitation [20]. The most reliable method currently available for CTC detection is automated digital microscopy (ADM) using image analysis for recognition of immunocytochemically labeled tumor cells. ADM, however, is disadvantaged by its very slow scan speeds of 800 cells/sec [21]. To date the most successful of these enrichment approaches is immunomagnetic enrichment (IME) [22]. In most implementations of IME for CTC detection, monoclonal antibodies conjugated to small magnetic beads target the epithelial cell adhesion molecule, EpCAM. The beads are then manipulated in magnetic fields for enrichment. Another method is using fiber-optic array scanning technology (FAST) that can locate CTCs at a rate that is 500-times faster than ADM with comparable sensitivity and improved specificity and, consequently, does not require an enrichment step [23]. We aim to use micromechanical pillars approach to determine CTCs in the bloodstream. Buildings on the hypothesis that the density and the mass of a CTC is higher than the one of a normal cell, pillars could turn into an ideal technology for detecting CTCs relatively timely. About 70% of the cell's mass is made of water or wet mass, whereas the remaining 30% is made of dry mass including Inorganic ions, Miscellaneous, small metabolites, RNA, DNA, Phospholipids, Polysaccharides, and the other lipids. Probably, a tumor cell has greater mass and is denser. Due to and different balance between the aforementioned components. Also, the pillars can be used for studying cells motility. Cells move according to environmental signals. Wound healing, immune response and cancer metastasis are pivotal cell motility-based processes. One can seed cells with dielectric molecules such as plastic, and then stimulate them with of optical tweezers to study their responsive motion. The latter depends on the inner viscosity of cells. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 95 Objectives for the three years The main objective of this project is the application of micromechanical pillars to determine cancer cells by measurement of frequency shift due to the change of the pillar's mass. For this reason, we will use a photonic crystal cavity apparatus to evaluate the effect of frequency change. Given that our pillars will be applied to whole cells that are a-few-microns-large, we need to develop and use pillars larger than those used up until now. Fortunately, the sensitivity of pillars is high enough to determine the difference of mass between normal and cancer cells even if the elastic beams are bigger than those used up until now. To make a perturbation on the photonic crystal, we plan to build a dielectric tip at the top of pillars. In turn, the frequency change in pillars can affect tips, as well, and due to the tiny size of tips, they can apply a perturbation in the electrical field distribution of photonic crystal. Pillars will be Si base and the gold thin layer at the top. We also make the top of pillars super hydrophobic to prevent the cells adhesion from the sides of pillars. The baselines of our work are: - fabrication of micromechanical oscillating pillars for cells detection - fabrication and optimization of photonic crystal cavity in order to have more sensitivity and less leakage especially from the edges. - matching light source with the photonic crystal via optical fibers or waveguides. In the latter, we will fabricate a waveguide based on the photonic crystal structure. - compare our method with the optical fibers as light source approach and show that ours has better sensitivity. - detection normal and cancer cells (CTCs). Objectives for the first year The main line is study of photonic crystal cavities and waveguides as well as fabrication of pillars array and test them for cells adhesion. We hope in the first year to optimize this array for cells. Here are the list of our activity for the first year: - study of photonic crystal cavity and optimization of light matching with that. - Fabrication of Micromechanical Si base with the gold deposition at the top and also fabrication of dielectric tips in order to have perturbation on photonic crystal. Research project 1st year 2nd year 3rd year Study of photonic crystals, light matching, and pillars. fabrication photonic crystal cavity and light matching with less leakage. fabrication of micromechanical pillars and tips using optical fiber method instead of photonic crystal, and comparison these two approach Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 96 test cells, normal and cancer preparation super hydrophobic and gold deposition on pillars. Educational activity foreseen " fast detection of Biomolecules in Diffusion- Limited Regime Using Micromechanical Pillars", By Melli et. al. 2008, Nano Lett. " High Q photonic nanocavity in a two- dimensional photonic crystal", By Akahane. et. al., Nature Photonic, 2003. " Nano- Optomechanical characterization and manipulation of photonic crystal", By Mujumdar et. al., IEEE, 2007. 2nd summer school in nanotechnology in the university of Udine, 2012. 2nd summer school of molecular biomedicine in the University of Udine, 2012. Nanotechnology 1 course, MSc level. Nanocharactrization 1 course, MSc level. Surface Physics and knowledge about superhydrophobicity. Relevant papers and textbooks. References: 1- Arlett, J. L.; Myers, E. B.; Roukes, M. L. Comparative Advantages of Mechanical Biosensors. Nat. Nanotechnol. 2011, 6, 203-215. 2- Yang, Y. T.; Callegari, C.; Feng, X. L.; Ekinci, K. L.; Roukes, M. L. Zeptogram-Scale Nanomechanical Mass Sensing. Nano Lett. 2006, 6, 583-586. 3- von Muhlen, M. G.; Brault, N. D.; Knudsen, S. M.; Jiang, S.; Manalis, S. R. Label-Free Biomarker Sensing in Undiluted Serum with Suspended Microchannel Resonators. Anal. Chem. 2010, 82, 1905-1910. 4- Squires, T. M.; Messinger, R. J.; Manalis, S. R. Making it Stick: Convection, Reaction and Diffusion in Surface-Based Biosensors. Nat. Biotechnol. 2008, 26, 417-426. 5- Thomas C. R.; Stenson J. D.; Zhang Z. Measuring the mechanical properties of single microbial cells. Adv Biochem Eng Biotechnol. 2001, 124, 83-98. 6- Melli M.; Scoles G.; Lazzarino M.: Fast detection of Biomolecules in Diffusion-Limited Regime Using Micromechanical Pillars. Acs Nano. 2011, 5, 10, 7928-7935. 7- Hansma H. G.; Surface Biology of DNA by atomic force microscopy. Annu. Rev. Phys. Chem. 2001, 57, 71-92. 8- Kuznetsova T. G.; Starodubtseva M. N.; Yegorenkov N. I.; Chizhik S. A.; Zhdanov R. I.: Atomic force microscopy probing of cell elasticity. Micron. 2007, 38, 824-833. 9- Mozafari M.R.; Reed C.J.; Rostron C.; Hasirci V.; A review of scanning probe microscopy investigations of liposome-DNA complexes. J. Liposome Res. 2005, 15, 93-107. 10- Mahaffy R.E.; Park S.; Gerde E.; Ka¨s J.; Shih S.K.; Quantitative analysis of the viscoelastic properties of thin regions of ibroblasts using atomic force microscopy. Biophys. J. 2004, 86, 17771793. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 97 11- Kuimova M. K.; Botchway S. W.; Parker A. W.; Balaz M.; Collins H. A.; Anderson H. L.; Suhling K.; Ogilby P. R.: Imaging intracellular viscosity of a single cell during photoinduced cell death. Nat. Chem. 2009, 1, 69-73. 12- Perrin F.: La fluorescence des solutions: induction mole´culaire. Polarisation et dure´e d'emission. Photochimie. Ann. Phys. (Paris) 12, 169-275 (1929). 13- Shinitzky M.; Dianoux A. C.; Gitler C.; Weber G.: Microviscosity and order in the hydrocarbon region of micelles and membranes determined with fluorescent probes. I. Synthetic micelles. Biochemistry 10, 2106-2113 (1971). 14- Burg T. P.; Godin M.; Knudsen S. M.; Shen W.; Carlson G.; Foster J. S.; Babcock K.; Manalis S. R.: Weighing of biomolecules, single cells and single nanoparticles in fluid. Nature, 2007, 446, 1066-1069. 15- Grover W. H.; Bryan A. K.; Diez-Silva M.; Suresh S.; Higgins J. M.; Manalis S. R.: Measuring single-cell density. PNAS. 2011, 1-5. 16- Gentile, F.; Das, G.; Coluccio, M. L.; Mecarini, F.; Accardo, A.; Tirinato, L.; Tallerico, R.; Cojoc, G.; Liberale, C.; Candeloro, P.: Ultra Low Concentrated Molecular Detection Using Super Hydrophobic Surface Based Biophotonic Devices. Microelectron. Eng. 2010, 87, 798-801. 17- Hsieh H. B.; Marrinucci D.; Bethel K.; Curry D. N.; Humphrey M.; Krivacic R. T.; Kroener J.; Kroener L.; Ladanyi A.; x Lazarus A.; Kuhn P.; Bruce R. H.; Nieva J.: High speed detection of circulating tumor cells. Biosensors and Bioelectronics 2006, 21, 1893-1899. 18- Gerhard M.; Juhl H.; Kalthoff H.; Shreiber H.W.; Wagener C.; Neumaier M.: Specific detection of carcinoembryonic antigen- expressing tumor cells in bone marrow aspirates by polymerase chain reaction. J Clin Oncol. 1994, 12725-9. 19- Ghossein R.A.; Scher H.I. Gerald W.L.; Kelley W.K.; Curley T.; Amsterdam A.:Detection of circulating tumor cells in patients with localized and metastatic prostatic carcinoma prostatic carcinoma: clinical implications. Clin Oncol. 1995, 13, 1195-200. 20- Ghossein R. A.; Rosai J.: Polymerase Chain Reaction in the Detection of Micrometastases and Circulating Tumor Cells. CANCER .1996, 78, 10-16. 21- Kraeft S.K.; Ladanyi A.; Galiger K.; Herlitz A.; Sher A.C.; Bergsrud D.E.; Even G.; Brunelle S.; Harris L.; Salgia R.; Dahl T.; Kesterson J.; Chen L.B.: Reliable and sensitive identification of occult tumor cells using the improved rare event imaging system. Clin. Cancer Res. 2004, 10, 3020-3028. 22- Smirnov D.A.; Zweitzig D.R.; Foulk B.W.; Miller M.C.; Doyle G.V.; Pienta K.J.; Meropol N.J.; Weiner L.M.; Cohen S.J.; Moreno J.G.; Connelly M.C.; Terstappen L.W.; O'Hara S.M.: Global gene expression profiling of circulating tumor cells. Cancer Res. 2005, 65, 4993-4997. 23- Rao C.G.; Chianese D.; Doyle G.V.; Miller M.C.; Russell T.; Sanders Jr. R.A.; Terstappen L.W.; Expression of epithelial cell adhesion molecule in carcinoma cells present in blood and primary and metastatic tumors. Int. J. Oncol. 2005, 27, 49-57. 24- C. Jian, J. J. Xiao, and J. P. Huang, Optical Force on Dielectric Nanorods Coupled to a High-Q Photonic Crystal Nanocavity, J. Phys. Chem. C 2009, 113, 17170-17175 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 98 VALERIA ANGELONI Email: [email protected] Laboratory: Department of Medical Sciences, University of Trieste-IOR, Bologna Title of the thesis: Role of collagen cross-linkers on the stability of the bonded interface Supervisor: Prof. Lorenzo Breschi Tutors (if any): Prof. Milena Cadenaro Research Activity foreseen State of the art and motivations The prevention and treatment of tooth decay are major challenges in dentistry. It’s estimated that 90% of adults in Western countries suffer from this dental disease (Beltran-Aguilar ED et al, 2005). The objective of restorative dentistry is to repair and replace damage tooth structures by the application of synthetic materials aiming at the re-establishment of tooth function and aesthetic. Current restorative procedures generally depend on the formation of an adhesive bond between polymeric dental materials and the tooth substrate, enamel and dentin (Pashley et al, 2011). Dentin that represents the bulk majority of the tooth, has a complex composition that is 70% (by weight) mineral, 20% organic component and 10% water (Breschi et al., 2008). Fibrillar type I collagen accounts for 90% of the organic matrix, while the remaining 10% consists of noncollagenous proteins such as phosphoproteins and proteoglycans (Breschi et al., 2008). Type-I collagen is present in tissues as fibrils that are stabilized by lysyloxidase-mediated covalent intermolecular cross-linking (Yamauchi and Shiiba, 2002). In dentin, the etching procedure dissolves the peritubular dentin and dissolves the mineral phase thereby exposing collagen/noncollagenous proteins from the intertubular dentin (Pashley et al., 2011). Adhesive resin is used to embed collagen fibrils and provide micromechanical retention. For effective and durable bonding, therefore, the stability and maintenance of dentin collagen fibrils is critical (Breschi et al., 2008; Lin et al., 2011). In the last years many studies were focused on chemical cross-linkers that have been reported to further stabilize collagen fibrils (Cheung et al., 1990; Ritter et al., 2001; Han et al., 2003; BedranRusso et al, 2007; Cova et al., 2011). Glutaraldehyde (GD) and Proanthocyanidin (PA) are some of the synthetic and a natural collagen crosslinking agents tested. It has been reported that both GD and PA improve the mechanical properties of dentin and the bond strength of dentin-adhesive interface (Bedran-Russo et al, 2007; Cova et al., 2011). Recent findings also reported that endogenous dentin matrix metalloproteinases (MMPs), a class of zinc and calcium dependent endopeptidases, entrapped within the mineralized dentin matrix during tooth development, play a fundamental role in the collagen degradation and aging of the adhesive interface (Pashely et al., 2004; Breschi et al, 2008; Liu et al, 2011). The release and the activation of MMPs during dentin bonding are thought to be responsible for the degradation of collagen fibrils in incompletely infiltrated hybrid layers in aged bonded dentin (Pashley et al, 2004, 2011). Recent studies showed the efficacy of cross-linking agents, as EDC and Riboflavin, in increasing the longevity of resin-dentin bond, supporting the hypothesis that collagen cross-linkers plays a critical role in regulating MMPs’ activity (Al-Ammar et al, 2009; Cova et al, 2011). The aims of this project are: 1) to investigate innovative molecules to induce collagen cross-linking and MMPs inhibition and 2) to develop new dentin bonding systems that incorporating cross-linkers results in improved longevity of the adhesive interface. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 99 References Al-Ammar A, Drummond JL, Bedran-Russo AK. The use of collagen cross-linking agents to enhance dentin bond strength (2009). J Biomed Mater 91:506-11. Bedran-Russo AK, Pereira PN, Duarte WR, et al (2007). Application of crosslinkers to dentin collagen enhances the ultimate tensile strength. J Biomed Mater Res B Appl Biomater 80:268–272. Beltran-Aguilar ED, Barker LK, Canto MT, Dye BA, et al. (2005) Surveillance Summaries 54: MMWR Atlanta, GA: Centers for Disease Control and Prevention; p. 1-13. Breschi, L, Mazzoni A, Ruggeri A et al. (2008). Dental adhesion review: Aging and stability of the bonded interface. Dent Mater 24, 90–101. Cheung DT, Tong D, Perelman N, et al (1990). Mechanism of crosslinking of proteins by glutaraldehyde. IV: In vitro and in vivo stability of a crosslinked collagen matrix. Connect Tissue Res 25:27–34. Cova A, Breschi L, Nato F, et al (2011). Effect of UVA-activated riboflavin on dentin bonding. J Dent Res 90:1439-45. Han B, Jaurequi J, Tang BW, et al (2003). Proanthocyanidin: a natural crosslinking reagent for stabilizing collagen matrices. J Biomed Mater Res A 65:118–124. Liu, Y., Tjaderhane, L., Breschi, L., et al. (2011). Limitations in Bonding to Dentin and Experimental Strategies to Prevent Bond Degradation. J Dent Res 90,953–968. Pashley DH, Tay FR, Breschi L, Tjaderhane L, Carvalho RM, Carillo M et al. (2011). State of the art etch-and-rinse adhesives. Dent Mater 27:1-16. Pashley DH, Tay FR, Yiu C, Hashimoto M, Breschi L, Carvalho RM et al (2004). Collagen degradation by host-derived enzymes during aging. J Dent Res 83:216-21. Ritter AV, Swift EJ Jr, Yamauci M (2001). Effects of phosphoric acid and glutaraldehydeHEMA on dentin collagen. Eur J Oral Sci 109:348–353. Yamauchi M, Shiiba M (2002). Lysine hydroxylation and crosslinking of collagen. Methods Mol Biol 194:277–290. Objectives for the three years Objective of the research project are: 1.to investigate the nanostructure of the dentin collagen with and without the application of collagen cross-linkers agents by means of light, transmission and scanning electron microscopy; 2.to investigate the role of collagen cross-linkers applied to the dentin substrate to stabilize the bond over time and inhibit the endogenous MMPs involved in the degradation collagen fibrils within the hybrid layer created by dentin bonding systems. Objectives for first following year Riboflavin (Vitamin B2) and other natural collagen cross-linkers will be applied to demineralized dentin at different time and concentrations to investigate the dentin morphology and the possible strengthening of the ultimate tensile strength of the dentin organic matrix. Dentin proteins will be then extracted for zymographic assays in order to assay the MMPs activity. Research project Testing materials: - Microtensile bond strength test; - Zymographic analysis; - Light microscopy (LM); Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 100 - Transmission electron microscopy (TEM); - Scanning electron microscopy (SEM). Educational activity foreseen - Participation to national and international meetings on dental materials; - Frequency of research laboratories at the Istituto Ortopedico Rizzoli in Bologna and at the University of Trieste; - Study of published papers on collagen cross-linkers agents. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 101 DANIELE BORIN Email: [email protected], [email protected] Laboratory: IOM-CNR at AREA SCIENCE PARK - Basovizza Title of the thesis: Micro-mechanical oscillators for biochemical applications Supervisor(s): Dr. Marco Lazzarino Tutors (if any): Dr. Giuseppe Toffoli Prof. Giacinto Scoles Research Activity foreseen State of the art and motivations Proteomic analysis is playing a growing role in diagnostic, because protein expression and proteinprotein interactions could give important information in real time about physiological processes and hence about patient’s health [S.M. Hanash et al., Nat.Rev.Clin.Oncol., 2011]. For this reason, monitoring the expression level of protein, especially those that have been recognized as diagnostically relevant, in real time and on a single patient basis, could represent a tool for early diagnosis of diseases. In addition, high sensitivity of detection (down to the pico/femtomolar level of most of the biomarkers of interest), high specificity (to detect biomolecules in a medium of other species with much higher concentration), low cost and low amount of sample requirement are certainly important features for any diagnostic tool to be developed. Nanotechnological research is giving continuously growing effort to this field, for example through the application of micro/nano electromechanical systems (MEMS/NEMS) to biological and biomedical field. In the last years, micro-resonating sensors have achieved a large diffusion because of their great sensitivity and versatility [R. Bashir, Advanced Drug Delivery Reviews, 2004]. Typically, the shift in the resonance frequency induced by the mass of adsorbed analyte is measured, with resolution down to the zeptogram (zg) range [Y.T. Yang et al., Nano Letters, 2006]. Unfortunately, these performances degrades strongly in liquid environment, due to the damping effect of the viscous media. To overcome this limit, mainly two different approaches have been so far proposed in literature: the dip&dry approach, where the sensor is in contact with the liquid sample, then dried and measured in vacuum, or the microchannel approach [T. Burg et al., Nature, 2007], where the liquid can flow within the resonator, that externally can oscillate in vacuum. Unfortunately, both of them result to be very complex in fabrication and/or in operational procedures. As an alternative approach, the pillar technology has been developed by Mauro Melli during his PhD thesis, in Marco Lazzarino and Giacinto Scoles’ group [M. Melli et al., Microel. Eng., 2010]. Pillars are vertical oscillating beams, in which the sensitive area is located at the free end of the sensor. This geometry, compared to what is done in cantilever technology, has two main advantages: the first is that adsorption is confined to a small spot, surrounded by a much larger area with no adsorption of the analyte of interest. This means an increased rate of adsorption compared to “larger” flat surfaces, as demonstrated studying the kinetics of DNA self assembled monolayer (SAM) formation and the hybridization efficiency on top of pillars [M. Melli et al., ACS nano, 2011]. The binding rate is 1000 times higher than on a “macroscopic” surface, while the Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 102 hybridization of a SAM of DNA with maximum density is 40%, 4 times the value reported in the literature [Georgiadis R. et al., JACS, 2000]. This allows to reduce the time of exposure to the analyte to get a detectable shift in resonance frequency. In addition, due to their geometry, pillars can be organized in very dense arrays that, if properly treated to make them hydrophobic, lead to a superhydrophobic effect: the solution droplet is in contact only with the top surface of pillars, without wetting the lateral walls or the ground of the array. In these conditions, the damping experienced by the pillars in a liquid environment is dominated by the air friction on the pillars walls and thus is equivalent to the damping in air. These results pave the way toward the design of a new class of BioMEMS operating in liquid and in real time. This sensor can also be integrated into a microfluidic circuit to deliver the reagents for the functionalization of pillars, the rinsing liquids and the sample to be analyzed. Objectives for the three years The main goal of my research activity is to make possible recognition and quantification of protein biomarkers using the pillars technology, possibly in a liquid environment. In addition, detecting different biomarkers in parallel can be helpful to obtain a better diagnosis about the patient health state and to reduce the possibilities of false positives. To obtain this, is necessary to: build a fluidic cell to allow measurements in liquid and improve the existing setup to detect oscillations in liquid; develop a microfluidic circuit to deliver reagents, rinsing liquids and the sample to be analyzed to the pillar matrix; develop a method and a protocol to functionalize the top surface of pillars with different biomolecules (antibodies, aptamers) for recognition of different biomarkers in parallel; verify the effective binding of the right antigen to the right pillar and the absence of aspecific absorption. Objectives for the first year In the first year of activity, measurement of resonance frequency shift of pillars due to molecular absorption in a liquid environment should be performed. This means: optimize the existing protocol to make the matrix superhydrophobic maintaining a good Quality factor of the resonator; develop a fluidic chamber in which the pillar matrix will be placed and actuated; improve the actual experimental setup to detect pillars oscillation in liquid. We would also like to increase the actual limit of detection of pillars, that so far is around 10pM for streptavidin: to reach this target, we plan to use biotinilated nanoparticles to amplify the resonance frequency shift. In this way, detection of streptavidin immobilized to biotinilated pillars should be possible also from solutions with very low concentration (sub-pM). In the end of the first year, we would start to consider the different approaches available to functionalize groups of pillars of the same matrix with different antibodies or aptamers. Research project Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 103 The first part of the project will be focused on measurement of resonance frequency of pillars in liquid environment. The tasks are to optimize the hydrophobization procedure of pillars, develop a fluidic chamber and improve the setup to detect oscillations in liquid. Pillars will be fabricated using electron beam lithography, developing processes, e-beam evaporation, inductively coupled plasma etching processes and hydrophobization processes. All the fabrication procedure will be performed at the IOM-CNR laboratories. The liquid cell will be made of glass, polydimethylsiloxane and polymethylmethacrylate, that can be cut in the desired shape by means of a CO2 laser cutter also available at IOM-CNR. Bio-recognition on top of the pillars will be tested initially exploiting the biotin-streptavidin interaction: a biotinilated SAM will be created on a gold layer at the free end of pillars, then the matrix will be exposed to a solution of streptavidin and, subsequently, to a solution of biotinilated gold nanoparticles (that could be produced by Meneghetti’s group in Padua), measuring the progressive reduction of the resonance frequency. This step is preliminary to the use of more complex systems, like antibodies (Abs) or aptamers. In the final goal of the project, different antibodies should be patterned into different groups of pillars, to analyze several biomarkers involved in the same disease (for example, prostate cancer or colorectal cancer) in parallel. To obtain this, different approaches could be used: one could use the DNA directed immobilization (DDI) technique to bind antibodies conjugated with a DNA-oligo to a SAM of the complementary DNA sequence on top of the pillars; alternatively, direct immobilization of binding molecules to pillars could be used. For this target, different techniques could be considered: photochemistry, supramolecular nanostamping, microspotting or laser nanografting. The best approach will be evaluated in terms of feasibility and efficacy of functionalization. For this target, a collaboration with other groups could be necessary to develop the method and the protocol to functionalize the pillar matrix. To test the specificity of binding, preliminary studies could be made on a small and flat surface of silicon covered with gold, in which different patches of Abs or aptamers are patterned with one of the previously reported methods. After exposure with a solution of a specific antigen per time, the specific binding could be evaluated via Atomic Force Microscopy (AFM) or with fluorescence methods, to check the antigen immobilization only on the specific area. After that, complex solutions with other proteins could be used, to check the binding specificity of immobilized biomolecules and the absence of aspecific adsorption. Once this system will be developed, it should be validated at first with solutions of one or some proteins to check the specificity of binding of the sensor, and then with complex solution of the most abundant proteins (e.g. albumin) present in the human plasma, to evaluate the absence of aspecific adsorption. After these preliminary tests, samples of human plasma will be used in collaboration with the Centro di Riferimento Oncologico (CRO) in Aviano (ref. Dr. Toffoli) directly or after preliminary purification steps. The activities and their time scheduling are showed in the following Gantt chart: Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 104 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Pillars fabrication and hydrophobization Fluidic cell development 1 Measurement in liquid with biotin-STV complex Study of site-specific functionalization of pillars Site-specific immobilization of antibodies/aptamers on pillars Preliminary tests on flat surface for binding 2 specificity Preliminary tests on pillars Validation of the sensor 3 Development toward a point-of-care diagnostic tool Educational activity foreseen In the first year of this project I’m learning to use the Labview software, that will be useful in my project to use and control different kind of instrumentation by computer (network analyzer, oscilloscopes, motor-driven micro-positioning systems, micro-syringe pumps, etc. ) that can be used for optical measurement and functionalization of pillars in an automatic way. I’ve already attended the base course, held by Prof. Giuseppe Cautero and Dr. Dario Giuressi in March at Elettra (20 hours of frontal lectures and exercises), while the advanced course will be held in September (20 hours). I’ve already attended the preparatory school and the “Winter College on Optics: advances in Nanooptics and plasmonics”, held at ICTP from the 30th Jan 2012 to the 3rd Feb 2012 and from the 6th Feb 2012 to the 17th Feb 2012, to get more in contact with the laser and the optics that I’m using in the experimental setup. Self assembled monolayer (SAM) formation will be involved in my project, because creation of SAM of biomolecules for detection and of inert bio-compatible polymers to avoid aspecific adsorption is a tool for protein recognition and immobilization on top of the pillars: that’s why I’m considering to attend the course about molecular self-assembling and nanostructures held by Prof. Alberto Morgante, Prof. Loredana Casalis and Prof. Lucia Pasquato (about 20 hours). I’m looking also for courses about chemical biofunctionalization and protein binding, if will be organized at university or at Sissa. In the meantime, I’m studying the book edited by R. Förch, H. Schönherr and A.T.A. Jenkins, “Surface Design: Application in Bioscience and Nanotechnology”, Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 105 WILEY-VCH, 2009, with particular attention to the tutorials about biosensors and surface treatments (pages 3-99), modification of surfaces by photosensitive silanes (pages 207-219) and the properties of nanoparticles at the interface with planar surfaces (pages 323-338), that are topics of great importance in my project. I would be also interested in attending the course held by Prof. Mario Grassi about mathematical modeling in bio-pharmaceutics, for the part about the diffusion coefficient measurements, and because I’m interested in the connection between chemical engineering and bio-pharmaceutical field, considering my university background. Regarding conferences, I’m going to participate to a workshop on “Nanotechnology for health care”, that is taking place in Trento the 25th-26th of May, and to the EMBL conference “Microfluidics 2012” in Heidelberg (Germany) from the 25th to the 27th of July 2012. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 106 SARA CAPOLLA Email: [email protected] Laboratory: Università degli Studi di Trieste Title of the thesis: Use of immune-nanoparticles containing chemotherapeutic agents for the treatment of tumors. Supervisor: Dr. Paolo Macor Tutors (if any): Research Activity foreseen State of the art and motivations Cancer treatment comprehends different types of therapies, including surgical therapy, radiotherapy and chemotherapy. Despite their ability to attack and damage cancer cells, they also affect healthy cells, creating high toxicity levels. Thus, the development of molecularly targeted therapies has emerged as one approach to overcome this lack of specificity (Cho et al., 2008). In the last 40 years the attention has been focused on the “immunotherapy” which is characterized by the development of monoclonal antibodies which can be used in a large variety of diseases, including cancer (Chan and Carter, 2010). This treatment is based on the antibodies capability to bind with high specificity one particular antigen which can be selectively expressed at high levels on the surface of cancer cells leading to lower side effects on healthy cells and lower systemic toxicity (Jaffee, 1999). Moreover, anti-tumor antibodies can be linked to therapeutic delivery vehicles including nanoparticles inducing a specific homing in tumor cells. The attention has been focused on the development of these vehicles because of their small size (100-300nm) favorable for endocytic intracellular uptake, high drug loading and tumor specific targeting. Furthermore, they might be composed on a large variety of materials, with a particular interest on the development of biodegradable nanopaticles (BNPs) because of their ability to maintain drug concentrations at therapeutically relevant levels for a longer period of time (Vasir and Labhasetwar, 2007). For this PhD project two different types of immune biodegradable nanoparticles will be used: Nanoparticles conjugated with selected, produced and characterized anti-CD162 antibodies and filled with chemotherapeutic agents for the treatment of T-cell cancers. CD162 is a marker for the recognition of anaplastic T-cells and preliminary results obtained in collaboration with Dr. Claudio Tripodo (Università di Palermo) demonstrate also its correlation to tumor aggressiveness. The creation and validation of these vehicles could represent an alternative to chemotherapy used to treat this disease. Nanoparticles conjugated with Rituximab (anti-CD20 antibody) and filled with two different contrast mediums, Magnevist and ProHance, for the diagnosis of B-cell cancers. Their high expression of CD20 on the surface and the use of nanoparticles conjugated with an antibody able to recognize this antigen permits a selective binding and homing of BNPs on cancer cells. Thus, the creation and validation of these vehicles could represent an alternative to the commonly used diagnostic tests. The same approach used for the diagnosis of cancer B-cells will be performed for T-cells cancer, after the creation of nanoparticles conjugated with anti-CD162 antibodies and filled with contrast mediums. REFERENCES Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 107 Chan, A. C. and P. J. Carter (2010). "Therapeutic antibodies for autoimmunity and inflammation." Nat Rev Immunol 10(5): 301-16. Cho, K., X. Wang, S. Nie, Z. G. Chen and D. M. Shin (2008). "Therapeutic nanoparticles for drug delivery in cancer." Clin Cancer Res 14(5): 1310-6. Jaffee, E. (1999). "Immunotherapy of cancer." Annals of the New York Academy of Science 886(1): 67-72. Vasir, J. K. and V. Labhasetwar (2007). "Biodegradable nanoparticles for cytosolic delivery of therapeutics." Adv Drug Deliv Rev 59(8): 718-28. Objectives for the three years This PhD project is divided into two main parts, both focused on the use of immune biodegradable nanoparticles. One part of the project concerns the in vitro and in vivo characterization of previously selected and produced anti-CD162 antibodies. in vitro and in vivo characterization of selected antibodies: a) biochemical characterization through ELISA and BIACORE analysis; b) in vitro characterization to evaluate antibodies' binding capability on different cancer Tcell lines and cells derived from patients. Evaluation of their ability to induce apoptosis, complement-dependent cytotoxicicity (CDC), antibody-dependent cell-mediated cytotoxicity (ADCC) and effects on the adhesion on endothelial cells; c) in vivo imaging: intraperitoneal and intravenous injection of selected human anti-CD162 antibodies in a T-cell cancer mouse model. Evaluation of antibodies’ biodistribution; creation of immune biodegradable nanoparticles conjugated with anti-CD162 antibodies, filled with chemotherapeutic agents and tested both in vitro and in vivo; a) in vitro characterization of the nanoparticles binding capability and cytotoxic effects (apoptosis) on cancer T-cell lines, cells derived from patients and other cell lines used as negative control; b) in vivo characterization of nanoparticles after intraperitoneal and intravenous injections through in vivo imaging techniques. The other part of the project concerns the evaluation of the diagnostic power of nanoparticles which contain two contrast mediums (ProHance and Magnevist) through in vitro and in vivo tests. The use of nanoparticles could be useful for the diagnosis of B-cell cancers, because of the presence of Rituximab, a monoclonal antibody able to bind with high specificity an antigen known as CD20, highly expressed on the surface of cancer B-cells. This part of the project will be performed through different steps: Evaluation of the nanoparticles binding on lymphoma B-cell lines (MEC-a and BJAB), CD20low cells (negative control) and cells isolated from patients by FACS analysis, electron and confocal microscopy; Evaluation of the nanoparticles biodistribution through in vivo imaging assays; Evaluation of the magnetic resonance power both in vitro and in vivo. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 108 The same tests used for the characterization of CD20-BNPs will be performed for anti-CD162BNPs, filled with contrast medium. Objectives for the first year For what concerns the treatment of T-cell cancers, the objectives for the first PhD year comprehend: in vitro characterization of selected and produced anti-CD162 antibodies with ELISA and BiaCORE analysis; evaluation of antibodies' binding capability on different cancer T-cell lines and cells derived from patients and of apoptosis, complement-dependent cytotoxicicity (CDC) and antibodydependent cell-mediated cytotoxicity (ADCC) induction; Creation and preliminary validation of BNPs conjugated with anti-CD162 antibodies and filled with chemotherapeutic agents through in vivo experiments; In vitro characterization of BNPs (filled with contrast medium) binding, apoptosis, CDC and ADCC induction on CD20high, CD20low and cells derived from patients; In vivo and ex vivo characterization of CD20-BNPs toxicity in healthy mice Creation and preliminary validation of CD162-BNPs (filled with contrast medium) binding on CD162high, CD162low and cells derived from patients. Research project The work plan will span over 3 years and is structured in 6 interrelated tasks that are individually described below. Tasks sequentially exemplify the research strategy into developing and validating a number of possible therapeutic antibodies. GANTT DIAGRAM 3 6 9 12 15 18 21 24 27 30 33 36 TASK-1 TASK-2 TASK-3 TASK-4 TASK-5 TASK-6 TASK1 Biochemical characterization of selected and produced anti-CD162 human recombinant antibodies (months 1-6) Task 1.1 Epitope mapping The epitope binding site will be mapped. Random fragmentation and ORF filtering recombinant fragments covering the PSGL-1 N-terminal domain will be produced. Selected anti-CD162 antibodies will be tested for their ability to recognize these fragments by ELISA and Western Blot identifying the minimal epitope recognized. Task 1.2 Biochemical characterization of recombinant antibodies Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 109 Isolated human recombinant antibodies will be tested for their specificity and affinity binding by ELISA and BIAcore analysis respectively. Recombinant form of the PSGL-1 N-terminal portion will be used in coating and in adsorption for the ELISA and BIAcore analysis respectively. Moreover, the human recombinant antibodies will be tested for their ability to prevent the interaction between adhered HUVEC cells and fluorescent-marked tumor cells. TASK 2 Functional activity of anti-PSGL-1 antibodies on T-lymphoma cell lines (months 2-9) Task 2.1 Apoptosis induction on lymphoma cell lines and cells isolated from patients Apoptosis induction will be performed using T-lymphoma cell lines already provided Prof. Giorgio Inghirami (University of Torino). Three human ALCL cell lines (SU-DHL, TS and JB6) and the PTCL cell line (MAC1) will be incubated with human recombinant antibodies for 48 hours at 37°C. Apoptotic cells will be than tested with the MTT assay, by Annexin V/PI staining and evaluating the PARP/Syk expression by Western Blot analysis. Task 2.2 Complement-dependent cytotoxicity evaluation on lymphoma cell lines and cells isolated from patients Complement-dependent cytotoxicity will be evaluated using lymphoma cell lines and cells isolated from patients which will be incubated with human anti-CD162 antibodies and normal human serum for 1 hour at 37°C. Residual viable cells will be measured using MTT assay. Task 2.3 ADCC mediated by recombinant antibodies ADCC will be performed using labeled lymphoma cells and cells isolated from patients which will be incubated with human recombinant antibodies and human PBMC. Fluorescent residual viable cells will be measured after 7 or 24 hours at 37°C. Task 2.4 Inhibition of PSGL-1 activity T cells are able to adhere to stimulated human endothelial cells via CD162. DID-labeled human T cell lines will be incubated with a monolayer of LPS-activated HUVEC in the presence or in the absence of the recombinant anti-PSGL-1 antibodies. Fluorescence analysis after cell washing will provide evidence of T cell adhesion. TASK 3 Creation and preliminary in vitro validation of immune anti-CD162 BNPs effects (months 8-14) Task 5.1 Creation and characterization of BNPs Different types of nanoparticles will be created: - BNP0 which will be not conjugated with anti-CD162 antibodies and do not contain chemotherapeutic agents; - BNP1 which are conjugated with anti-CD162 antibodies but do not contain chemotherapeutic agents and - BNP2 which are both conjugated with antibodies and contain chemotherapeutic agents. Task 3.2 Evaluation of BNP0, BNP1 and BNP2 binding and effects on cancer T-cell lines, cells isolated from patients and CD162neg cells Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 110 Cancer T-cell lines and CD162neg cells, used as negative control, will be incubated with different amount of Cy5.5 labeled BNPs for different time. Fixed cells will be analyzed first by flow cytometry, fluorescence microscope and than using confocal microscope in order to evaluate BNPs binding on and internalization in tumor cells. Task 3.3 Apoptosis induction on lymphoma cell lines, cells isolated from patients and CD162neg cells. Apoptosis induction will be performed using T-lymphoma cell lines, cells isolated from patients and CD162neg cells which will be incubated with human recombinant antibodies for 48 hours at 37°C. Apoptotic cells will be than tested with the MTT assay, by Annexin V/PI staining and evaluating the PARP/Syk expression by Western Blot analysis. TASK 4 Development of a human/SCID model of lymphoma (months 12-20) Task 4.1 Injection of T-cell lymphoma cell lines in SCID mice Five different lymphoma cell lines will be labeled with near infrared probe and injected i.p. and i.v. in SCID mice 24 hours after an intraperitoneal treatment with cyclophosphamide. The technology of time domain optical imaging will be used to follow tumor cell distribution and tumor development in anesthetized animals; residual fluorescence will be also confirmed by ex-vivo analysis of tumor mass and mouse organs. Animals will also be analyzed for their survival and the progression of tumor model will be analyzed by histological and immunohistochemical studies in order to monitor the expression of PSGL-1 and T-cell lymphoma markers. TASK 5 Evaluation of anti-CD162-BNPs toxicity (months 20-26) Task 5.1 In vivo analysis of the effects BNPs injection in healthy mice Increasing amount of BNP0, BNP1 and BNP2 or chemotherapeutic agent (as a control) will be injected i.p. in C57/Bl healthy mice. Animals will be followed for 2 weeks and their total body weight and the survival will be analyzed. Task 5.2 Ex vivo analysis of BNPs injection in healthy mice Mouse organs will be collected 2 weeks after the end of the treatment with BNP0, BNP 1 and BNP2 or chemotherapeutic agents alone (as a control). Heart, brain, kidney, lung, spleen, liver morphology will be evaluated. Task 6 Evaluation of anti-CD162-BNPs effect in T-cell cancer mouse model (months 27-36) Task 6.1 Analysis of BNPs distribution in lymphoma bearing mice Cy5.5-labelled BNP0, BNP1 and BNP2 (maximal tolerated dose obtained from task 5) will be injected i.p. in mice showing peritoneal tumor mass; animals will be sacrificed after 1, 2, 3, 4, 5, 6, 7 days. Task 6.2 Ex vivo analysis of mice tissues. Tumor mass, heart, brain, kidney, lung, spleen, liver and lymph nodes collected from BNP0 and BNP1-treated animals will be analyzed using fluorescence microscope and confocal microscope in Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 111 order to visualize CY5.5 fluorescence. Tissues morphology of BNP2-treated animals will be analyzed in order to evaluated tumor infiltrates and cytotoxic effects of BNP2 (necrotic areas). Task 6.3 Analysis of the BNPs effect in the treatment of T-cell cancer model BNP0, BNP1 and BNP2 (maximal tolerated dose obtained from task 5) or chemotherapeutic agents alone (as a control) will be injected i.p. in tumor-bearing mice starting 4 days after T-cell line injection. Animals will be followed for 120 days and analyzed for their survival. Ex vivo analysis of the effect of BNPs treatment. Tumor mass, heart, brain, kidney, lung, spleen, liver and lymph nodes collected from treated animals will be analyzed by immunohistochemistry in order to visualize human lymphoma cells. For what concerns the characterization of anti-CD20-BNPs filled with contrast medium, the work plan will span over 3 years and is structured in 5 interrelated tasks that are individually described below. Tasks sequentially exemplify the research strategy into developing and validating a number of possible therapeutic antibodies. GANTT DIAGRAM 3 6 9 12 15 18 21 24 27 30 33 36 TASK-1 TASK-2 TASK-3 TASK-4 TASK-5 TASK 1 Prelilminary in vitro evaluation of anti-CD20-BNPs binding (months 1-6) Task 1.1 Binding on CD20high, CD20low and cells derived from patients To test BNPs binding capability, they will be labeled with Cy5.5 and incubated with different cancer B-cells, CD20low cells and cells derived from patients. Fixed cells will be analyzed first by flow cytometry, fluorescence microscope and than using confocal microscope in order to evaluate BNPs binding on and internalization in tumor cells. Task 1.2 In vitro apoptosis induction Apoptosis induction will be performed using B-lymphoma cell lines (MEC-1 and BJAB) which will be incubated with different amount of BNPs for 48 hours at 37°C. Apoptotic cells will be than tested with the MTT assay, by Annexin V/PI staining and evaluating the PARP/Syk expression by Western Blot analysis. For these tests, BNP0 (BNP without both contrast medium and anti-CD20 antibody), BNP1 (with only anti-CD20 antibody) and BNP2 (with both contrast medium and antiCD20 antibody) will be used. TASK 2 Evaluation of anti-CD20-BNPs toxicity (months 6-12) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 112 Task 2.1 In vivo analysis of anti-CD20-BNPs effects after injection in healthy mice Increasing amount of BNP0, BNP1 and BNP2 will be injected i.p. in C57/Bl healthy mice. Animals will be followed for 2 weeks and their total body weight and the survival will be analyzed. Task 2.2 Ex vivo analysis of BNPs injection in healthy mice Mouse organs will be collected 2 weeks after the end of the incubation with BNP0, BNP 1 and BNP2 or contrast medium (as a control). Heart, brain, kidney, lung, spleen, liver morphology will be evaluated. Task 3 Evaluation of BNPs effect in B-cell cancer mouse model (months 13-20) Task 3.1 Analysis of BNPs distribution in lymphoma bearing mice Cy5.5-labelled BNP0, BNP1 and BNP2 will be injected i.p. in mice showing peritoneal tumor mass; animals will be sacrificed after 1, 2, 3, 4, 5, 6, 7 days. Task 3.2 Ex vivo analysis of mice tissues. Tumor mass, heart, brain, kidney, lung, spleen, liver and lymph nodes collected from BNP0 and BNP1-treated animals will be analyzed using fluorescence microscope and confocal microscope in order to visualize CY5.5 fluorescence. Tissues morphology of BNP2-treated animals will be analyzed in order to evaluated tumor infiltrates and cytotoxic effects of BNP2 (necrotic areas). Task 3.3 Analysis of the BNPs effect in the treatment of T-cell cancer model BNP0, BNP1 and BNP2 or chemotherapeutic agents (as a control) will be injected i.p. in tumorbearing mice starting 4 days after T-cell line injection. Animals will be followed for 120 days and analyzed for their survival. Ex vivo analysis of the effect of BNPs treatment. Tumor mass, heart, brain, kidney, lung, spleen, liver and lymph nodes collected from treated animals will be analysed by immunohistochemistry in order to visualize human lymphoma cells. Task 4 Creation and preliminary in vitro validation of anti-CD162-BNPs filled with contrast medium (20-26) Task 4.1 Creation of anti-CD162-BNPs filled with contrast medium Different types of nanoparticles will be created: - BNP0 which will be not conjugated with anti-CD162 antibodies and do not contain contrast medium; - BNP1 which are conjugated with anti-CD162 antibodies but do not contain contrast medium and - BNP2 which are both conjugated with antibodies and contain contrast medium. Task 4.2 Evaluation of BNP0, BNP1 and BNP2 binding and effects on cancer T-cell lines, cells isolated from patients and CD162neg cells Cancer T-cell lines and CD162neg cells, used as negative control, will be incubated with different amount of Cy5.5 labeled BNPs for different time. Fixed cells will be analyzed first by flow cytometry, fluorescence microscope and than using confocal microscope in order to evaluate BNPs binding on and internalization in tumor cells. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 113 Task 4.3 Apoptosis induction on lymphoma cell lines, cells isolated from patients and CD162neg cells. Apoptosis induction will be performed using T-lymphoma cell lines. Three human ALCL cell lines (SU-DHL, TS and JB6) and the PTCL cell line (MAC1) will be incubated with nanoparticles for 48 hours at 37°C. Apoptotic cells will be than tested with the MTT assay. TASK 5 Evaluation of anti-CD162-BNPs toxicity (months 27-36) Task 5.1 In vivo analysis of the effects BNPs injection in healthy mice Increasing amount of BNP0, BNP1 and BNP2 or contrast agent (as a control) will be injected i.p. in C57/Bl healthy mice. Animals will be followed for several weeks and magnetic resonance analysis will be performed. Task 5.2 Analysis of BNPs bio-distribution in lymphoma bearing mice Labelled BNP0, BNP1 and BNP2 (maximal tolerated dose obtained from task 5.1) will be injected i.p. in mice showing peritoneal tumor mass and they will be analyzed through an in vivo imaging approach. Task 5.3 Ex vivo analysis of mice tissues Tumor mass, heart, brain, kidney, lung, spleen, liver and lymph nodes collected from BNP0 and BNP1-treated animals will be analyzed using fluorescence microscope and confocal microscope in order to visualize CY5.5 fluorescence. Tissues morphology of BNP2-treated animals will be analyzed in order to evaluated tumor homing and eventual cytotoxic effects of BNP2 (necrotic areas). Task 5.4 Magnetic resonance analysis on mouse model BNP0, BNP1 and BNP2 (maximal tolerated dose obtained from task 5.1) or contrast medium (as a control) will be injected i.p. in tumor-bearing mice after T-cell line injection. Animals will be tested through magnetic resonance. Educational activity foreseen During the first year, two trainings about in vitro and in vivo techniques will be performed. The first training will be focused on FACS (Fluorescence-Activated Cell Sorting) analysis, a technique which permits the evaluation of the expression of antigens on the surface of cells using antibodies conjugated with fluorescent dyes. This training will be performed at C.R.O situated in Aviano. The second training will be focused on in vivo imaging techniques which permit the evaluation of biodistribution of antibodies and nanoparticles in mice. An another training about isolation, production, characterization and engineering of antibodies will be performed in Los Alamos at the laboratory of Professor Andrew Bradbury. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 114 PAOLO CECCHINI Email: [email protected]; [email protected] Laboratory: Title of the thesis: Analysis and implementation of glaucoma filtration devices in glaucoma surgery Supervisor: Prof . Daniele Tognetto Tutors (if any): Research Activity foreseen State of the art and motivations Glaucoma is a degenerative pathology of the optic nerve, leading to the loss of the optic nerve fibers along with irreversible visual field damage. Glaucoma may eventually cause blindness if not treated. The most frequent type of glaucoma is the primary open angle glaucoma. Briefly, in the anterior segment of the eye the ciliary body produces the so called aqueous humor, which maintains the intraocular pressure in a range between 10 and 20 mmHg. The aqueous humor is drained out of the eye through a structure called trabecular meshwork. In primary open angle glaucoma, the trabecular meshwork impedes the normal flow of the aqueous out of the eye, inducing a pathological increase in the intraocular pressure. A high intraocular pressure causes damage to the optic nerve fibers that undergo an apoptotic process. The first approach to glaucoma therapy is the use of eyedrops that reduce the intraocular pressure. If the intraocular pressure cannot be maintained at low levels, surgery is the only option. Manual trabeculectomy is the gold standard in glaucoma filtration surgery. The goal is to surgically remove a small part of the trabecular meshwork and let the aqueous humor flow outside the eye under the conjunctiva. This technique, however, is quite unpredictable and depends on the surgeon experience and technique. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 115 A safer approach is to implant new filtration devices, among which the most reliable seems to be the Ex-press Glaucoma Filtration Device. The Ex-Press device is a small steel unit - similar in size to a grain of rice, around 2.64 mm- that is implanted between the inner region and the outer region of the eye. The EX-PRESS™ Glaucoma Filtration Device enables the drainage system of the eye, which has been damaged by glaucoma, to be bypassed. Recent clinical studies do confirm good results in terms of reduced intraocular pressure and less postoperative complications. Most of the drainage systems in the past did not offer satisfactory surgical outcomes. The ideal device should be made out of a inert material, that does not allow (or reduces) the postoperative inflammatory response. The aim of the research is to chemically and physically characterize the glaucoma filtration devices, study their hydrodynamics, the superficial nano characteristics, and implement their design and nanostructure. It would be of interest to test the flow of the devices via experimental modeling, the superficial roughness and the possible correlation to cellular on-growth. New construction materials or design may increase the outflow and the biocompatibility of the devices. Objectives for the three years The research steps will be State of the art data collection Study of the hydrodynamics with computer assisted simulations Study of the superficial nano-characteristics Study of inflammatory and fibroblastic adhesiveness on the surface Implementation of design and/or materials, eventually leading to a new coating of the devices or new construction materials Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 116 Objectives for the first year State of the art data collection and analysis Study of the hydrodynamics Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 117 GIOVANNA COCEANO Title of the thesis: Characterization of the mechanical properties of cancer cells Supervisor: Dan Cojoc Tutor (if any): Serena Bonin Laboratory: Optical Manipulation Laboratory @ IOM-CNR, Trieste Research Activity foreseen State of the art and motivations The research project is dedicated to the characterization of the mechanical properties of cancer cells. Among these we mention: cell stiffness, local viscoelasticity, cell-matrix and cell-cell adhesion. Cancer cells characterized by high aggressiveness specific to metastasis will make the object of the study since metastasis represents one of the most common causes of death in cancer patient. Metastasis means the spread of malignant cells from primary tumour to a distant organ requiring significant modifications of the cell biomechanics. It is accepted in general that tumour cells are softer than the corresponding non neoplastic cells and hence are more deformable under the same mechanical stress. Metastatic cells are even softer than primary tumour cells. In addition, they lose almost completely their cell-cell adhesion properties. These changes are consistent with the fact that malignant cells, characterized by increased replication and motility, have to penetrate the cellular matrix, go into the blood and lymphatic stream, and finally leave the stream to fix on new sites. Metastatic cells are tumour cells characterized by the ability to leave the primary tumour site and to reach a distant organ. The conversion of malignant cells in metastatic cells is accompanied by several biological processes that cause alterations leading to changes in cell structure and cytoskeleton. The membrane acquires new mechanical properties that contribute to cell deformability and to the ability of the cell to attach, move and spread. The cellular structure alteration reflects on the mechanical properties of the cell such as stiffness, local viscoelasticity, adhesion. The goal of the project is to characterize the mechanical properties of cancer cell with different level of aggressiveness and different metastatic potential and to correlate this with the plasma membrane structure and cytoskeleton organization. The study of the alterations of the membrane mechanical properties is very important for understanding better the migration mechanisms and to find new markers for cancer diagnosis and therapeutics. To reach this goal a novel method based on the use of Optical Tweezers (OT) has been developed at IOM-CNR. OT is an instrument that uses a highly focused laser beam to capture and manipulate microscopic objects by small forces (on the order of pN). OT has been used to locally measure the viscoelastic properties of the cell membrane for two breast cancer cell lines and a non-neoplastic one. References •Ashkin A. (2006). "Optical Trapping and Manipulation of Neutral Particles Using Lasers." Ed. World Scientific Publishing Company. Physics - Optics & Light. •Ashkin A., Dziedzic J.M., et al. (1986). "Observation of a single-beam gradient force optical trap for dielectric particles." Opt. Lett. •Ferrari E. PhD Thesis (2007).“ Optical manipulation and force spectroscopy at the cellular and molecular level by means of lazer tweezers” Università degli Studi di Trieste, CNR-INFM. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 118 •Federica Tavano , Serena Bonin , Giulietta Pinato , Giorgio Stanta & Dan Cojoc (2011). “Custom-Built Optical Tweezers for Locally Probing the Viscoelastic Properties of Cancer Cells”. International Journal of Optomechatronics. •Alia Al-Kilani, Olivier de Freitas, Sylvie Dufour, and Francois Gallet (2011). “Negative Feedback from Integrins to Cadherins: A Micromechanical Study”. Biophysical Journal. •Benoit Ladoux, Ester Anon, Mireille Lambert, Aleksandr Rabodzey, Pascal Hersen, Axel Buguink Pascal Silberzan, and Rene´-Marc Mege (2010).“Strength Dependence of Cadherin-Mediated Adhesions” Biophysical Journal. Objectives for the three years We plan to improve and extend the OT measurements also to other types of cancer cells, on one hand. On the other hand we will investigate also cell-cell and cell-matrix adhesion mechanisms by using properly functionalized beads. This project aims also to develop new optical methods for the investigation of the mechanical properties of cancer cells. Speckle sensing microscopy, recently applied at IOM-CNR to analyze malaria allows to investigate the stiffness of tens of cells in one second, recording and analyzing the dynamics of the speckle pattern produced by the cells under illumination by a tilted laser beam. Finally we will try to find a correlation between the mechanical properties of the cell with the presence of biomarkers as genes and proteins by molecular analysis, in an unified effort to characterize the beginning of the metastatic progression. Objectives for the first year •Learn and apply the OT measurements previously developed in the lab to increase the statistics for characterization of membrane viscosity and elasticity of two different kind of cancer cells: MDA-MB-231, MCF-7. •Elaboration of a new construct with two beads linked by a DNA or polymer tether to increase the sensitivity of the local measurements of the viscoelasticity. •Identification of the most suited cell-matrix and cell-cell adhesion proteins that can be attached to the probe in order to measure the viscoelastic properties of cancer cells membranes and to have local level measures •Learn and apply the speckle sensing microscopy technique to cancer cells. Research project This project has been initiated several years ago, and has been developed mainly during the doctorate of Federica Tavano, when the Optical Tweezers technique has been setup to analyze the viscoelastic properties (force, viscosity, tether membrane) of cell membranes belonging to three different types of breast cell lines. My job will be to continue this research project and to apply the method prepared by Federica to other cell lines (colon and pancreas). During these three months of work, I got familiar with microscope techniques, I did a training on the Optical Tweezers and I did a bibliographic research on tumour cells and their role in Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 119 metastasis, regarded to the mechanic properties. The work will continue through the following steps: •Bibliographic research on membrane proteins, in particular cadherins and integrins, in order to understand the biological mechanism of cell-cell adhesion and the role/deregulation of cellcell adhesion proteins during tumourigenesis and metastasis. •Functionalization of probes (micro beads, or AFM tips) with cell-cell adhesion proteins and measurements of the binding forces of their interaction with membrane proteins. •Improve the analysis of the viscoelastic properties by means of more specific probes, which allow us to have local measure •Analysis of gene regulation and protein expression by molecular biology approaches at the Cattinara Hospital in Trieste / University of Trieste •Development of a new technique in our lab, called speckle sensing microscopy, to measure the viscoelastic properties by monitoring the fluctuations of the cell membrane. Educational activity foreseen •Attend the School “Single Cell Physiology” at the “Ecole Normale Superieure”, Paris. •Study books and reviews cell mechanics, optical methods and lithographic processes. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 120 ANDREA COVA Email: [email protected] Laboratory: R.A.M.S.E.S. Istituti Ortopedici Rizzoli, Bologna Title of the thesis: “Role of collagen cross-linkers on the stability of the bonded interface” Supervisor: Prof. Breschi Lorenzo Research Activity foreseen State of the art and motivations The prevention and treatment of tooth decay are major challenges in dentistry. It’s estimated that 90% of adults in Western countries in the USA suffer from this dental disease (1). The primary objective of restorative dentistry is to repair and replace damage tooth structures by the application of synthetic materials aiming at the re-establishment of tooth aesthetics and function. Current restorative procedures generally depend on the formation of an adhesive bond between polymeric dental materials and the tooth substrate, enamel and dentin in particularly (2). Dentin is the tissue underlying the dental enamel that constitutes the bulk of the tooth. I has a specifically oriented micro-morphology composed of tubules (~1-2μm diameter) (3) surrounded by a hypermineralized layer (~1μm), called peritubular dentin and a softer intertubular matrix, where the organic material is concentrated (4). The intertubular matrix is mainly composed of type I collagen fibrils with associated non-collagenous proteins and proteoglycans, forming a three-dimensional organic network reinforced by apatite mineral crystallines (3). The repair of tooth structures with polymeric adhesive materials generally involves three distinct processes, namely acid etching, priming and bonding, although several self-adhesive resin also exist (2). In dentin, infiltration of the adhesive resin in to the collagen network is a process termed hybridization. The result of this diffusion process has been called the “hybrid layer”(5,6). It’s generally accepted that the final goal of these adhesive procedure is the complete infiltration of the demineralized collagen fibrils by the monomeric resin (2,5,6,7). The complexity by collagen-monomeric resin induced at the degradation mechanism of tooth-biomaterial interface, called nanoleakage phenomenon (8). It has been shown that nanoleakage can occur in the absence of the marginal gaps in biomaterials-dentin interface, which led to the conclusion that host-derived proteinases make an important contribution to the degradation of incompletely infiltrated collagen in bonded dentin (9). Breschi et al. (7) described the presence of MMPs, a class of zinc and calcium dependent endopeptidases, trapped within the mineralized dentin matrix during tooth development (2). The release and the activation of these proteinases during dentin bonding (9) are thought to be responsible for the degradation of collagen fibrils in incompletely infiltrated hybrid layers in aged bonded dentin (10). Recent studies demonstrating the efficacy of cross-linking agents in increasing the longevity of resin-dentin bond support the hypothesis that the collagen structure plays a critical role in regulating MMP degradation (11,12). The project topic of my research is to investigate the innovative nano-molecules which would induce collagen cross-linking and if possible develop a new adhesive system to be applied to the dentin surface to stabilize the adhesive bond in the long term. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 121 References: 1. Beltran-Aguilar ED, Barker LK, Canto MT, Dye BA, et al. (2005) Surveillance Summaries 54: MMWR Atlanta, GA: Centers for Disease Control and Prevention; p. 1-13. 2. Pashley DH, Tay FR, Breschi L, Tjaderhane L, Carvalho RM, Carillo M et al. (2011). State of the art etch-and-rinse adhesives. Dent Mater 27:1-16. 3. Marshall GW, Marshall SJ, Kinney JH, Balooch M (1997). The dentin substrate: structure and properties related to bonding. J Dent 25:441-58. 4. Bertassoni LE, Stankoska K, Swain MV (2012). Insights into the structure and composition of the peritubular dentin organic matrix and lamina limitans. Micron 43:229-36. 5. Nakabayashi N, Kojima K, Masuhara E (1982). The promotion of adhesion by the infiltration of monomers into tooth substrates. J Biomed Mater Res 16:265-73. 6. Sano H, Shono T, Takatsu T, Hosoda H (1994). Microporous dentin zone beneath resinimpregnated layer. Oper Dent 19:59-64. 7. Breschi L, Mazzoni A, Ruggeri A, Cadenaro M, Di Lenarda R, De Stefano Dorigo (2008). Dental adhesion review: aging and stability of the bonded interface. Dent Mater 24:90-101. 8. Sano H (2006). Microtensile testing, nanoleakage and biodegradation of resin-dentin bonds. J Dent Res 85:11-14. 9. Pashley DH, Tay FR, Yiu C, Hashimoto M, Breschi L, Carvalho RM et al (2004). Collagen degradation by host-derived enzymes during aging. J Dent Res 83:216-21. 10. De Munch J, Van Meerbek B, Yoshida Y, Inoue S, Vargas M, Suzuki K et al (2003). Four year water degradation of total-etch adhesive bonded to dentin. J Dent Res 82:136-40. 11. Al-Ammar A, Drummond JL, Bedran-Russo AK. The use of collagen cross-linking agents to enhance dentin bond strength (2009). J Biomed Mater 91:506-11. 12. Cova A, Breschi L, Nato F, Ruggeri Jr A, Carrilho M, Tjaderhane L et al (2011). Effect of UVA-activated riboflavin on dentin bonding. J Dent Res 90:1439-45. Objectives for the three years Objective of the research project is to investigate the role of collagen cross-linkers applied to the dentin substrate, with particular reference to the role of endogenous MMPs involved in the degradation collagen fibrils. Moreover, investigate with the light, transmission and scanning electron microscopy the nanostructure of the dentin collagen with and without the application of cross-linkers agents. Objectives for first following year Riboflavin (Vitamin B2) cross-linkers will be applied on the dentinal surface at different time storage and will be evaluated the response of dentinal tissue in order to stabilize the bond adhesive interface. Proteins of dentin will be extracted for zymographic assays in order to highlight the activities of MMPs. Research project Testing materials: - Microtensile bond strength test; - Zimographic analysis; - Light microscopy (LM); - Transmission electron microscopy (TEM); - Scanning electron microscopy (SEM). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 122 Educational activity foreseen - Participation to national and international meetings on dental materials; - Frequency of research laboratories at the Istituti Ortopedici Rizzoli in Bologna and at the University of Trieste; - Study of published papers on collagen cross-linkers agents. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 123 MARINA DIOLOSÀ Email: marina.diolosà@phd.units.it Laboratory: Department of Medical Sciences Title of the thesis: Development of a new nano-engineered biopolymer-based dental adhesive system Supervisor: Prof. Cadenaro Milena Tutors (if any): Prof. Breschi Lorenzo Research Activity foreseen State of the art and motivations Dental caries (tooth decay) has historically been considered the most important component of the global oral disease burden. Dental caries is still a major public health problem in most high-income countries as the disease affects 60-90% of school-aged children and the vast majority of adults. Worldwide, dental caries prevalence is high among adults as the disease affects nearly 100% of the population in the majority of countries (World Health Organization (WHO). Future use of materials for dental restoration. Report of the meeting convened at WHO HQ, Geneva, Switzerland. 2011). The principal reasons for the placement the restorations are: primary caries, secondary caries, margin fracture/degradation and tooth fracture, other reasons comprised principally lost restorations and endodontic access. The placement of effective long-lasting restorations is important because this reduces the long-term cost of dental treatment. Longevity of dental restoration is dependent upon many different factors, including material, patient and dentist- related factors (Manhart J, Chen H, Hamm G, Hickel R. Buonocore Memorial Lecture. Review of the clinical survival of direct and indirect restorations in posterior teeth of the permanent dentition. Oper Dent. 2004 Sep-Oct;29(5):481-508) The materials used for direct and indirect restorations are the adhesive systems and resin-based composite. The project is focused on responding to the widespread clinical need of stable dental restoration. The objective of this project is the development of an innovative nano-engineered biocompatible dental adhesive system capable to form covalent chemical bonds with both the dentin collagen and the restorative resin and with antibacterial activity. The project is based on a new concept of adhesive system based on a biopolymer (chitosan) capable of double covalent reticulation. The polymeric backbone will be modified in order to bear both methacrylate groups and glutamine residues. This formulation should be able to be covalently bonded to both the exposed dentin collagen by exploiting crosslinking reactions catalyzed by transglutaminase enzymes and to the restorative material by means of a photopolymerization process. The adhesive will be then enriched with nanosilver particles to improve its antibacterial properties. If successful, this project would lead to the realization of a natural-derived adhesive specifically designed to promote long-term stable restoration of teeth. Objectives for the three years Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 124 The objective of this project is the development of an innovative nano-engineered biopolymerbased dental adhesive system capable to form covalent chemical bonds with both the dentin collagen and the restorative resin and with antibacterial properties. Objectives for first following year (if applicable) Chitosan will be used both as a primer or added to adhesive resins. In the first case the chitosan diluted with ethanol will be applied on the tooth surface, followed by the application of an experimental adhesive resin and bond strength will be measured. In the second case, low pm chitosan will be added in increasing concentrations to an experimental adhesive resin. Properties of the mixture such as degree of conversion, elastic modulus and microhardness will be measured in order to find out if they are compatible with the use on dental tissues. When the optimal concentration will be found, the chitosan-based experimental adhesive will be applied on the tooth surface and bond strength will be measured. Research project Testing materials: Degree of conversion Elastic modulus Micro-hardness Microtensile bond strength test Educational activity foreseen Participation to National and International meetings on dental materials (Congresso Nazionale del Collegio dei Docenti di Odontoiatria, Torino April 12-14, 2012; Annual Meeting of the Academy of Dental Materials, Orlando (USA) September 19-22, 2012) Study of published works on dental adhesive formulation and use of chitosan for biomedical puroposes; Acquisition of skills in using FTIR for the calculation of degree of conversion, in elastic modulus and microhardness measurement and in bond strength testing. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 125 ELENA ELISEI Email: [email protected] Laboratory: Life Sciences Department – Laboratory of Physical and Macromolecular Chemistry Title of the thesis: Nanostructured biomolecular glasses Supervisor: Prof. Attilio Cesàro Tutor: Fabio Tedoldi (Bracco Imaging, Colleretto Giacosa) Research Activity foreseen State of the art and motivations The aim of this research project is to investigate the perturbation and influence the glassy state has on the magnetic properties of embedded materials. The glassy state[1] is very common in nature, is characterized by a structural irregularity and other physical properties highly dependent on temperature and time and on the amorphization conditions. These features give to the glassy systems particular moldability and versatility, and as a consequence, they are used in many technological fields[2]. The simplest procedure for glass production is the istantaneous freezing of a liquid (said supercooled liquid), which prevents the material to crystallize. Although this technique has been known and used for thousands of years, many questions about the way the supercooled liquid acquires an amorphous rigidity still remains open[3]. For instance, the quantitative study of the extraordinary viscosity increase accompanying the supercooling process and the formation of the glass(es) (and then the glass transition) is certainly one open problem in this field[4]. Particular cases are the biomolecular glasses, which have wide applications for example in biosciences (for the production and the processing of foods with special characteristics of consistency, shelf life and stability)[5] or in the preservation of microorganisms life under extreme conditions of temperature or dehydration. Another emerging field of application, which is closely linked to this research project, is the medical physics, because biomolecular glasses, with and without nanostructured elements, can be used for the production of specific contrast agents for Nuclear Magnetic Resonance. More in detail, the glassy materials are suitably doped with radical species, in order to maximize the NMR signal with a specific procedure called DNP (Dynamic Nuclear Polarization) in order to get MRI images with highest resolution[6-8]. The DNP principle is the following: a diamagnetic insulator contains a small concentration of paramagnetic impurities, whose electron spins are oriented easily in an external magnetic field, and precede around with the Larmor frequency ωe. The application of a microwave field to the sample and the ESR resonance (Electron Spin Resonance) with frequency ω = ωe ± δ dove |δ| << |ωe| allow the transmission of a high degree of orientation from electron spins to the nuclear spins, obtaining a polarization ±P where P >> |Pneq| Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 126 and Pneq is the nuclear polarization at equilibrium. In the latest years of the past century, the production of intense magnetic fields using superconducting coils and very low temperatures using dilution refrigerators (B ≈ 80 kOe, T ≈ 10 mK) has achieved a polarization of 70% for protons. The magnetic properties of the contrast agents obtained with this technique are very sensitive to the nanostructures and to the voids heterogeneity present within the glassy matrix. The issue of voids and nanostructures formed during the process of amorphization because of the chemical heterogeneity of the samples (embedding matrix, radical and other biological species) will be the main subject of investigation. [1] F.H. Stillinger, P.G. Debenedetti “Supercooled liquids and the glass transition” Nature 410 (2001). [2] C.A. Angell “Formation of glasses from liquids and biopolymers” Science 267 (1995), 1924–1935. [3] T.M. Truskett, P.G. Debenedetti, F.H.Stillinger et al “Theory of supercooled liquids and glasses: energy landscape and statistical geometry perspectives” Adv. Chem. Eng. 28 (2001) pp. 21–79. [4] P.W. Anderson “Through a glass lightly” Science 267 (1995), p. 1615. [5] P. Lillford, J.M.V. Blanshard “The Glassy State in Food” Nottingham Easter School in Agricultural and Food Sciences 1993. [6] M. Goldman, A. Abragam “Principles of dynamic nuclear polarisation” Rep. Prog. Phys. 41(3) (1978), pp. 395–467. [7] F. Bloch “Nuclear Induction” Phys. Rev. 70(7-8) (1946), p. 460. [8] W. de Boer “Dynamic Orientation of Nuclei at Low Temperatures” Journal of Low Temperature Physics 22 (1976). Objectives for the three years The research activities of the main part of the project are designed to study some chemical and physical aspects underlying the DNP process: - to study the role of the glassy state in obtaining an acceptable polarization and correlation between the physical state (crystalline, semicrystalline or amorphous) of the sample and its hyperpolarizability; - to identify the molecular parameters and the processes that may amplify the dynamic nuclear polarization and its life time; - to identify the conditions necessary to achieve a biomolecular system with characteristics of efficiency as regards the amplification of hyperpolarization and its life time. The research activities of a second line of the project have the purpose of investigating possibile innovative experimental procedures (in terms of process and/or molecule) to transform a biomolecular material (from crystalline or solution state) into a glass: - to study, from the viewpoint of characterization and stability of the vitreous phase, both the liquid samples at room temperature (Tm < Troom, Tg << Troom) and solid samples, the latter characterized by greater stability and perhaps more suitable for applications in the field of DNP. Objectives for the first year In the first year of PhD we plan to investigate the theoretical basis of the DNP phenomenon, to identify some model molecules and to characterize them in terms of chemical and physical Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 127 properties. This study may provide important informations on fundamental parameters that come into play in the hyperpolarization process, and that will be studied in the following years of PhD. Research project he research project will focus on the investigation of the influence of the glassy state and its nanostructures and voids heterogeneity on the hyperpolarization efficiency (DNP) of the biomolecular glasses used as molecular contrast agents. Furthermore, possible innovative experimental procedures will be investigated to obtain nanostructured glasses from biomolecular materials; the samples obtained by various procedures will be studied especially from the point of view of structural stability. The detailed work program is shown in the following table. Activities 2012 1 2 3 2013 4 1 2 3 2014 4 1 2 3 4 Preparation of samples (e.g. Quenching, Evaporation, Spry drying) Characterization and investigation on the efficiency of magnetic transfer (e.g. Calorimetry, PALS, NMR, EPR, Cristallography) Data analysis and experiments correlations Literature search Educational activities Paper writing and conferences Educational activity foreseen During the first year of PhD, it will be necessary to examine some wide themes connected with the research project: - Magnetism and Dynamic Nuclear Polarization, - Crystallography and X-ray Diffraction, Calorimetry and biomolecules, including biomacromolecules For this reason it is planned to attend (I’ve already attended) schools, conferences and courses related to these issues:: - Seminar: “Computational approaches to modeling of ESR and NMR observables”, prof. Antonino Polimeno - School: “Italian school on magnetism”, University of Pavia - Course: “Spring corse of powder diffraction method”, University of Trieste - Seminar: “Introduction to molecular magnetism and spin crossover complexes”, prof. Sylvestre Bonnet - Conference: “XXXIV Italian Congress on Calorimetry, Thermal Analysis and Applied Thermodynamics”, University of Rome - School: “IISS school on crystallography for health and biosciences”, University of Como - Course: “Macromolecole 1”, prof. Attilio Cesàro Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 128 STEFANO FORNASARO Email: [email protected] (temporary) Laboratory: Department of Life Sciences of Trieste University, via L. Giorgieri, 1 34127 Trieste Italia Title of the thesis: Targeting natural antioxidant compounds to the brain: a metabolomic assessment Supervisor: Sabina Passamonti Tutors: Fulvio Mattivi, Lovro Žiberna Research Activity foreseen State of the art and motivations Population ageing has been a policy priority at both Member State and European Union (EU) levels for more than two decades and, in recent years it has been promoted to the level of a “grand challenge”: the number of Europeans aged 65 and over is expected to increase by 45% between 2008 and 2030, and will be over 30% of the population by 2060 [1]. Ageing is associated with many common chronic neurodegenerative diseases and the precise cause of the neuronal degeneration underlying these diseases and, indeed, normal brain ageing remains unclear [2]. Nevertheless it is thought that several cellular and molecular events are also involved, including impaired mitochondria function, activation of neuronal apoptosis, the deposition of aggregated proteins and excitotoxicity. Representing one of the most important lifestyle factors, the diet can strongly influence the incidence and onset of neurodegenerative disorders. Epidemiological studies have demonstrated the positive effect of fruit and vegetable rich-diet on pathologies strictly linked with an unbalance of the redox status, as ageing, cancer, diseases of cardiovascular system and some degenerative disease [3, 4]. Detailed investigations into the specific dietary components of these foods have consistently suggested that a group of phytochemicals, known as flavonoids, is highly effective in reversing agerelated declines in neuro-cognitive performance. In particular, evidence suggests that foods rich in three specific flavonoid sub-groups, the flavanols, anthocyanins and/or flavanones, possess the greatest potential to act on cognitive processes [5]. In addition, a growing number of flavonoids have been shown to inhibit the development of Alzheimer disease-like pathology and to reverse deficits in cognition, suggestive of potential therapeutic utility in dementia [6-10]. Flavonoids may mediate these positive effects via a number of routes [11,12], including a potential to protect neurons against injury induced by neurotoxins [13], an ability to suppress neuroinflammation [14] and a potential to promote memory, learning and cognitive function [7, 8, 15]. As anti-cellular oxidative stress agents flavonoids can act either as direct chemical antioxidants, the classic view of flavonoids as antioxidants [16, 17], or as modulators of enzymes and metabolic and signaling pathways leading to an overshot of reactive oxygen species (ROS) formation, a more recently emerging concept [18-28]. Despite these effects, there is a lack of information regarding the interaction between flavonoids and the blood-brain barrier (BBB) [29]. Altogether, these data are adding more and more confusion on how to explain epidemiological data and prevent rather than promote mechanistic explanations of flavonoid bioactivity. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 129 Some works have succeeded in filling gaps of knowledge concerning the fast absorption of grape anthocyanins (wine pigments) from the stomach [30] and their fast distribution in tissues, such as the brain [31], the liver [32], the kidney [33]. In all tissues, anthocyanins were found unmodified with respect to their original chemical structure. The amounts recovered and measured in these tissues were however very low, i.e. at concentrations too low to scavenge reactive oxygen species, leaving open the possibility that their biological activities might be due to the modulation of cellular enzymes. Undoubtely, ”omic” approaches are the most suitable to obtain a global view on the impact of anthocyanins on enzyme function [34-36]. However, the time window in which anthocyanins have their peak impact on the cell is very short (less than a few min). Thus, it is unlikely that anthocyanin effects be detected at the level of the transcriptome or of the proteome. Only changes at the level of the metabolome might be expected. Preliminary data in support of this contention are available [37, 38]. Moreover, the same approach will also enable to better understand a crucial step of anthocyanin bioactivity in the brain, i.e. their membrane transport, mediated by the plasma membrane transporter bilitranslocase. In facts, specific monoclonal antibodies are available to target the native protein and induce its functional loss in intact cells [39]. By this approach, complex phenomena will be understood in the light of the specific nano-scale molecular recognitions taking place at the level of this transporter. Objectives for the three years The aim of this project is to directly assess uptake and metabolism of the dietary anthocyanin cyanidin 3-glucoside (C3G) into the brain, and to verify the hypothesis that the specific uptake of flavonoids across the blood-brain barrier requires the activity of membrane transporters, among which bilitranslocase. It may be mentioned that bilitranslocase is so far the only membrane transporter whose role in the bioavalilability of dietary flavonoids has been established. Obbiettivi da raggiungere per il primo anno In the first year this project will aim at investigating the metabolic changes occurring in the brain as a result of the intake of anthocyanins. These changes will be examined by a metabolomic analysis. Research project RO1. Metabolomic analysis of rat brains after C3G administration (C3G, 5’ IV) oAim. To identify and quantify all metabolites in a specific tissue (rat brains) in order to obtain insights in the metabolic changes following an intravenous administration of a pure anthocyanin (C3G). oApproach. Rats will be treated with an i.v. dose (330 μg) of C3G. They will be euthanized after 5'. Their blood and brains will be collected and analysed by UPLC/QTOF-MS. oExpected results. Previous data have shown that anthocyanins are transported into the brain. It is expected that these compounds will undergo metabolism, consisting in methylation of the catechol moiety, similarly to what seen in other organs. The metabolic changes might involve multiple metabolic pathways, since no one pathway operates in isolation. It is expected that these data will provide cues about the molecular mechanisms whereby food rich in anthocyanins improves the mental performance both in experimental animals and in humans. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 130 oCollaboration: Fondazione Edmund Mach-Istituto Agrario di San Michele all’Adige (FEM-IASMA), Dr Fulvio Mattivi. RO2. Immunochemical localisation of bilitranslocase in the rat brain. oAim. To investigate the expression and function of bilitranslocase in the whole brain, as well as isolated neurons, and glial cells grown in culture. oApproach. Both immunohistochemical and immunocytochemical (IHC and ICC) analysis are planned to assess the presence of bilitranslocase in specific brain areas. Preliminary evidence is available. Particularly interesting is its detection at the level of the blood-brain barrier. The antibody used will be an anti-sequence antibilitranslocase, prepared as described previously [40]. oExpected results. Bilitranslocase will be identified in specific areas of the brain, which will therefore be regarded as potential targets of dietary anthocyanins. oCollaborations. Laboratory of Neuronatomy, Dept of Life Sciences, Prof. Enrico Tongiorgi; Blood Transfusion Centre of Slovenia (BTCS), Dr Vladka Curin Šerbec. RO3. Role of bilitranslocase in anthocyanin uptake in neurons. oAim. To investigate the mechanism of 3CG uptake into neurons and glial cells. oApproach. Human neuroblastoma and neuroglioma cell lines will be used to asses C3G transport into cells. C3G and its metabolites (putatively its methylation product, i.e. peonidin 3-glucoside) will be assayed by HPLC coupled with thermal lens spectroscopy detection. When the method will be set up and shown to be amenable to more subtle investigations, primary hippocampus neurons explanted from murine brains will be tested. oExpected results. These studies will point to the occurrence of specific molecular interactions involving dietary anthocyanins and the membrane transporter bilitranslocase, expressed in neuronal cells. oCollaborations. Laboratory of Neuronatomy, Dept of Life Sciences, Prof. Enrico Tongiorgi, Blood Transfusion Centre of Slovenia (BTCS), Dr Vladka Curin Šerbec. Analyses will be carried out at the University of Nova Gorica - Laboratory of Environmental Research, Prof. Mladen Franko,within the scope of a research agreement (Trans2care project). RO4. Role of bilitranslocase in anthocyanin uptake in the brain. oAim. To assess the functional role of BTL in targeting natural antioxidant compounds to the brain. oApproach. Anaesthetized rats will receive an i.v. dose of C3G. After 1.5 min, rats will be euthanized, and blood, liver, kidneys and brain will be collected and further analysed by HPLC-MS/MS and UPLC/QTOF-MS. By the first approach (target analysis), C3G and its metabolites will be assessed; by the second one (untargeted analysis), the changes in the metabolome will be mapped. Rats will be divided in 2 groups, one serving as control, the other will be pre-treated by the i.v. injection of a specific, monoclonal anti-bilitranslocase antibody, cleaved to yield the so-called Fab fragment. Fab antibodies have intact hypervariable regions interacting with the antigen, but are devoid of the Fc shaft, thus of the capacity to activate the complement and trigger membrane permeabilisation and injury. oExpected results. Transport of C3G into the tissues expressing bilitranslocase should be decreased. The influence of specific membrane transporters, e.g. bilitranslocase, in the pharmacokinetics and pharmacodynamics of drugs (e.g. anthocyanins) will be documented in the whole organism for the first time. oCollaborations. Fondazione Edmund Mach-Istituto Agrario di San Michele all’Adige (FEM-IASMA), Dr Fulvio Mattivi, Central Laboratory, Agricultural Institute of Slovenia, Dr Andreja Vanzo, Blood Transfusion Centre of Slovenia (BTCS), Dr Vladka Curin Šerbec. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 131 The Gantt diagram is appended. Bibliographic references [1] Team, F. C., and Aline Marcowycz, T. M., Carlos Chiatti , Hans-Werner Wahl, Torbjörn Svensson, James Goodwin, Carol Jagger, Giovanni Lamura, Susanne Iwarsson, Alice Sinigaglia, Juliet Craig, Alan Walker, Stuart Parker. (2011) FUTURAGE. A Road Map for European Ageing Research, In Meeting the Grand Challenge of Ageing: The European Research Agenda (Studies, T. U. o. S. S., Ed.), Paul-Henri Spaak P1A002, European Parliament, Brussels. [2] Desai, A. K., Grossberg, G. T., and Chibnall, J. T. (2010) Healthy brain aging: a road map, Clin Geriatr Med 26, 116. [3] Campbell, T. C., Parpia, B., and Chen, J. (1998) Diet, lifestyle, and the etiology of coronary artery disease: the Cornell China study, Am J Cardiol 82, 18T-21T. [4] Jin, Y., Alimbetov, D., George, T., Gordon, M. H., and Lovegrove, J. A. (2011) A randomised trial to investigate the effects of acute consumption of a blackcurrant juice drink on markers of vascular reactivity and bioavailability of anthocyanins in human subjects, Eur J Clin Nutr 65, 849-856. [5] Bohm, H., Boeing, H., Hempel, J., Raab, B., and Kroke, A. (1998) [Flavonols, flavone and anthocyanins as natural antioxidants of food and their possible role in the prevention of chronic diseases], Z Ernahrungswiss 37, 147-163. [6] Dragicevic, N., Smith, A., Lin, X., Yuan, F., Copes, N., Delic, V., Tan, J., Cao, C., Shytle, R. D., and Bradshaw, P. C. (2011) Green tea epigallocatechin-3-gallate (EGCG) and other flavonoids reduce Alzheimer's amyloid-induced mitochondrial dysfunction, J Alzheimers Dis 26, 507-521. [7] Spencer, J. P. (2008) Food for thought: the role of dietary flavonoids in enhancing human memory, learning and neuro-cognitive performance, Proc Nutr Soc 67, 238-252. [8] Spencer, J. P. (2010) The impact of fruit flavonoids on memory and cognition, Br J Nutr 104 Suppl 3, S40-47. [9] Harborne, J. B., and Baxter, H. (1999) Handbook of natural flavonoids, John Wiley & Sons, Chichester. [10] Steele, M., Stuchbury, G., and Munch, G. (2007) The molecular basis of the prevention of Alzheimer's disease through healthy nutrition, Exp Gerontol 42, 28-36. [11] Vauzour, D., Vafeiadou, K., Rodriguez-Mateos, A., Rendeiro, C., and Spencer, J. P. (2008) The neuroprotective potential of flavonoids: a multiplicity of effects, Genes Nutr 3, 115-126. [12] Spencer, J. P. (2009) Flavonoids and brain health: multiple effects underpinned by common mechanisms, Genes Nutr 4, 243-250. [13] Spencer, J. P. (2008) Flavonoids: modulators of brain function?, Br J Nutr 99 E Suppl 1, ES60-77. [14] Vafeiadou, K., Vauzour, D., and Spencer, J. P. (2007) Neuroinflammation and its modulation by flavonoids, Endocr Metab Immune Disord Drug Targets 7, 211-224. [15] Spencer, J. P. (2009) The impact of flavonoids on memory: physiological and molecular considerations, Chem Soc Rev 38, 1152-1161. [16] Rice-Evans, C. A., Miller, N. J., and Paganga, G. (1996) Structure-antioxidant activity relationships of flavonoids and phenolic acids, Free Radic Biol Med 20, 933-956. [17] Terao, J. (2009) Dietary flavonoids as antioxidants, Forum Nutr 61, 87-94. [18] Londono-Londono, J., Lima, V. R., Jaramillo, C., and Creczynski-Pasa, T. (2010) Hesperidin and hesperetin membrane interaction: understanding the role of 7-O-glycoside moiety in flavonoids, Arch Biochem Biophys 499, 6-16. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 132 [19] Androutsopoulos, V. P., Papakyriakou, A., Vourloumis, D., Tsatsakis, A. M., and Spandidos, D. A. (2010) Dietary flavonoids in cancer therapy and prevention: substrates and inhibitors of cytochrome P450 CYP1 enzymes, Pharmacol Ther 126, 9-20. [20] Gokara, M., Sudhamalla, B., Amooru, D. G., and Subramanyam, R. (2010) Molecular interaction studies of trimethoxy flavone with human serum albumin, PLoS One 5, e8834. [21] Rashidi, M. R., and Nazemiyeh, H. (2010) Inhibitory effects of flavonoids on molybdenum hydroxylases activity, Expert Opin Drug Metab Toxicol 6, 133-152. [22] Chalopin, M., Tesse, A., Martinez, M. C., Rognan, D., Arnal, J. F., and Andriantsitohaina, R. (2010) Estrogen receptor alpha as a key target of red wine polyphenols action on the endothelium, PLoS One 5, e8554. [23] Huang, Z., Fang, F., Wang, J., and Wong, C. W. (2010) Structural activity relationship of flavonoids with estrogenrelated receptor gamma, FEBS Lett 584, 22-26. [24] Alvarez, A. I., Real, R., Perez, M., Mendoza, G., Prieto, J. G., and Merino, G. (2010) Modulation of the activity of ABC transporters (P-glycoprotein, MRP2, BCRP) by flavonoids and drug response, J Pharm Sci 99, 598-617. [25] Sheng, R., Lin, X., Zhang, J., Chol, K. S., Huang, W., Yang, B., He, Q., and Hu, Y. (2009) Design, synthesis and evaluation of flavonoid derivatives as potent AChE inhibitors, Bioorg Med Chem 17, 6692-6698. [26] Sirk, T. W., Brown, E. F., Friedman, M., and Sum, A. K. (2009) Molecular binding of catechins to biomembranes: relationship to biological activity, J Agric Food Chem 57, 6720-6728. [27] Ochiai, H., Takeda, K., Soeda, S., Tahara, Y., Takenaka, H., Abe, K., Hayashi, Y., Noguchi, S., Inoue, M., Schwarz, S., Schwarz, W., and Kawamura, M. (2009) Epigallocatechin-3-gallate is an inhibitor of Na+, K(+)-ATPase by favoring the E1 conformation, Biochem Pharmacol 78, 1069-1074. [28] Ragazzon, P. A., Iley, J., and Missailidis, S. (2009) Structure-activity studies of the binding of the flavonoid scaffold to DNA, Anticancer Res 29, 2285-2293. [29] Faria, A., Pestana, D., Teixeira, D., Couraud, P. O., Romero, I., Weksler, B., de Freitas, V., Mateus, N., and Calhau, C. (2011) Insights into the putative catechin and epicatechin transport across blood-brain barrier, Food Funct 2, 39-44. [30] Passamonti, S., Vrhovsek, U., Vanzo, A., and Mattivi, F. (2003) The stomach as a site for anthocyanins absorption from food, FEBS Lett 544, 210-213. [31] Passamonti, S., Vrhovsek, U., Vanzo, A., and Mattivi, F. (2005) Fast Access of Some Grape Pigments to the Brain, J Agric Food Chem 53, 7029-7034. [32] Passamonti, S., Vrhovsek, U., Terdoslavich, M., Vanzo, A., Cocolo, A., Decorti, G., and Mattivi, F. (2003) Hepatic uptake of dietary anthocyanins and the role of bilitranslocase, In 1st International Conference on Polyphenols and Health (Scalbert, A., Ed.), p 278, Vichy - France. [33] Vanzo, A., Terdoslavich, M., Brandoni, A., Torres, A. M., Vrhovsek, U., and Passamonti, S. (2008) Uptake of grape anthocyanins into the rat kidney and the involvement of bilitranslocase, Mol Nutr Food Res 52, 1106-1116. [34] Fiehn, O. (2002) Metabolomics--the link between genotypes and phenotypes, Plant Mol Biol 48, 155-171. [35] Weckwerth, W., and Fiehn, O. (2002) Can we discover novel pathways using metabolomic analysis?, Curr Opin Biotechnol 13, 156-160. [36] Kell, D. B. (2006) Systems biology, metabolic modelling and metabolomics in drug discovery and development, Drug Discov Today 11, 1085-1092. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 133 [37] Mattivi, F., Guzzon, R., Vrhovsek, U., Stefanini, M., and Velasco, R. (2006) Metabolite profiling of grape: Flavonols and anthocyanins, J Agric Food Chem 54, 7692-7702. [38] Gika, H. G., Theodoridis, G. A., Vrhovsek, U., and Mattivi, F. (2012) Quantitative profiling of polar primary metabolites using hydrophilic interaction ultrahigh performance liquid chromatography-tandem mass spectrometry, J Chromatogr A. [39] Ziberna, L., Tramer, F., Moze, S., Vrhovsek, U., Mattivi, F., and Passamonti, S. (2012) Transport and bioactivity of cyanidin 3-glucoside into the vascular endothelium, Free Radic Biol Med. [40] Passamonti, S., Vanzo, A., Vrhovsek, U., Terdoslavich, M., Cocolo, A., Decorti, G., and Mattivi, F. (2005) Hepatic uptake of grape anthocyanins and the role of bilitranslocase, Food Res. Int. 38, 953-960. Educational activity foreseen My educational activities are ongoing since January 2012. I am preparing a review on membrane transporters a drug development targets. I have done an thorough literature review on the topic and deeply studied the following review papers: [1] Iqbal, M., Audette, M. C., Petropoulos, S., Gibb, W., and Matthews, S. G. (2012) Placental drug transporters and their role in fetal protection, Placenta 33, 137-142. [2] Lancaster, C. S., and Sparreboom, A. (2011) Pharmaceutical relevance of drug transporter malfunctions, Clin Pharmacol Ther 89, 471-474. [3] Degorter, M. K., Xia, C. Q., Yang, J. J., and Kim, R. B. (2011) Drug Transporters in Drug Efficacy and Toxicity, Annu Rev Pharmacol Toxicol. [4] Sissung, T. M., Baum, C. E., Kirkland, C. T., Gao, R., Gardner, E. R., and Figg, W. D. (2010) Pharmacogenetics of membrane transporters: an update on current approaches, Mol Biotechnol 44, 152-167. [5] Shugarts, S., and Benet, L. (2009) The role of transporters in the pharmacokinetics of orally administered drugs, Pharm Res 26, 2039-2054. [6] Grover, A., and Benet, L. (2009) Effects of drug transporters on volume of distribution, AAPS J 11, 250-261. [7] Benet, L. (2009) The drug transporter-metabolism alliance: uncovering and defining the interplay, Mol. Pharmaceutics 6, 1631-1643. [8] Zhang, L., Strong, J., Qiu, W., Lesko, L., and Huang, S. (2006) Scientific perspectives on drug transporters and their role in drug interactions, Mol. Pharmaceutics 3, 62-69. [9] Tsuji, A. (2006) Impact of transporter-mediated drug absorption, distribution, elimination and drug interactions in antimicrobial chemotherapy, J Infect Chemother 12, 241-250. [10] Petzinger, E., and Geyer, J. (2006) Drug transporters in pharmacokinetics, Naunyn Schmied Arch Pharmacol 372, 465-475. [11] Li, H., Benedito, V. A., Udvardi, M. K., and Zhao, P. X. (2009) TransportTP: a two-phase classification approach for membrane transporter prediction and characterization, BMC Bioinformatics 10, 418. [12] Saier, M. H., Jr., Yen, M. R., Noto, K., Tamang, D. G., and Elkan, C. (2009) The Transporter Classification Database: recent advances, Nucleic Acids Res 37, D274-278. [13] Tirona, R. G. (2011) Molecular mechanisms of drug transporter regulation, Handb Exp Pharmacol, 373-402. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 134 [14] Giacomini, K. M., and Sugiyama, Y. (2005) Membrane transporters and drug response, In Goodman & Gilman's The Pharmacological Basis of Therapeutics (Brunton, L. L., Lazo, J. S., and Parker, K. L., Eds.), pp 41-70, McGrawHill, New York. [15] de Vries, N. A., Buckle, T., Zhao, J., Beijnen, J. H., Schellens, J. H., and van Tellingen, O. (2012) Restricted brain penetration of the tyrosine kinase inhibitor erlotinib due to the drug transporters P-gp and BCRP, Invest New Drugs 30, 443-449. [16] Potschka, H. (2011) Role of CNS efflux drug transporters in antiepileptic drug delivery: Overcoming CNS efflux drug transport, Advanced drug delivery reviews. [17] Mruk, D. D., Su, L., and Cheng, C. Y. 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Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 139 Research visits in other Institutions A research training have been set in order to provide me with strong technical and scientific skills about new techniques and methodologies of interest for the project: during three months at the Fondazione Edmund Mach - Istituto Agrario di San Michele all’Adige (IASMA), I will get familiar with principles and methods of metabolomics, metabolic profiling, mass spectrometry (MS), advanced separation techniques, both in gas chromatography (GC) and in liquid chromatography (UPLC). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 140 TAMIRAA GANBOLD Email: [email protected] Laboratory: TASC-INFM National Laboratory CNR-IOM Title of the thesis: Development of quantum well structures for multi band photon detection. Supervisor: Dr. Giorgio Biasiol Tutors (if any): Dr. rer. nat. Ralf-Hendrik Menk Research Activity foreseen Preliminary experiments carried out on GaAs / InGaAs quantum well (QW) structures produced by CNR-IOM indicate that these devices are very valuable in multi band (from infrared to hard xrays) photon detection. The narrow and direct bandgap which can be adjusted as low as 0.8 eV allows designing very fast photon detectors with respond times in the pico second range. Moreover, internal charge amplification mechanism can be applied for very low signal levels. Within this thesis it is foreseen to develop segmented quantum well detectors (QWDs) that will allow to monitor simultaneously the intensity and the position of pulsed or continuous photon beams over an extended spectral range. These devices will be arranged off axis in a circle in the plane perpendicular to the incident radiation, and detect the scattered radiation stemming from the interaction of the primary beam with residual gas atoms. The backprojection of the measured signals will allow monitoring beam intensity and beam position simultaneously without altering the primary beam. The final product will be an extremely compact stand-alone device accommodating a multi channel QW sensor in an ultra high vacuum environment, the readout electronics, the data acquisition and a micro controller comprising standard interfaces. The acquisition can be synchronized with external events and will allow closing fast feedback loops. Due to its compactness the device can be placed close to the signal source thus minimizing electromagnetic pick-up. Although the primary application of the QWDs will be in the field of free electron lasers (FEL) thus of ultra bright light sources and synchrotron radiation (SR) experiments, the devices could be readily used in combination with table top lasers and exploit other fields of photonics. The thesis will follow three phases with a duration of one year each, comprising a preparatory phase, construction phase and an evaluation phase. Objectives for the first year. Preparatory phase. The preparatory phase includes literature research, simulation of the QWD and the design of small prototypes. The prototypes will be grown epitaxially at the high mobility molecular beam epitaxy system at CNR-IOM, and devices will be fabricated in the CNR-IOM clean room facility. They will be tested with existing low noise, multi channel readout electronics provided by Sincrotrone Trieste. A small system consisting of 4 sensors will be assembled and back projection algorithms will be tested. The objective of the first year is the proof of principle that such device can be operated under the experimental conditions of the FERMI free electron laser. Objectives for the second year. Construction phase. The construction phase includes optimization of the QWDs developed in the preparatory phase and the realization of the multi channel QWDs. Thorough tests of this multi channel sensor will be carried out at the FERMI FEL and at one of Elettra's bending magnet beamlines using the polychromatic SR. Using sufficient sensors (>16) the reconstruction of the beam cross section from the measured projection data should be feasible. Objectives for the third year. Evaluation phase. Thorough tests of the multi channel sensor developed in phase two will be continued. Different reconstruction approaches (filtered back projection, arithmetic reconstruction) will be tested and compared to real beam cross section measures by invasive beam viewers. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 141 ANDREI CRISTIAN IONESCU Email: [email protected] Laboratory: Department of Medical Sciences, University of Trieste, Italy Title of the thesis: The influence of resin-based dental materials upon oral biofilms development. Supervisor:Prof. Milena Cadenaro Tutor: Prof. Lorenzo Breschi Research Activity foreseen State of the art and motivations Restorative dentistry achieved a constant technological progress in the last years, reaching one of the highest levels of advancement in developing nanofilled composite restorative materials. These materials show advanced mechanical and optical properties, reaching structural and aesthetic performances comparable or very similar to those of dental tissues (1), yet a significant part of resin-based composite (RBC) restorations undergoes failure. The main reason for restorations failure overtime is secondary caries occurrence, that is a reappearance of the infectious process in the hard tissues close to the restoration (2). The process is generated by unfavorable interactions between the biofilm that colonize the surfaces of a restoration and the surrounding tissues. In vivo studies demonstrated that oral biofilm development on RBC restorations is higher than that occurring on natural teeth surfaces or on the surfaces of restorations made of other materials (3). A possible explanation for this behavior may be referred to the structure of the RBC surface. Surface finishing, indeed, significantly reduced adherent biomass on RBC surfaces by exposing a higher amount of inorganic filler to the surface and reducing the exposure of the resin matrix (4). The interactions between oral microflora and dental hard tissues may therefore be influenced by the biological behavior of the RBC restorations. The possibility of incorporating nanoparticles into RBC composition has been recently studied, with the final aim of obtaining restorations that are able to positively interact with the oral microflora, thus reducing the risk of secondary caries occurrence (5). Preliminary studies highlighted promising antibacterial properties for some of the considered nanoparticles, such as silver nanoparticles, amorphous calcium phosphate, chitosan and quaternary ammonium salts-containing nanoparticles (6-9). References: 1.Mitra SB, Wu D, Holmes BN. An application of nanotechnology in advanced dental materials. JADA 2003; 134: 1382-1390. 2.Deligeorgi V, Mjor IA, Wilson NH. An overview of reasons for the placement and replacement of restorations. Prim Dent Care 2001; 8: 5–11. 3.Hahn R, Weiger R, Netuschil L, Bruch M. Microbial accumulation and vitality on different restorative materials. Dent Mater 1993; 9: 312–316. 4.Ionescu A, Fadini L, Brambilla E, Burgers R, Rosentritt M, Handel G, Hahnel S. Surface properties and mutans streptococci biofilm formation on dental composites. 88th General Session IADR 2010; Oral poster presentation. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 142 5.Allaker RP. The Use of Nanoparticles to Control Oral Biofilm Formation. J Dent Res 2010; 89(11): 1175-1186. 6.Morones JR, Elechiguerra JL, Camacho A, Holt K, Kouri JB, Ramirez JT. The bactericidal effect of silver nanoparticles. Nanotechnology 2005; 16: 2346-2353. 7.Beyth N, Yudovin-Farber I, Perez-Davidi M, Domb AJ, Weiss EI. Polyethyleneimine nanoparticles incorporated into resin composite cause cell death and trigger biofilm stress in vivo. PNAS 2010; 107 (51): 22038–22043 8.Cheng L, Weir MD, Xu HHK,. Antonucci JM, Kraigsley AM, Lin NJ, Lin-Gibson S, Zhou X. Antibacterial amorphous calcium phosphate nanocomposites with a quaternary ammonium dimethacrylate and silver nanoparticles. Dent Mater 2012; 28: 561-572 9.Qi LF, Xu ZR, Jiang X, Hu CH, Zou XF. Preparation and antibacterial activity of chitosan nanoparticles. Carbohydrate Res 2004; 339: 2693-2700 Objectives for the first year Completing the first part of the research project, and in particular: - Surface characterization of experimental nanofilled RBCs with different filler content; - Evaluation of biofilm development on the surfaces of the experimental RBC and correlation of differences in bacterial colonization with surface characteristics; - Preliminary study on the effect of aqueous solution of chitosan nanoparticles on oral biofilms; Objectives for the three years -Following the first part of the research project, a series of studies will be made in order to find a successful antibacterial nanoparticles formulation to be blended into a RBC formulation: - study on the effect upon oral biofilms of chitosan nanoparticles incorporated into RBC or onto the surface of RBC by addition of acrylic functional groups; - study on the antibacterial effect of chitosan additioned with silver nanoparticles, and its possibility to be incorporated into the formulation of a RBC; - final part of the project: testing a novel nanoparticle-containing RBC with antibacterial properties. Tests will be made to assess the duration of the antibacterial capacity over time. . Research project To evaluate the in vitro development of oral biofilms on the surfaces of nanofilled RBC in controlled conditions using a continuous flow bioreactor (artificial mouth system, AMS), with the aim of discriminating the parameters influencing the biological behavior of these materials. Surface characterization will be performed considering the following parameters: surface roughness, surface free energy, superficial chemical composition. To this purpose tools such as surface profilometer, optical tensiometer, atomic force microscope (AFM), surface X-ray protoelectron spectroscopy (XPS) will be used. Biofilm development will be monitored using quantitative evaluation of bacterial metabolism (MTT assay) and morphological observations of the biomass by using scanning electron microscope (SEM) and confocal laser-scanning microscope Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 143 (CLSM). The latter tool will be able to provide a semi-quantitative analysis of the distribution of live and dead bacterial cells, their metabolism and the extra-cellular matrix synthesized by them, in particular at the interface between biofilm and RBC surface. Results of this first phase will provide a better comprehension of the parameters that influence microbiological interactions with RBC nanofillers, with the aim of reducing biofilm development on the surfaces of the studied materials. In the following phase, different antibacterial nanoparticles in varying concentrations will be blended into experimental RBC. These materials will be evaluated with the same procedure of surface analysis and biological behavior already described. In addition, mechanical characteristics (flexural strength and elastic modulus) will be determined for each tested material to verify that the addition of nanoparticles did not affect its load-bearing capability. Results ought to lead to the development of novel bioactive RBCs capable of reducing secondary caries occurrence. Educational activity foreseen Participation to international dental meetings in which microbiological performances of dental materials are discussed, such as the AIC meeting on May,4-5; participation to a closed meeting with professors David Pashley and Franklin Tay from the Medical College of Georgia, U.S.A. regarding the same topic and the development of novel adhesive systems. - Study of published works on antibacterial properties of nanoparticles in order to select the most appropriates to be included in the research project; - Acquisition of knowledge about physical behavior of antibacterial nanoparticles and the best means to synthesize each of them. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 144 GIACOMO LOVAT Email: [email protected] Laboratory: IOM-CNR Istituto Officina dei Materiali and ALOISA-HASPES beamline at Elettra synchrotron light source. Title of the thesis: Study of charge transfer at interfaces relevant for photovoltaic applications Supervisor: Prof. Alberto Morgante Tutor: Dr. Luca Floreano Research Activity foreseen State of the art and motivations Organic heterojunctions made up of small molecules donor-acceptor layers are one of the most promising systems for the development of new photoelectric devices, such as organic light-emitting diodes (OLED) and organic photovoltaic (OPV) cells. Small molecules OPV cells rely on electronhole pairs (excitons) generation by light absorption, their dissociation at the heterojunction and the subsequent charge carrier collection at the electrodes. The efficiency of such processes depends strongly on the chemistry and nanoscale morphology of the donor-acceptor interface and of the electrode-active layer interface. The former determines the exciton dissociation rate, while the latter is important for the effective charge collection. Good interface control is a major challenge towards boosting the overall efficiency of OPV devices, which still remains around 7-8%, thus opening the way to their large-scale commercialization. The stacking of small planar organic molecules on metal or dielectric surfaces can be viewed as an archetypal model of the interface between the active part and the electrodes in an OPV device. The active part can consists of a single organic film supported onto a dielectric (TiO 2, which can be suitably prepared to function as transparent conducting oxide for one electrode) or a heterojunction confined between two metallic layers. The PhD project aims at the morphological and spectroscopical characterization of organic thin films and donor-acceptor bilayers on metals and metal oxides (in particular on TiO2), so as to gain insight into the ordering, the molecule-substrate and intermolecular charge transfer and transport properties exhibited by such archetypal models. The ideal hybrid junction is obtained by molecules overlapping their π orbitals to the substrate charge density, which is the standard configuration for the first layer of poly- and hetero-aromatic molecules on metals. Unfortunately, in most cases a molecular reorientation takes place from the second layer on, where van der Waal's intermolecular forces drive the molecular self-organization, thus originating topological defects that increase the device inner resistance. On the other hand, optimal π coupling is also required in donor-acceptor pairs to enhance the charge transfer. The difficult task is to preserve this coupling geometry when the molecules are brought in contact with a substrate, either a metal electrode or a supporting dielectric. Preserving i) the optimal π coupling between the molecules, ii) its coherence with the contact layer, and iii) a good degree of orientational order (lateral coherence) does not simply allow the realization of an ideal device (which would be hardly engeneered into a production chain), rather it makes possible the study of fundamental properties for a thorough development of model systems with an effective predictive capability. Noble metal (Cu, Ag, Au) low index crystalline surfaces, although regarded as poorly reactive substrates, generally display the occurrence of a static charge transfer to the adsorbed molecules. On Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 145 noble metal surfaces, the mixing of molecular species with complementary affinity leads to the selforganization of ordered structures held together by weak and reversible van der Waals interactions, hydrogen bonds [2], and metal-ligand interactions [3]. In addition, the substrate charge density mediates the molecule-molecule cross-talk, possibly giving rise to the rearrangement of the molecular levels in adjacent molecules, as recently verified for the case of 2D donor-acceptor binary layers on a metal substrate, where suitable substitution of either molecule peripheral atoms yields the formation of a mixed mesh connected through hydrogen bonds [4]. This result could allow the tuning of the relevant molecular interactions by the appropriate choice of molecular species in mixed supramolecular assemblies, a new step towards controlled growth of functional organic nanostructures. However, the hydrogen-bond based structures are inherently fragile because of the weak intermolecular interactions. Stabilization of the supramolecular 2D network in a controlled way directly on a surface through irreversible covalent bonding could overcome these limitations [5]. The investigation of the electronic structure of these 2D donor-acceptor binary networks by synchrotron radiation techniques will be part of this research project. Among common dielectrics, the rutile TiO2 (110) surface is strongly anisotropic and can be exploited to steer the orientation of a growing molecular film due to the presence of periodically spaced rows of oxygen atoms protruding from the surface plane [1]. These oxygen rows are easily reduced in vacuum by thermal desorption of oxygen atoms, which leaves the surface with an excess of charge that is manifested in the valence band photoemission spectrum by the emergence of a defect state in the bandgap close to the conduction band minimum [6]. The conductivity of the TiO 2 surface can thus be tuned via enhancement or quenching of the defect state by adsorption of electron acceptor or donor molecules. Defect-free rutile (110) can also be regarded as a relatively inert substrate suitable to probe the intermolecular interactions and the charge transfer between donor and acceptor layers, since weak van der Waals forces bind the first adlayer on top of the substrate. This substrate represents a suitable candidate for the growth of stacked layers of donoracceptor pairs. With respect to noble metal surfaces, the intrinsic properties of a chosen donoracceptor dyad can be studied already in a single stacked bilayer, since substrate charge transfer can be switched off, in addition a high degree of orientational order might be preserved within the film. References [1] V. Lanzilotto, C. Sanchez-Sanchez, G. Bavdek, D. Cvetko, M.F. Lopez, J.A. Martin-Gago, and L. Floreano, “Planar growth of pentacene on the dielectric TiO2(110) surface”, J. Phys. Chem. C 115 (2011) 4664. [2] Barrena E., de Oteyza D. G., Dosch H., Wakayama Y., “2D Supramolecular Self-Assembly of Binary Organic Monolayers ”, ChemPhysChem 8 (2007) 1915. [3] Barth J. V., Costantini G., Kern K., “Engineering atomic and molecular nanostructures at surfaces ” Nature 437, (2005) 671. [4] D.G. de Oteyza, J.M. Garcia-Lastra, M. Corso, B.P. Doyle, L. Floreano, A. Morgante, Y. Wakayama, A. Rubio, J.E. Ortega, “Modified molecule-substrate coupling in self-assembled donoracceptor nanostructures”, Adv. Func. Mat. 19 (2009) 3567. [5] Sedona F., Di Marino M., Sambi M., Carofiglio T., Lubian E., Casarin M., Tondello E., Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 146 “Fullerene/Porphyrin Multicomponent Nanostructures on Ag(110): From Supramolecular SelfAssembly to Extended Copolymers”, ACS Nano 4, (2010) 5147. [6] P. Krueger, S. Bourgeois, B. Domenichini, H. Magnan, D. Chandesris, P. Le Fevre, A.M. Flank, J. Jupille, L. Floreano, A. Cossaro, A. Verdini, and A. Morgante, “Defect states at the TiO2(110) surface probed by resonant photoelectron diffraction”, Phys. Rev. Lett. 100 (2008) 055501. Objectives for the three years The objectives of the PhD project for the three years include: Learning the functioning and handling of complex experimental apparatuses in order to be able to set up and perform independently a number of experiments based on spectroscopic, diffractive or atomic microscopic techniques. Characterizing the morphology and electronic properties of donor and acceptor molecules on metal or dielectric substrates via a variety of surface probing techniques: x-ray and ultraviolet photoemission (XPS/UPS), resonant photoemission (RPES), x-ray near edge absorption (NEXAFS), photoelectron diffraction (PED), Helium atom scattering (HAS) and scanning tunneling microscopy (STM). Reproducing the x-ray photoemission and absorption experiments by means of numerical simulations based on Density Functional Theory (DFT) and its plane wave implementation in the QuantumESPRESSO package. Objectives for the first year The objectives for the first year are: Theoretical modeling (DFT simulations) of the chemical bonding, core level XPS energies and NEXAFS spectra of systems made up of two organic self-assembled monolayers (SAM) grown on top of each other on a metal substrate (Au (111)). STM measurements on perylene and perylene derivatives (PTCDI, perylene tetracarboxylic diimide) deposited on rutile TiO2 (110) surface in UHV conditions. HAS/UPS study of donor molecules (phthalocyanines and porphyrins) on rutile TiO2 (110) and their interaction with the defect state. Research project Activity 1: study of the monolayer of acceptor (perylene and perylene derivatives) and donor (porphyrins and phthalocyanines, both metal-free and metalated ones) molecules on a metal substrate (Au (110)) and on rutile TiO2 (110) by means of the aforementioned spectroscopic, diffractive and microscopic techniques. Activity 2: study of the vertical stacking of a donor-acceptor bilayer on rutile TiO2 (110). Combination between a carbon-pure molecule (C60 or pentacene) and a nitrogen marked one (PTCDI or porphyrins) will be considered for spectroscopical discrimination. The Au (110) Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 147 substrate will also be considered for the specific cases where the first adlayer binds weakly to it. Activity 3: modeling of the electron dynamics in a monolayer and in a vertically stacked donoracceptor bilayer. The investigation will be performed by means of x-ray spectroscopic techniques, in particular RPES at selected ionization thresholds. Activity 4: describing the electronic properties (core level XPS shifts and NEXAFS spectra) of the monolayers and donor-acceptor bilayers via DFT numerical simulations with the QuantumESPRESSO software package. Gantt chart: Activities Year I Year II Year III 1 2 3 4 Educational activity foreseen Participation in the following schools is foreseen: 1. School on synchrotron and FEL based methods and their multi-disciplinary applications (80 h lectures + computer sessions). Organizers: N. Binggeli, M. Kiskinova, F. Mulhauser. Period: 19 – 30 march 2012. Institution: ICTP. 2. School on numerical methods for materials science related to renewable energy applications (40 h lectures + computer sessions). Organizers: F. De Angelis, S. Fabris, R. Gebauer and N. Seriani. Period: 26 – 30 november 2012. Institution: ICTP. In agreement with my supervisor, in the first year I will replace courses and lectures at university with the study of the following textbooks and articles: 1. J. Stöhr, NEXAFS spectroscopy: Ch. 2, 3, 4, 5, 6, 7, 8 2. C. Brouder, Angular dependence of x-ray absorption spectra J. Phys. Cond. Matt. 2 (1990) 3. D. S. Scholl, J. Steckel, Density Functional Theory: a practical introduction: Ch 1, 2, 3, 4, 9, 10 4. R. Martins, Electronic structure: basic theory and practical methods: Ch 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13 5. References [1]-[6]. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 148 DOMENICO MARSON Email: [email protected] Laboratory: MOSE Title of the thesis: Coupling of experimental and computational approaches for the development of new dendrimeric nanocarriers for gene therapy. Supervisor: Pricl Sabrina Tutors (if any): Laurini Erik Research Activity foreseen State of the art and motivations Recent studies have focused on the application of nanotechnology in the development of nanocarriers for RNA-interference (RNAi) based therapies. In such approach, small RNA sequences (Short Interfering RNA, siRNA) are exploited to switch off specific genes 5. siRNA are promising candidates for the treatment of diseases that today are very difficult to treat pharmacologically, such as inherited genetic maladies (Huntington’s, sickle cell anemia, cystic fibrosis…), tumors, or specific infectious diseases (AIDS, hepatitis…). A major obstacle to the clinic exploitation of small siRNAs is their cell delivery. Indeed, siRNAs need a carrier to protect them while traveling in the bloodstream, and to lead them into the target cells. Nowadays, various kind of carriers have been developed: those based on viral agents are particularly effective, but at the same they are extremely expensive and dangerous for the health of the patient. Therefore, lipids and polymers are presently the most common non-viral vectors under investigation. Dendrimers and dendrons are among the most promising groups of nanocarriers for the purpose of gene delivery. These molecules are a class of polymers characterized by a branched structure and a widely functionalized surface. One of the critical points of these nanocarriers is to find the right balance that allows them to bind effectively to protect the siRNA and to release it near its specific target to perform its function at the same time. The following features are considered essential to determine a good drug delivery sistem: 1. Recognition of the cell or target tissue; 2. Ability to deliver the drug only in the target site; 3. Ability to carry more terapeutic agents. The optimal strategy to achieve the first two features seems today to tie to the nanovector some structures suitable for recognition, such as antibodies. Antibodies are themselves macromolecules, and they could be recognised by the immune system, and so be inactivated. In this perspective, the use of dendrimers/dendrons will also protect the antibodies from their natural degradation. Objectives for the three years 5 (a) G. J. Hannon, Nature 2002, 418, 244-251. (b) M. T. McManu, P. A. Sharp, Nature Reviews, 2002, 3, 737-747. (c) R. Agami Current Opinion in Chemical Biology 2002, 6, 829–834. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 149 One of the objectives of this project is to evaluate the characteristics of the conjugate siRNAdendrimer (or dendrone), and his complexes with antibodies/proteins, in order to improve its properties and to reduce as much as possible the side effects. To achieve this objective, it will be appropriate to exploit molecular simulation techniques for in silico screening and subsequent optimization of the most promising dendrimeric carrier, with the purpose of drastically reducing the time and costs at the developing level. The main objectives for the three years will be: - Investigation of first generation dendrimers/dendrons coupled with a specific ligand, siRNA or antibody. From molecular dynamic techniques is possible to get information at the molecular level (binding free energies, interaction forces, optimal structures...) that would not be possible to achieve with experimental techniques. - Development end refinement of a multiscale protocol to study the interactions between the complex nanocarrier-siRNA and DNA/proteins. - Identification of the molecular parameters critical to optimize the design de novo of second generations nanocarriers. - Development of new models of structure/activity relationships for the design of new generation dendrimers (or dendrons) more effective and selective for the targeted delivery of siRNA. Objectives for the first year - Investigation of first generation dendrimers/dendrons coupled with specific ligand, siRNA or antibody. - Development of a multiscale protocol to study the interactions between the complex nanocarriersiRNA and DNA/proteins. Research project This project could support, exploiting multi-scale molecular modeling techniques, the experimental groups that synthesize dendrimers and dendron as nanocarrier. The intention is to define the molecular characteristics necessary to obain the optimal dendrieric carrier for the transport of siRNA. More specifically, it’s possible to examine the properties of the delivery systems and their interactions with the siRNA, with the purpose of optimize these interactions. The main goals aim to develop computational techniques would be: - Investigation of first generations dendrimers/dendrons coupled with specific ligand or antibody. o The purpose here is, by applying a multiscale simulation strategy, to study the properties of the carriers and their interactions with siRNA. From molecular dynamic techniques is possible to get information at the molecular level (binding free energies, interaction forces, optimal structures...) that would not be possible to achieve with experimental techniques. oThe activity will be mainly focused on the design of dendrimer-protein complexes, the formation of the siRNA/carrier complex, the interactions with the target receptors on the cell and the ability of the carriers to reach an effective therapeutic concentration at their specific target site. - Identification of the molecular parameters critical to optimize the design de novo of second generations nanocarriers. o Based on the results obtained, a second phase can be dedicated to the computer-aided design of new dendrimer/dendrons able to: Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 150 optimize the bonds with the carried molecules; increase the selectivity for the target cells or tissue; increase the release of the siRNA on the target site. - Structure/activity relationships analysis, for the design of new generation dendrimers (or dendrons) more effective and selective for the targeted delivery of siRNA. o The results of molecular simulations could then be directly correlated with the experimental evidences. All this would be done with the ultimate goal of better understanding the molecular mechanism of interaction siRNA/dendrimer that, to date, is not so clear. New models of structure/activity relationship could be developed to aid the design of new dendrimers/dendrons always more effective and selective for the targeted delivery of siRNA. MONTHS YEAR 1 TASKS 1 2 3 4 5 6 7 YEAR 2 8 9 10 11 12 1 2 3 4 5 6 7 YEAR 3 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 Definitions of the characteristics of first generation vectors Development and validation of a multiscale simulation protocol Identification of the critical properties of the nanocarriers Design of second generation vectors Results discussion Research Activity “Catch me if you can: ligand/antibody conjugated PAMAM dendrimer.” RCOM7 Conference. “Nanozapped! DNA and its dendritic nanovectors: a combined in silico/in vitro approach.”, FOMMS 2012 Conference. “Tell Me Something I Do Not Know. Multiscale Molecular Modeling of Dendrimer/Dendron Organization and Self-Assembly In Gene Therapy.”, Current Medicinal Chemistry (in press). “Another brick in the wall. Validation of the σ1 receptor 3D model by computer-assisted design, synthesis, and activity of new σ1 ligands.”, Molecular Pharmaceutics (submitted). “Genes within bottles. Synergism between simulation and experiment in designing nanovectors for DNA/RNA delivery.”, Chemical and Biochemical Engineering Quarterly (submitted). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 151 Educational activity foreseen - “Annual Conference of the Ph.D. School of Nanothecnology.”, January 16-18, 2012, Trieste (Italy) - “Spring course on Powder Diffraction Method for Nanostructured Materials.”, March 15, 2012, University of Trieste (Italy). - “School of Synchrotron and FEL Based Methods and their Multi-Disciplinary Applications.”, March 19-30, 2012, Miramare, Trieste (Italy). - “Nanotechnology Summer School 2012.” - “Machine learning in atomistic simulation.”, September 10-12, 2012, Lugano (Switzerland). - “Tutorial for the AMBER set of modelling tools.”, October 8-12, 2012 Lousanne (Switzerland). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 152 MARYSE DADINA NKOUA NGAVOUKA Email: [email protected] Laboratory: NanoInnovation Laboratory (Sincrotone Trieste) Title of the thesis: Application of AFM based immune assays to few cells proteomics Supervisor: Prof. Giacinto Scoles – Dr. Loredana Casalis Tutors (if any): State of the art and motivations In the last two decades, many researchers in the field of nanotechnology aimed at developing innovative, biosensors capable to investigate gene expression profiling of cells in healthy and diseased organs, crucial in clinical research for the understanding of disease pathology at the molecular level, for identifying new therapies and also, at a more fundamental level, to understand protein pathways and, more generally, the biology of the cell. Most of the existing immunology assays are based on measuring cells and their interactions on a large scale. However, the cellular and molecular complexity of, for instance, a solid tumor microenvironment calls for the need of studing signaling in individual cancer cells [C. Ma et al., Nature Medicine 17, 738 (2011)]. Also, the analysis of circulating tumor cells where there can be as few as one cell in a clinical blood sample requires single cell sensitivity. Test based on mass spectrometry, on ELISA platforms or on standard microarrays requires a too large number of cells and cannot easily approach single cell proteomics. New methods for the examination of single cells from small samples volumes would be therefore of a great help [A. Salehi Rehany et al., Lab Chip, 11, 1256 (2011), J. Choi, ibc, 2, 1— 1(2010)]. The small analyte volume (pL to nL) corresponding to a few cells lysate imposes the miniaturization of the sensor. In the case of arrays, reducing the size of each spot in the array helps, up to a certain limit, also to increase the surface density of the probes and therefore the signal-to-noise (S/N) ratio of the device, and then provide the best sensitivity, especially for proteins present in a low copy number (often the most relevant to the disease). The framework of this project is to develop a device capable of rapid and accurate detection of proteins in rare cells. My work will be about the optimization of a nano-array format recently introduced for the high sensitivity detection of biomolecules, based on AFM (Atomic Force Microscopy) nanografting [Bano F. et al, Nano let. 9(7): 2614-18 (2009); Sanavio B. et al., ACS nano. 4(11): 6607-16(2010)], to show its applicability to the very high sensitivity detection of cancer biomarkers (and, lately, antibody-based cancer drugs). In such nano-arrays protein-capture molecules density and protein orientation can be optimized, avoiding steric hindrance of the bioactive sites, maximizing in this way the biological activity of the proteins and, as a consequence, the sensitivity of the array and last but not least making the protein assay more reproducible. The immobilization and control of the orientations of the immunoarrays will be made by the so-called Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 153 DNA-Direct Immobilization (DDI) of protein/antibody(Ab)-DNA conjugates [Niemeyer C. et al, Angew Chem Int Ed Engl. 40: 3685-88(2001)], on top of DNA nanoarrays. The device is then ready to capture specific proteins present in the cell lysate. In order to optimize the number of protein linked on the surface, I will first characterize the process of DNA adsorption and of DNA hybridization on the nano-spot, at each stage of device development: ssDNA physisorbed on a chip spot, cannot guarantee reproducibility, since there is no control on the number of molecules deposited on the spot, nor on their order (or conformational state, one base of a molecule hybridizing with the complementary base of a next molecule). Covalent or bio-affinity linking of the DNA to the surface is therefore required to satisfy reproducibility requests, together with fine control on the probe density. To discriminate between single-stranded and double-stranded DNA, AFM height profile of the DNA nano-spot can be used: DNA behaves in fact as a mechanical transducer, being the flexibility ratio of ss- and ds- DNA of about 1:40, in standard buffer solution. I plan to study the hybridization process at different ionic strengths, to match the salt type and salt concentration of the particular Ab buffer solution. On the other side, a polymeric microwell devices for trapping single-few cells will be developed, taking care of opportunely functionalize the well surface for optimal cell adhesion and growth. This part of the work will be carried out in collaboration with Stefania Corvaglia (PhD student, Naotechnology School of the University of Trieste, XXV cicle). The two devices, the nanoarray and the microwell, will then be used face-toface to allow for single cell protein analysis. Objectives for the three years We plan to build reproducible and sensitive nanosensors for detecting proteins/antibodies in small volume biosamples (nL or less). The assay will be based on bio-affinity immobilization of protein/antibody on oligonucleotides nanoarrays produced by AFM nanografting. The biorecognition events will be detected via AFM topographic imaging. We aim at: Developing and characterizing the capture of the protein in solution via an immobilized antibody, by the specific choice of the protein-antibody couple. Immobilizing and characterizing of the protein-DNA conjugate from a physico-chemical point of view. Optimizing biosensing protocols (hybridization efficiency, choice of protein-antibody couples, etc.) in order to achieve sensitivity required for single-cell based assays. Exporting our knowledge on other classes of devices based, for instance, on impedance measurements in microfluidic channels and/or micro electromechanical sensors (MEMS). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 154 Objectives for the first year Study of the state of the art through review articles and papers. DNA functionalization by covalent linking to the surface to satisfy reproducibility requests. Detection of DNA hybridization using an Atomic Force Microscope height and compressibility measurements and by means of fluorescence imaging Construction of protein nanoarrays using AFM Nanografting Developement and optimization of functionalization chemistry in order to capture the target cells on the microwell surface . Research project A proposal of the research activity represented in a Gantt diagram: Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 155 GIULIA OTTAVIANI Email: [email protected] Laboratory: Molecular Medicine - International Centre for Genetic Engineering and Biotechnology (ICGEB). Padriciano, 99 - 34149 Trieste, Italy. Title of the thesis: use of nanotechnology for the evaluation of the effect of laser therapy on neoangiogenesis tumor in vivo and in vitro. Supervisor: Dott.ssa Zacchigna Serena Tutors (if any): Dott. Biasotto Matteo Research Activity foreseen State of the art and motivations Oral mucositis (OM) is referred to as one of the worst side effects of radiotherapy (RT) and/or chemotherapy (CT).6,7 The condition results in a continuum of clinical changes that range from erythema and burning of the oral and oropharyngeal mucosa to the development of diffuse and confluent ulcerations. 8 5- 45% of people undergoing CT develop OM, but this percentage rises up to 70- 100% if associated to high doses, bone marrow transplantation and to RT. 9 Old people and females are more subjected to this adverse effect, even if we can also find kind of drug, its dosage and immunosuppression among the main risk factors.10,11,12 OM is so debilitating that it affects the patients’ quality of life, making swallowing, chewing and phonation difficult or even impossible.13,14 Sometimes it is associated to life-threatening complications, such as hemorrhage and infection or even tracheotomy that can lead to reduction or suspension of therapy, thus affecting the outcome of it. Disparity exists between perceived risk and severity of OM, the burdens these cause patients, and the burden upon healthcare system. Sonis et al. report that patients affected by OM need morphine for 5,8 days more and parenteral nutrition for 1,9 days more in respect to patients without OM.15 6 7 Lalla RV, Peterson DE. Oral mucositis. Dent Clin North Am. 2005 Jan; 49(1): 167–184 Treister N, Sonis S. Mucositis: biology and management. Curr Opin Otolaryngol Head Neck Surg. 2007 Apr; 15(2):123–129. 8 Stephen T Sonis; Efficacy of palifermin (keratinocyte growth factor-1) in the amelioration of oral mucositis; Core Evid. 2009; 4: 199–205. Published online 2010 June 15. 9 Trotti A, Bellm LA, Epstein JB, Frame D, Fuchs HJ, Gwede CK et al. Mucositis incidence, severity and associated outcomes in patients with head and neck cancer receiving radiotherapy with or without chemotherapy: a systematic literature review. Radiother Oncol 2003; 66:253-62. 10 Elting LS, Cooksley C, Chambers M, Cantor SB, Manzullo E, Rubenstein EB. The burdens of cancer therapy. Clinical and economic outcomes of chemotherapy-induced mucositis. Cancer. 2003 Oct 1;98(7):1531–1539 11 Vera-Llonch M, Oster G, Ford CM, Lu J, Sonis S. Oral mucositis and outcomes of allogeneic hematopoietic stem-cell transplantation in patients with hematologic malignancies. Support Care Cancer. 2007 May;15(5):491–496 12 Maddireddy Umameshwar Rao Naidu, Gogula Venkat Ramana, Pingali Usha Rani, Iyyapu Krishna Mohan, Avula Suman, and Priyadarshni Roy; Chemotherapy-Induced and/or Radiation Therapy-Induced Oral Mucositis—Complicating the Treatment of Cancer; Neoplasia. 2004 September; 6(5): 423–431. 13 Ohrn KE, Sjoden PO, Wahlin YB, Elf M. Oral health and quality of life among patients with head and neck cancer or haematological malignancies. Support Care Cancer. 2001;9:528–538. 14 Zittoun R, Achard S, Ruszniewski M. Assessment of quality of life during intensive chemotherapy or bone marrow. Psychooncology. 1999 Jan-Feb;8(1):64-73. 15 Sonis ST, Oster G, Fuchs H, Bellm L, Bradford WZ, Edelsberg J et al. Oral mucositis and the clinical and economic outcomes of hematopoietic stem cell transplantation. J Clin Oncol 2001;19:2201-2205. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 156 It is of even greater economic import that the serious outcomes of OM led to significantly more days of hospitalization per cycle: economically significant events. The additional estimated cost per person in case of OM is around $42.749, in patients subjected to hematopoietic stem cells transplantation. Elting et al. consider an increasing cost of 2.725$ per person for each CT cycle in case of grade 1-2 of OM and of 5.565$ in case of grade 3 and 4. This calculation can even be exacerbated in case of concomitant RT/CT. 16 Unfortunately, a standard therapy is still not available. Recent findings confirm that laser therapy can be very useful to manage OM. Many articles mention Laser Therapy (LT) as an innovative approach and confirm that its efficacy is due to intracellular mechanisms involving the mitochondrial chain reactions through chromophores activation by laser light.17,18 Since radiation emitted by level lasers (LL) has shown analgesic, anti-inflammatory and healing properties, they have been widely used in the process of tissue repair, for their wavelength and low densities of energy can penetrate tissues. According to Genovese’s citations,19 the biological effects caused by LL in tissues consist of light energy, which is deposited on the tissues and which become vital energy, thus producing primary effects (direct), secondary effects (indirect), and general therapeutic effects, which promote analgesic, anti-inflammatory, and healing reactions. In detail, laser light increases the releasing of ATP enhancing RNA and DNA formation, fibroblasts proliferation, cytokines, lymphocytes, mast-cells, ROS and PG synthesis.20,21,22 One of the most important consequences of laser light tissues’ stimulation is neoangiogenesis. In fact, the antiinflammatory and anti-edema effects exerted by laser occur through acceleration of microcirculation, resulting in changes in capillary hydrostatic pressure. At the vascular level, LL stimulates proliferation of endothelial cells, resulting in formation of numerous blood vessels and increased production of granulation tissue. It also stimulates vascular smooth muscle relaxation, thus contributing to the analgesic effects of laser therapy.23,24 Together with fibroblasts 16 Linda S. Elting Dr.P.H, Catherine Cooksley Dr.P.H.,Mark Chambers M.D., Scott B. Cantor Ph.D.,Ellen Manzullo M.D., Edward B. Rubenstein M.D; The burdens of cancer therapy; Cancer 200; 98,7:,1531–153. 17 Karu, T.I.; Molecular mechanism of the therapeutic effect of low-intensity laser radiation; LasersLife Sci., 2, 53, 1988. 18 Karu; LOW POWER LASER THERAPY; CH 48, paragraph 48.3.2. 19 Genovese JW. Laser de baixa intensidade: aplicacoes terapeuticas em odontologia. Sao Paulo: Lovise Ltda; 2000. 175p. 20 Karu, T.I., Kalendo, G.S., and Letokhov, V.S.; Control of RNA synthesis rate in tumor cells HeLa by action of low-intensity visible light of copper laser; Lett. Nuov. Cim., 32, 55, 1981. 21 Ronit Lavi, Asher Shainberg, Harry Friedmann, Vladimir Shneyvays, Ophra Rickover, Maor Eichler, Doron Kaplan, Rachel Lubart; Low Energy Visible Light Induces Reactive Oxygen Species Generation and Stimulates an Increase of Intracellular Calcium Concentration in Cardiac Cells; J Biol Chem. 2003 Oct 17;278(42):40917-22. Epub 2003 Jul 7. 22 Chen AC, Arany PR, Huang YY, Tomkinson EM, Sharma SK, Kharkwal GB, Saleem T, Mooney D, Yull FE, Blackwell TS, HamblinM; Low Level Laser Therapy Activates NFkB via Generation of Reactive Oxygen Species inMouse Embryonic Fibroblasts; PLoS One. 2011;6(7):e22453. Epub 2011 Jul 21. 23 Ruthineia Diogenes Alves Uchoa Lins Euler Maciel Dantas Keila Cristina Raposo Lucena Maria Helena Chaves Vasconcelos Catao Ana Flavia Granville-Garcia Luiz Guedes Carvalho Neto Biostimulation effects of low-power laser in the repair process; An Bras Dermatol. 2010;85(6):849-55. 24 Walsh LJ. The current status of low level laser therapy in dentistry. Part 1. Soft tissue applications. Austr Dental J. 1997;42:247-54. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 157 proliferation, these can be considered the most relevant elements of tissue regeneration and wound healing. Also, it is confirmed that laser therapy has an analgesic and antimicrobical effect.25 During the last two years our research group has been dedicated to the study of laser therapy as possible effective remedy for the care of this debilitating cancer treatment side effect. We have already accumulated experience on both animal experimentation, in collaboration with the ICGEB located at Area Science Park, and clinical application of the technique (on over 60 cancer patients visited and treated with the laser therapy at the Division of Oral Medicine and Pathology, at Ospedale Maggiore in Trieste). Both approaches support the effectiveness of laser therapy as a valuable therapeutic aid able to confer analgesia, reduction of inflammation, biostimulation and disinfection of the mucositis lesions. Specifically, the biostimulation has been possible thanks to the neo-angiogenesis given to the injury, which allows a significant reduction of the healing time. The results we obtained during the last two years of study were encouraging and prompted further investigations on the mechanisms of actions of laser therapy, as well as on possible side effects. Objectives for the three years On the basis of the information obtained so far, we propose to: i) investigate the effect of laser therapy on tumour neo-angiogenesis in a mouse model, ii) analyze which genes are involved in this process, and iii) compare the results obtained on animals to the clinical practice, and in particular to the NBI fiberscope, which also essentially evaluates angiogenesis. Objectives for the first year Since angiogenesis is expected to be one of the main achievements of laser biostimulation and may represent an undesired side effect for a patient bearing a tumor of the oral cavity, we will use a carcinogenesis mice-model to verify its effect on tumor-associated angiogenesis, and subsequent tumor growth. A total of 20 C57/B6 female mice with a mean weight of 18-20 g, 4-6 weeks old, will be housed in appropriate sterile cages and fed and given water ad libitum. 4NQO obtained from Sigma-Aldrich will be dissolved in propylene glycol (Sigma-Aldrich) as stock solution (4mg/ml), stored at 4°C, and diluted in the drinking water to a final concentration of 50µg/ml. Water will be changed weekly. To induce oral carcinogenesis, all mice will be given 4NQO in the drinking water for 16 weeks, after which all animal cages will be reverted to regular water and mice will be monitored until week 22. All animals will undergo a biweekly full oral cavity examination under general anesthesia (2-5% isoflurane (Baxter) mixed with oxygen) and pathologic changes will be documented. During the 17th week, the animals will be treated with laser therapy for 4 consecutive days. 25 Karu T; Mechanisms of low-power laser light action on cellular level; Institute of Laser and Informatic Technologies of Russian Acad. Sci., 142092 Troitsk, Moscow Region, Russian Federation. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 158 Tumor-area will be directly irradiated. Laser pointer will be kept one centimeter far from the tongue and continuously moved during therapy. Animals will be euthanized on week 18 and 22 for tissue retrieval. Complete autopsies will be done and tissues will immediately be collected and fixed in buffered zinc formalin at room temperature for 12h. The tissues will be then transferred to 70% alcohol and processed for paraffin embedding for further studies. Histopathological examination will be performed by three independent reviewers. Using this model, we aim to specifically evaluate the role of laser therapy on tumour angiogenesis by perfusing the tumor with fluorescent spheres having a diameter in the 20-200 nm range, followed by quantitative evaluation of the fluorescence and 3D reconstruction f the vascular network by confocal microscopy. Write a description of the objectives to be reached in the first year. Few lines and a bulleted list is sufficient. Research project AIM1. CONSTRUCTION OF A CARCINOGENESIS MICE-MODEL AND USE OF NANOFLUOSFERE TO QUANTIFY VASCULARIZATION. See objectives for the first year. AIM2. SELECTION OF GENES INVOLVED IN LASER-INDUCED NEO-ANGIOGENESIS. Through a diode laser, set on specific wavelengths, cellular genes potentially involved in laser therapy induced-neoangiogenesis, will be studied by high throughput screening (HTS), by exploiting the availability of a whole genome siRNA collection and a HTS facility at ICGEB in Trieste. Cell-based assays for high-content microscopy will be optimized for genome-wide siRNA library screening based on laser-induced proliferation and migration functional assays. Screening with the whole-genome siRNA library targeting the totality of the human annotated genome (18175 genes, pools of 4 siRNA per gene) will then be performed, followed by target validation by standard siRNA pool deconvolution procedures. Genes identified to have a specific effect on endothelial cell function upon stimulation with the three different ligands will be further analyzed by standard bioinformatics tools (Ingenuity Pathway Analysis software), compared and contrasted among the treatments and then followed up individually. The in vivo relevance of the genes identified by HTS will be assessed in vivo using the same model described above. The 5 top siRNA will be administered to tumor-bearing mice undergoing laser therapy, using scramble siRNA oligonucleotides as controls. When the volume of the tumor will reach 100mm3 approximately, siRNA complexes containing 2nmol siRNA will be injected intravenously through the tail vein on days 1, 4, 8, 12 after laser therapy. Mice will then be euthanized on weeks 18 and 22 to discover if the effect of laser therapy has been influenced by the injection of siRNA. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 159 AIM3. VALIDATION OF THE IN VIVO STUDY AND CORRELATION TO NBI FIBERSCOPE. Finally, the results obtained on animals will be compared to the images routinely obtained in the clinics using the narrow band imaging (NBI) fiberscope. This will allow us to analyze neoangiogenesis also with this innovative technique. If it will be validated it would have important implications on clinical oral cancer angiogenesis detection and on early dubious oral lesions, which eventually need to be biopsied. Activity Year 1 Year 2 Year 3 Construction of a carcinogenesis mice-model Use of nanofluosfere to quantify vascularization Cellular genes involved in laser therapy inducedneoangiogenesis studied by HTS Up and down-regulation of genes involved in tumour neoangiogenesis Correlation to the clinical NBI fiberscope Educational activity foreseen The strict collaboration with the Molecular Medicine Laboratory at ICGEB will allow the participation to the main activities organized by ICGEB for PhD students, and in particular to the journal clubs and seminars that might be of interest for the present project (a complete and updated list of Seminars, Meetings and Courses held at ICGEB can be found at http://www.icgeb.org/meetings-and-courses.html and http://www.icgeb.org/seminars.html). In addition, the Student will attend the Department of Oral Medicine and Pathology, located in Ospedale Maggiore, to follow oncological patients during their diagnosis, surgery and prosthetic rehabilitation. Weekly the Student will be exposed to the clinical hospital updating, regarding not only scientific workshop on oncological topics, but also new immunohistochemical techniques to detect and diagnose even earlier oral cancers. The Student will participate to many international and national conferences and lectures on both on molecular and clinical features. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 160 MIRCO PANIGHEL Email: [email protected] Laboratory: Micro and Nano Carbon Lab - Elettra Title of the thesis: Organic Molecules and Carbon Nanotubes Assembled on Metal Surfaces: Properties and Applications in Molecular Electronics and Photovoltaics Supervisor: Prof. Alberto Morgante Tutors: Dr. Andrea Goldoni, Dr. Giovanni Di Santo Research Activity foreseen State of the art and motivations The control of the electronic and magnetic properties of nanostructures adsorbed on metal surfaces is of fundamental importance from both scientific and technological point of view. For example the study of electronic and transport properties of organic molecules, although a relatively recent and not fully developed field, appears highly promising for the emerging spintronics and molecular electronics, as well as for the pure basic research [1-4]. There is huge interest in these molecules as constituents of organic-inorganic interfaces due to their flexibility and peculiar properties. For this purpose ultra high vacuum molecular beam deposition techniques and selfassembly methods allow to engineer bulk molecular materials with long-range ordering. In particular metal phthalocyanines (MPcs) and porphirins (TPPs) are the model candidate of metallorganic complexes due to their ability to coordinate with many elemental ions and to selfassembly on metal surfaces: their molecular framework tunes the interactions between the molecules and the substrate in order to constitute ordered structures on the surface, and brings about interaction between the local magnetic moment of the molecule and the metal. The ability of organic molecules to self-assembly on metal surfaces is particularly important also to produce ordered substrates to be used as templates for the growth of other nanostructures: for example the use of carbon nanotubes (CNTs) for developing high efficiency photovoltaic and photosensitive devices is the main task in the field of organic solar cells; however, this is limited by the difficulty in producing shaped controlled nanotubes, a fundamental requirement to have reproducible and well defined electronic properties. [1] Wende et al., Nat. Mat. 6, 516 (2007) [2] Gambardella et al., Nat. Mat. 8, 189 (2009) [3] Bernien et al., Phys. Rev. B 76, 1 (2007) [4] Bernien et al., Phys. Rev. Lett. 102, 1 (2009) Objectives for the three years Preparation of the substrates for the organic molecules assembling; Study of the electronic and magnetic properties of selected organic molecules adsorbed on metal surfaces; Preparation of host substrates and growth of the CNTs; Characterization of the properties of composited nanostructures from the magnetic and conformational point of view. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 161 Objectives for the first year Upgrade of the experimental apparatus and the control software; Individuation of the most suitable organic molecules for the project; Developing of the preparation techniques; Characterization of the molecules and the initial substrates. Research project The research project will focus on the preparation and study of different organic molecule systems on metal surfaces, and in particular on their electronic and magnetic properties. The ability of these molecules to self-assembly on metal surfaces allow to produce very controllable ordered structures and the coordination with metal ions provides to the system peculiar magnetic properties that can be studied and tuned. During the entire duration of the project will be studied and prepared different organic based nanosystems focusing in particular on molecular electronics and spintronics properties.. In this part will also be used organic molecules to prepare template structures for the preparation of host adsorption sites for the consequent CNTs growth. This synthesis is based on the use of metal or semiconducting surfaces on which the molecules can self-assembly to produce a defined substrate: controlling the geometry of these sites the commonly used chemical vapor deposition technique of CNTs can be simplified and optimized. Synchrotron radiation techniques available at Elettra (XPS, UPS, XMCD) as well as experimental techniques available in the laboratory (EELS, AFM and STM) are require for the characterization of the substrates, the adsorbed organic molecules and the nanostructured materials based on CNTs. The structural characterization will be also performed with scanning probe microscopy techniques (AFM and STM) with the possibility to upgrade the experimental apparatus and the control software. 2012 2013 Experimental apparatus and software upgrade X X X X Preparation of the substrates X X X X Individuation of the organic molecules X X X Characterization of the substrates X X X X Characterization of electronic and magnetic properties of the molecules Preparation of organic molecules hosts X X X X X X Carbon nanotubes evaporation Development of composite nanostructures X X 2014 X X X X X X X Educational activity foreseen During the first year is desirable the attendance at schools and seminars on quantum magnetism, molecular electronics, spintronics, carbon nanotubes growth techniques and deposition techniques in UHV. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 162 LUCA PIANTANIDA Email: [email protected] Laboratory: CNR-IOM Laboratorio TASC Title of the thesis: Plasmonic ruler and the applications to the DNA origami Supervisor: Marco Lazzarino Tutors (if any): Research Activity foreseen State of the art and motivations The DNA origami method, introduced by Rothemund in 2006 [1], allows the design and fabrication of arbitrary 2D and 3D structures of DNA that could be very stable and complex. Starting from one long single strand of DNA, called “scaffold strand”, with the introduction of short oligonucleotides, called Fig.1 (a) Example of a DNA origami design; (b) representation of several shapes created by Rothemund; (c) a DNA origami box with movable lid and (d) many other 3D structures with “staple strands” which force the previous one to fold in a pre-determined way, it is possible to complex create a structure with the desired shape. The staple strands sequence is complementary and not curvatures. redundant to the scaffold sequence, in this way depending on the position and the design of the staple strands, the scaffold assumes the desired shape. Many examples of complex structures have been described in literature [2, 3], while few results have been reported about actuation of movable origami [4, 5]. This technology is suitable to create a scaffold structure operating in the biological liquid environment that provides the structural strength and flexibility necessary for a movable actuator. Furthermore the versatile nature of the DNA allows a great possibility to functionalize the structures, simply adding a modified staple strand sequence, allowing a big range of possible modifications. Recently in our group we have created a 2D DNA origami structure capable of movement after the interaction with a DNA target molecule. It consist of a circular ring with a diameter of 100 nm and an internal part where is allocated the actuator system. Following the hybridization between the DNA target molecule and the actuator in the middle, the internal part moves and change its morphological profile. The DNA origami has been characterized with atomic force microscopy (AFM) and with fluorescence techniques. In spite of the relevant progresses in the structure analysis we were not able to characterize this movement in detail. The speed, the direction, the movement angle and the forces involved are still unknown parameters of the actuation. To elucidate these characteristics we plan to use gold nanoparticles decoration and functionalization and exploit fluorescence and plasmon resonance techniques. This last technique and in particular the localized Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 163 surface plasmon resonance (LSPR) could help to analyze short range distance changes in nanomaterial. The plasmon resonance of a nano-particle depends on the NP material, shape and size. If two NP are placed close to each other, the absorption spectrum is further modified, depending on distance and orientation respect to the light polarization. Since the binding interactions can affect the distances between two parts on an actuator, with this method we can obtain more information also about the binding kinetics. These features make this technique an optimal tool to investigate movements and interactions between two movable parts coupled with metal particles. Furthermore when two nanoparticles are close to each other like in a dimer condition the surface plasmon resonance increase in intensity as a field hot spot, exploiting this field enhancement we can analyze spectroscopy features of the molecule between the two nanoparticle. Objectives for the three years I want to design a tool to characterize and analyze in detailed and precise way the movement and spectroscopy features at the nano-scale in our and other system in biological conditions: Functionalize gold nanoparticle in stable and reproducible way in order to use them in the following parts of the project, and analyze them with different techniques; Create a calibrated nano-plasmonic ruler with gold nanoparticles and decorate the DNA origami structure to investigate the actuation motion; Create a nanoparticles-dimer plasmonic hot spot tool in order to use it in spectroscopy and also detection analysis, expecially in liquid environments; Objectives for the first year In the first year I have to draw up the optimized protocol for the handling of the gold nanospheres and for their functionalization with DNA oligonucleotides . Further I should be able to create the nanoparticle dimers and analyzing them with optical and atomic force microscopy. Research project The project of my research will exploit my knowledge concerning DNA origami characterization and atomic force microscopy analysis in liquid environment to set up a plasmonic tool. The nanoparticles interaction and DNA functionalization are the key point from which I have to start to use them into more complex system as DNA origami. Further in the project I want to investigate the molecular spectroscopy analysis gain that comes from surface plasmon resonance of gold nanoparticle. For this purpose I want to use gold nanoparticle dimers to create a sort of field hot spot in the inter-particle space, that can be used as a molecular ruler and also can enhance spectroscopy features of molecules allocated in. Once I created the hot spot system I can exploit it as a detection tool for target molecules that recognized by the oligonucletide situated between the nanospheres, for instance small RNA molecules. The project is, hence, divided into three main activities: 1.Functionalize gold nanoparticle in stable and reproducible way in order to use them in the following parts of the project, and analyze them with different techniques; 2.Create a calibrated nano-plasmonic ruler with gold nanoparticles and decorate the DNA origami structure to investigate the actuation motion; 3.Create a nanoparticles-dimer plasmonic hot spot tool in order to use it in spectroscopy and also detection analysis, especially in liquid environments; Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 164 The first activity comprise the following tasks: Draw up a complete protocol to handling and successfully functionalize gold nanoparticles to link principally DNA oligonucleotides to obtain dimers; Characterize the nanospheres with electrophoresis technique and microscopy technique; Test the stability and the efficiency of the protocol in different liquid environments; The second activity comprise the following tasks: Create the gold nanoparticle dimers following the protocol; Characterize the dimer ruler with surface plasmon resonance technique and analyze it with microscopy; Calibrate the ruler with different inter-particle distance using different oligonucleotide lengths; Decorate the DNA origami with functionalized gold nanoparticle and investigate the actuation motion with microscopy and surface plasmon resonance techniques; The third activity comprise the following tasks: Create the gold nanoparticle dimers following the protocol; Use the dimers to build a plasmonic hot spot tool and characterize it with spectroscopy and surface plasmon resonance analysis; Create a target-binding core within the dimer to use it as detection tool in liquid environments; Test the dimer detection tool with endogenous molecules; During the project I will use scanning electron microscopy and dark field microscopy to characterize the nanoparticle systems, atomic force microscopy and fluorescence microscopy for the actuation analysis of the DNA origami structure. Further I will use Raman spectroscopy and plasmon resonance analysis to determine the hot spot features. Here I report the Gantt diagram about my research project: Tasks 2012 start end 2013 2014 gen-mar apr-june july-sept oct-dec gen-mar apr-june july-sept oct-dec gen-mar apr-june july-s 1-Functionalize NPs Handling NPs protocol gen-2012 giu-2012 NPs/dimers characterization lug-2012 dic-2014 Stability and environment test ott-2012 giu-2013 2-Plasmonic ruler creation Dimers creation lug-2012 mar-2014 Ruler calibration gen-2013 dic-2013 DNA origami decoration lug-2013 giu-2014 Hot spot system creation gen-2014 dic-2014 Detection tool creation apr-2014 dic-2014 3-Dimer hot spot creation Educational activity foreseen During the first year I would attend the following schools and courses: Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 165 - Preparatory School to the Winter College on Optics: Advances in Nano-Optics and Plasmonics, from 30th january to 3rd february 2012, Miramare-Trieste. - Winter College on Optics: Advances in Nano-Optics and Plasmonics, from 6th to 17th february 2012, Miramare-Trieste. - Spring course on Powder Diffraction Method, 15th march 2012, Trieste. - DNA Nanosensors International Symposium, from 10th to 12th may 2012, Jena-Germany. - Molecular self-assembling and nanostructures doctoral course, date to be define, Trieste. Books that I will study: - Principles of Nucleic Acid Structure, Stephen Neidle, Elsevier-2008. - Surface Design: Applications in Bioscence and Nanotechnology, R.Forch, H.Schonherr, A.T.A. Jenkins (Eds),Wiley-vch. - DNA Nanotechnology: Methods and Protocols, G. Zuccheri and B. Samorì (Eds), Springer Protocols-2011. References 1. Rothemund, P.W., Folding DNA to create nanoscale shapes and patterns. Nature, 2006. 440(7082): p. 297-302. 2. Dietz, H., S.M. Douglas, and W.M. Shih, Folding DNA into twisted and curved nanoscale shapes. Science, 2009. 325(5941): p. 725-30. Douglas, S.M., et al., Self-assembly of DNA into nanoscale three-dimensional shapes. Nature, 2009. 459(7245): p. 414-8. Andersen, E.S., et al., Self-assembly of a nanoscale DNA box with a controllable lid. Nature, 2009. 459(7243): p. 73-6. Kuzuya, A., et al., Nanomechanical DNA origami 'single-molecule beacons' directly imaged by atomic force microscopy. Nat Commun, 2011. 2: p. 449. Marini, M., Piantanida, L., et al., A Revertible, Autonomous, Self-Assembled DNA-Origami 3. 4. 5. 6. 7. Nanoactuator. Nano Lett, 2011/10.1021/nl203217m. Bek, A., et al., Fluorescence enhancement in hot spots of AFM-designed gold nanoparticle sandwiches. Nano Lett, 2008. 8(2): p. 485-90. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 166 PAOLA PITTIA Email: [email protected] / [email protected] Laboratory: Physical and Macromolecular Chemistry – Life Sciences Dept. Univ. Trieste Title of the thesis: PHYSICAL STATE OF SUGAR MATRICES AND AROMA-SUGARS INTERACTIONS AT NANO-SCALE Supervisor: prof. Attilio CESARO Tutors (if any): prof. Dino Mastrocola Research Activity foreseen State of the art and motivations Many natural foods contain nano-scale components (proteins, fats, carbohydrates) and their properties are determined by their structure and how the latter are modified at the nanometer and micrometer scales during food processing. Research into naturally occurring nanostructures in foods is mainly designed to improve the functional behaviour of the food. In the case of the aroma compounds is well acknowledged that, besides the intrinsic characteristics of the aroma itself and the environmental factors, the interactions occurring at molecular level between volatiles and non-volatile compounds (in particular those with macromolecules like proteins, hydrocolloids and carbohydrates) are major factors that limit the release of volatiles and thus their sensory perception as demonstrated by many studies in this field. In the case of carbohydrates, the interactions with aroma compounds have in general a weak energy. Complex saccharides (e.g. starch) have been widely investigated for their role in affecting the release/retention of volatiles in food matrices, while scarce attention has been given to the presence of mono-and di-saccharides. In diluted model systems the presence of the sugars can induce an increase of release for some aroma compounds especially the more polar while an opposite effect was observed for the more apolar as the they structure water molecules thus decreasing the amount of free water in the food matrix. On the other side, in concentrated disaccharide solutions (sucrose, trehalose) it has been evidenced a retention effect (“salting in”) for some aroma compounds attributed to entrapment in hydrophobic regions of the highly concentrated sugars solutions. Limited are also the citations and quite dated about the entrapment of aromas in amorphous and crystalline sucrose systems without the explanation of the interactions at nano- and microscale. Physical (e.g. viscosity) properties of the matrix have been recognized as factors that could affect the liquid-vapor partition and the retention/release of aroma compounds in foods but these factors have been studied only to a limited extent. In sugar-based matrices there is a lack of information of the role of the physical state (amorphous, crystalline) and state and mobility of the matrix on the release of aroma volatile compounds. Specific investigations are also needed to achieve a clear understanding of the interactions occurring at nano-scale that could affect the retention of volatile compounds in sugar matrices. Objectives for the three years Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 167 The general aim of this research project is to achieve knowledge about the role of the physical state of disaccharides and the interactions at molecular scale on the release/retention of aroma compounds by coupling different instrumental methodologies (NMR, FTIR) and spectroscopic diffraction and scattering techniques using synchrotron light source. Gas-chromatographic techniques will be used to test the retention/release of the aroma compounds in the model systems. Objectives to be achieved in the first year - state of the art on the role of sugars on the retention/release of volatile compounds in liquid and solid (amorphous/crystalline) state matrices Identification of process conditions to obtain amorphous sugar matrices able with high volatile retention ability Physical characterization of the amorphous sugar matrices and study of the volatile release as a function of water state and mobility Research project The research project will include the following steps - preparation of amorphous/partly crystalline sugar matrices by using disaccharides (sucrose, trehalose and maltose, as single component or in combination) in presence of volatile aroma compounds at different polarity (ethyl acetate, ethyl hexanoate, linalool, limonene). The use of spray-drying and freeze-drying as well as milling will be investigated. - Characterization of physical properties of the sugar-volatile matrices (calorimetry, FTIR, Raman spectroscopy) - Evaluation of the retention/release of the aroma(s) from the sugar matrices by head space gas-chromatography. Sugar-aroma matrices will be hydrated to achieve different water state and mobility and the retention/release will be related to the correspondent physical properties. Tasks and GANTT Chart 1st YEAR A. 2nd YEAR 3rd YEAR 1 2 4 4 5 6 7 8 9 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 1 2 3 4 5 6 7 8 9 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 G L A S O N D G F M A M G L A S O N D G F M A M G L A S O N B.1 B.2 D G F M A M B.3 C. D.1 D.2 E. A. Bibliographic research B.1 Preparation of freeze-dried and spray dried amorphous Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 168 B.2 Instrumental characterisation of the powders B.3 Release /retention properties of sugar powders C. Internship D.1 Preparation of dried sugar powders by milling D.2 Instrumental characterisation and evaluation of aroma release E. Writing and editing of the thesis Educational activity foreseen – 1st YEAR - PhD Summer School 2012 in Nanotechnology at the University of Udine (25 h) - Attendance at the International Conference CEFFood, 24-26 May 2012, Novi Sad (Serbia) as invited speaker with an oral presentation titled “Role of sugars in flavour release and perception in food matrices” - Attendance to the International Conference EURO Food’s water (Helsinki 4-6 June 2012) - Attendance at the International Conference Frontiers in Water Biophysics, 23-26 September 2012, Perugia (Italy) as invited speaker with an oral presentation. - Visit at the University of Lille 1 (France) for planning experiments of milling - Training at the labs of the Department of Pharmacy of the university of Perugia to prepare dried amorphous sugar matrices. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 169 SIMÃO PEDRO PEREIRA Email: [email protected] Laboratory: The Molecular Simulation Engineering Laboratory Title of the thesis: Multiscale Modelling of Complex Materials Systems Morphology Supervisor: Maurizio Fermeglia Tutors (if any): Research Activity foreseen State of the art and motivations The traditional approach of modelling materials is to employ a simple constitutive equation to embody the material behaviour at the macroscopic level. Such approach may fail when dealing with innovative complex systems, such as thermoplastic nanocomposites, for automotive and energy industries, mainly due to the relevant phenomena that take place at lower length and time scales. Thus, atomistic and mesoscopic are essential to estimate some macroscopic properties of interest, in order to predict the correct behaviour of such materials. The motivation is therefore to develop a robust procedure that enables to study a wide range of complex systems from lower to larger scales, getting the relevant information at each of the intermediate steps of the modelling approach. Objectives for the three years The main objectives of this project are to develop a robust multiscale modelling approach that enables the study of complex system materials with industrial relevance. Major focus shall be given to the morphology of such systems in order to correlate it with properties of interest. Furthermore, experimental assessment of the properties must be compared with the output of the multiscale procedure, for validation purposes. Objectives for the first year The first year must comprise a detailed literature review on multiscale approaches focused on complex systems along with a study of the 3 systems of interest. It must include also a familiarization with the software to be used to perform microscopic and mesoscopic simulations. Computational based studies of the systems under investigation must be carried out. Research project The research project is divided into 5 tasks which are summarized below followed by a Gantt diagram with expected time length of each task. Task I - Code training and preparation This task comprises preparation of the groundwork of the PhD project. The researcher will perform an updated literature review on the subject, namely on the techniques adequate for Multiscale Modelling of complex material systems and as well the systems to be studied. The researcher will be also trained with the computational tools and characterization techniques that will be employed during the PhD project. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 170 Task II - Computational based study of systems under study During this task the researcher will study the behaviour of the selected materials systems using computational modelling tools at the atomistic/mesoscale level, using codes developed for this purpose, namely Culgi ®, Materials Studio and LAMMPS. This study will allow a comprehensive analysis of the morphology of the systems to be investigated. Task III - Experimental assessment of morphology evolution The main conclusions obtained on the previous study will be experimentally assessed in this task. For that purpose the material systems under study will be investigated using adequate techniques. Task IV - Multiscale modelling platform The main objective of this task is to implement the Multiscale Modelling Platform (MMP) that should be able to model the morphology from the molecular to the macro scale for the selected material systems. Task V - Closure This is the final task of the project and will consist in the writing-up and submission of the PhD thesis. Along the project the candidate will produce internal reports and papers describing the developments and these will be compiled into the PhD thesis. 2012 2013 2014 2015 Task I Task II Task III Task IV Task V Educational activity foreseen During the first year, the research must read literature information in order to get familiarized with the topic and also attend workshops. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 171 NICOLA SCOTTI Email: [email protected] Laboratory: Chemical engineering department, Polytechnical School of Turin Title of the thesis: Laboratory evaluation of several nanofilled dental resin composites mechanical and chemical properties Supervisor: Prof. Lorenzo Breschi Tutors (if any): Research Activity foreseen State of the art and motivations The use of nanofilled resin composite in restorative dentistry has markedly increased, supported by the significant advances in resin matrix compositions, improvements in filler particles, and optimization of the polymerization process (1-8). In fact, to improve many properties, the size of filler particles incorporated in the resin matrix of commercial dental composites has continuously decreased over the years, from the traditional to the nano-composite materials (9). However clinical failures due to bulk fractures or recurrent caries are still reported (10-11), probably because of curing problems, shrinkage stress and aging. For this reason, laboratory study focused on conversion degree, depth of cure, hardness, volume shrinkage, wear, surface roughness and gloss, restoration’s fracture resistance prior and after artificial aging must be assessed. The research activity will focus on the above mentioned aspects of several nanofilled and nanohybrid resin composites. Part 1: conversion degree and depth of cure analysis will be performed with Micro FT-IR tests on composites irradiated with different curing lamps (Halogen and LED) and different energy density regimens. The tested hypothesis is that nanofilled composite show an increased depth of cure with low energy density curing process if compared with microhybrid composites. Part 2: mechanical tests, in terms of hardness (Vikers Test), flexural strength, flexural modulus will be performed prior and after artificial aging. Tested composites must be cured with different energy density regimens (same employed in Part 1) at different curing distances (2,3,4,5 mm). The tested hypothesis is that nanofilled resin composites have similar mechanical properties which could be strongly affected by artificial aging than microhybrid composites. Part 3: surface roughness will be tested through mechanical profilometer and atomic force microscopy with and without surface polishing, prior and after artificial aging. The tested hypothesis is that nanofilled composites have lower surface roughness than microfilled composites. However after artificial aging an important increase of surface roughness is expected because of matrix degeneration and filler loss, which is easier in nanofilled than in microhybrid composites. Part 4: mechanical fracture resistance will be tested. Intact teeth will be collected, similar MOD cavities will be performed and filled with composites cured at different curing regimens. After cyclic loading composite margins will be examined and evaluated with SEM to assess marginal integrity. The tested hypothesis is that both nanofilled composites have better marginal integrity than microfilled resin composites, both with ramp curing or high intensity curing. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 172 Ruddell DE, Maloney MM, Thompson JY. Effect of novel filler particles on the mechanical and wear properties of dental composites. Dent Mater 2002;18:72–80. Imazato S. Review: Antibacterial properties of resin composites and dentin bonding systems. Dent Mater 2003;19:449–457. Watts DC, Marouf AS, Al-Hindi AM. Photo-polymerization shrinkage-stress kinetics in resincomposites: Methods development.Dent Mater 2003;19:1–11. Lu H, Stansbury JW, Bowman CN. Impact of curing protocol on conversion and shrinkage stress. J Dent Res 2005;84:822–826. Xu X, Ling L, Wang R, Burgess JO. Formation and characterization of a novel fluoride-releasing dental composite. Dent Mater 2006;22:1014–1023. Kramer N, Garcı´a-Godoy F, Reinelt C, Frankenberger R. Clinical performance of posterior compomer restorations over 4 years. Am J Dent 2006;19:61–66. Wan Q, Sheffield J, McCool J, Baran GR. Light curable dental composites designed with colloidal crystal reinforcement. Dent Mater 2008;24:1694–1701. Park JG, Ye Q, Topp EM, Misra A, Spencer P. Water sorption and dynamic mechanical properties of dentin adhesives with a urethane-based multifunctional methacrylate monomer. Dent Mater 2009;25:1569–1575. Ferracane JL. Current trends in dental composites. Crit Rev Oral Biol Med 1995;6:302–318. Sakaguchi RL. Review of the current status and challenges for dental posterior restorative composites: Clinical, chemistry, and physical behavior considerations. Dent Mater 2005;21:3–6. Sarrett DC. Clinical challenges and the relevance of materials testing for posterior composite restorations. Dent Mater 2005;21:9–20. Objectives for the three years During the three years it’s planned to reach a depth knowledge of laboratory test related to dental resin composites: infrared spectroscopy flexural and hardness tests atomic force microscopy profilometer cyclic loading SEM Moreover, the publication of at least two paper with the collected results are expected. During the first year, Part 1 project (described above) will be completed. Research project May 2012-December 2012: Part 1 sample preparation and FT-IR analysis. Write paper related to results. January 2013 – June 2013: Part 2 sample preparation and mechanical test execution. Write paper related to results. July 2013 – December 2013: Part 3 sample preparation and surface analysis execution. Write paper related to results. January 2014-November 2013: Part 4 sample preparation and fracture resistance test. Write paper related to results. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 173 Educational activity foreseen Participation to National and International meetings on dental materials (American Dental Association for Dental Research, AADR; March 21-24, 2012, Tampa, USA; Congresso Nazionale del Collegio dei Docenti di Odontoiatria, Torino April 12-14, 2012; Congresso Internazionale dell’Accademia Italiana di Conservativa, Riva del Garda May 4-5, 2012; IADR, June 20-23, 2012, Iguacu, Brazil; Annual Meeting of the Academy of Dental Materials, Orlando (USA) September 19-22, 2012) Study of previous published works on dental composite formulation and their use in relation to their filler content; Acquisition of skills in using FT-IR for the calculation of degree of conversion, in elastic modulus and microhardness measurement. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 174 TINA STOKELJ Email: Laboratory: Title of the thesis: Development of new bran fractionation technologies Supervisor: Maurizio Fermeglia Tutors (if any): Research Activity foreseen State of the art and motivations Processing of cereals in food industry generally requires milling to separate grain components: endosperm, germ and bran. Endosperm fraction is used for production of grits, meals and flours, whereas the germ and the bran today still have low value and are commonly used as feed for animals (1). Research is therefore looking towards the potential industrial applications of these two by-products abundant in the bakery industry. Bran is a rich source of fiber, vitamins, minerals and antioxidant compounds, but utilization of the whole bran may have negative impact on food properties (2, 3). Regarding safety, processing, acceptability by consumers and accessibility of the nutrients and bioactive compounds, the food properties could be improved by preliminary fractionation of the bran (4). However, bran is a composite material made up of several tissues and due to the strong adhesion forces these tissues are difficult to dissociate (5). The bran fractions could not be separated efficiently after conventional milling followed by sieving or air classification. Mainly this is due to relatively small differences in particle size, shape and density and because these particles are after milling still composite materials (4, 5). In order to improve bran fractionation processes, the comprehensive Hemery et. al studies (4, 5, 6) emphasized the importance of further investigation of bran structure, compounds responsible for tissue adhesion and engineering methods to change mechanical properties of the bran. Combined investigation of the chemical composition and mechanical properties of bran layers (1, 7) suggested that the major factor controlling mechanical behavior of wheat bran is most probably the degree of arabinoxylan crosslinking. This hypothesis was further supported by immunolabelling method in Philippe et. al study (8). The key component establishing the covalent bridges between arabinoxylan polymer molecules is ferulic acid. Monomer, dimer, trimer and tetramer forms of ferulate derivatives have been isolated from the plant material. The ferulate derivatives align polysaccharide molecules especially, but also connect polysaccharides with lignin and proteins. Through cross-linking of cell wall polymers, ferulate derivatives control the strength, rigidity and extensibility of the plant cell wall (9). Ferulic acid may form different isomers of mono, di and oligomers and their content in the plant material varies between species and varieties (9, 10, 11). 1.Antoine C et. al. 2003. J. Agric. Food Chem., 51: 2026-2033 2.Rose DJ et. al. 2010. J. Sci. Food. Agric., 90: 915–924 3.Schafter MAM and Zambik ME. 1978. J. Food Sc., 43: 375-379 4.Hemery Y, 2007. Journal of Cereal Science, 46: 327–347 5.Hemery Y et. al. 2011. Journal of Cereal Science 53: 1-8 6.Hemery Y et. al. 2011. Journal of Cereal Science 53: 9-18 7.Peyron S et. al. 2002. Journal of Cereal Science, 36: 377-386 8.Philippe S et. al. 2007. Planta, 225: 1287-1299 9.Bunzel M 2010. Pytochem. Rev., 9: 47-64 10.Andreasen M et. al. 2000. J. Agric. Food Chem., 48: 2837-2842 11.Lempereur I. 1998. Journal of Cereal Science, 28: 251-258 Objectives for the three years The main objectives of this PhD project are to obtain a better understanding of the structure and properties of bran material by the tools of molecular modeling with a special focus on the ferulate cross-linking, and to develop new bran fractionation technologies. The main goals of the project are: To evaluate the binding energy in ferulate derivatives by molecular dynamics and atomistic simulation Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 175 To measure the content of the ferulate derivatives in bran samples of different cereal species or varieties To evaluate the mechanical properties of the same bran samples To find the correlation between the results of molecular modeling, content of ferulate derivatives and mechanical properties of the bran To propose how the bran properties could be modified in order to improve tissue dissociation during milling To approve new separation principles by milling experiments of the same bran samples resulting in efficient bran fractionation. Obbiettivi da raggiungere per il primo anno The objectives to be reached in the first year are: To do a literature overview To learn the theory lying behind the molecular modeling Molecular modeling To design and perform laboratory experiments for bran structure and mechanical properties examination If time permits, to perform some milling experiments Research project Task 1: Literature overview The PhD project should be started by doing a comprehensive literature overview resulting in a concise report based on the scientific publications about the bran structure, mechanical properties and ferulate cross-linking in plant material. A special focus should be given to the research dealing with tissue adhesion and ferulate cross-linking. Task 2: Understanding of the structure and properties of bran material by molecular modeling Based on the literature overview, the associations of interest should be investigated by the molecular dynamics and atomistic simulation. The estimates of the association’s binding energies should be compared to the results of bran chemical composition and mechanical properties previously reported in the literature. It is here hypothesized, that one or more associations will be strongly correlated thus suggesting they importantly influence the mechanical properties of bran and its layers. Task 3: Characterization of the structure and properties of bran material by one or multiple powerful techniques Based on the results of molecular modeling, a series of experiments should be designed in order to validate the proposed correlation between the structure and mechanical properties of the bran. Two things that should be determined experimentally are: - Content of the ferulate derivatives in the bran samples - Mechanical properties of the bran samples. Multiple methods may be used, such as biochemical analyses, nuclear magnetic resonance, Raman spectroscopy, atomic force microscopy, Fourier transform infrared spectroscopy, traction mechanical tests, etc. The methods used should be carefully chosen based on the literature overview and previous research done in this field. Task 4: Milling experiments of the engineered bran material and separation efficiency evaluation With better understanding of the adhesion at the molecular level and with better understanding of mechanical properties of the bran, the new methods to break the linkages responsible for adhesion will be proposed. The bran material will be engineered prior milling and the bran fractions will be separated by carefully chosen techniques. The proportion of bran layers in different fractions could be measured by several techniques, such as FTIR or biochemical analyses. Task 5: Discussion and dissemination The last task includes the preparation of the reports, presentations and scientific publications, to present the research findings to the wide scientific public. This task should be given attention all the Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 176 time in order to facilitate the research progress and to support it with the opinions and advices of the professionals with different backgrounds. Figure 2 bellow demonstrates the connection between the main tasks of the project, and Figure 3 is a Gannt chart showing a provisional project time schedule. Task 1: Literature search Task 2: Task 3: Molecular modeling Experimental characterization Task 4: Experimental studies on separation Task 5: Discussion and dissemination Figure 2: Connection between the main tasks of the project Figure 3: Gannt chart demonstrating the time schedule of the PhD project Educational activity foreseen The educational activity during the first year should include: Learning a theory lying behind the molecular modeling Learning how to use the computer software Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 177 ALEX STOPAR Email:[email protected]; [email protected]. Laboratory:Nanomedicine laboratory at Experimental and Clinical Pharmacology Unit, Centro di Riferimento Oncologico, Aviano. Title of the thesis: Innovative Tools for Pharmacogenetics and Pharmacogenomics: ProteinNucleic Acid Interactions Within Self-Assembled Nanosystems Supervisor:M.D. Giuseppe Toffoli Tutors (if any): Dr. Matteo Castronovo and Dr. Flavio Rizzolio Research Activity foreseen State of the art and motivations Pharmacogenomics is an helpful tool in medicine to increase the efficacy and reduce the toxicity of pharmacological treatments1. Several common functional genetic variations (polymorphisms) within intronic and gene regulatory regions could affect transcription factor activity by interfering on their protein-nucleic acid interactions. The estrogen receptor transcription factor is a drug-target for treating several and diverse diseases such as obesity, diabetes and cancer2. The molecular mechanism of action of these drugs (e.g. tamoxifen, raloxifene) can be exclusively investigated within in vitro, diluted solutions where the crowding conditions that are found in any biologically relevant environment (e.g. cells or cellular lysates) are not reproduced. In turn, defining the effect of drugs and genetic variations on protein-nucleic acid interactions within more realistic systems holds great importance. Innovative, nanotechnology-based approaches to detect biomolecular interactions at single molecule level such as fluorescence-3, atomic force microscopy-4 and optical tweezersbased techniques 5 have been developed. The reaction mechanism of DNA endonucleases within surface-bound, laterally confined self-assembled monolayers of short DNA probes (DNA LCSAMs), was recently investigated by Castronovo and co-workers6. In this work, enzymatic restriction reactions were monitored by atomic force microscopy (AFM)-based measurements of the topographic height changes on LC-SAMs as a function of the DNA surface density6,7. This approach can potentially allow the investigation of (at least a subset of) protein-nucleic acid interactions in the presence of molecular crowding. (Aim1) In my project I aim to characterize the interaction between a transcription factor and a polymorphisms-containing DNA probe using the approach developed by Castronovo and coworkers6. (Aim 2) Self-assembled DNA nanostructures (DNA origami)8are emerging, water-soluble nanomaterials with potential applications in the field of biomolecular detection and drug delivery9,10. Their successful application in nanomedicine requires knowledge of their susceptibility towards enzymatic degradation in complex biological mixtures. It was shown that DNA origami retain higher stability in cellular lysates in comparison to linear DNA strands11,12, as they appear to be less susceptible to non-specific enzymatic digestion. For instance, they have been shown to serve as delivery systems in mammalian cultured cells13. In my project I aim to assess the stability of water- Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 178 soluble DNA nano-assemblies in biological samples. Water-soluble DNA nanostructures have the potential to extend the research program relative to Aim 1. In conclusion, by accomplishing these aims, I plan to develop novel, very complementary, labelfree tools for the functional characterization of genetic polymorphisms that are relevant to pharmacogenomic studies. Objectives for the three years AIM 1. Characterize the formation of transcription factor complexes on surface-bound DNA nanostructures: DNA LC-SAMs generation; Mechanochemical analysis of DNA-transcription factor binding; DNA-transcription factor interactions in purified solution; DNA-transcription factor interactions in complex biological sample. AIM2. Characterize the biochemical reactivity of water-soluble DNA nanostructures: DNA nanostructures generation; Biochemical reactivity of DNA nanostructures in purified solution; Biochemical reactivity of DNA nanostructures in complex biological mixtures. Objectives to achieve in the first year DNA nanostructures will be designed by a CaD software. Generation of the DNA nanostructures. Setup of folding condition. DNA nanostructures will be assessed for its stability at room temperature by gel electrophoresis. Generation of DNA LC-SAM by nanografting with different DNA sequences to asses sequence binding specificity of transcription factor. Mechanochemical characterization of DNA LC-SAM by AFM. Assessment of molecular crowding changes by protein binding on DNA LC-SAM. Mutagenesis of DNA probe sequence to assess its role in DNA-transcription factor binding affinity. Drug effect assessment on DNA-transcription factor binding affinity. Research project Aim 1. Characterize the formation of transcription factor complexes on surface-bound DNA probes that mimic genomic polymorphism-containing regulatory regions. DNA LC-SAM generation. Single strand (ss)DNA LC-SAMs will be created using AFM nanomanipulation method, the nanografting an alkylthiol-modified ssDNA within a bioresistant ethylene-glycol-terminated SAM on an ultra-flat gold surface. Conversion to the double strand (ds)DNA form will be accomplished by adding the complementary ssDNA. The LC-SAM height will be measured as a function of the ssDNA-to-dsDNA transition, and also as a function of DNA length and density14. Specifically, LC-SAMs containing ssDNA of increasing length will be measured for height before and after addition of the complementary ssDNA. It is anticipated that (i) there will be a height increase upon duplex formation, and (ii) there will be a direct correlation of dsDNA height with the length of the duplex. Mechanochemical analysis of DNA-transcription factor binding. DNA-transcription factor interactions will be assessed by monitoring changes in height and friction over the LC-SAMs as a function of the DNA density. It is anticipated that (i) there will be a height increase when protein-dsDNA binding occurs, and (ii) the formation of a dsDNAprotein complex may change the mechanochemical properties of the LC-SAM contact Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 179 interface with the AFM tip, and (iii) the latter can be detected by AFM-based lateral force microscopy (LFM) as previously reported15. As a control, DNA-protein binding reactions will be measured in solution with the standard analytical methods (DNA Pulldown assay and EMSA). DNA-transcription factor interactions measured using purified components. Basic transcription models will be assessed, using the estrogen receptor transcription factor (ER). DNA probes containing ER-specific binding sequences will be immobilized within LC-SAMs. The DNA-ER interaction will be studied using solutions containing purified recombinant ER. ER binding will be assessed as a function of tamoxifen concentration, a drug that binds ER and induces a conformational change that may affects DNA binding (http://www.pdb.org/pdb/101/motm.do?momID=45). Polymorphism-containing DNA probes also will be used, and ER-DNA binding will be assessed as a function of position and length of the polymorphism within the DNA sequence. It is anticipated that the ER recognition sequence is less than 10 bp and therefore DNA probes of 30-50 bp can be used in this study2. DNA-transcription factor interactions using complex biological samples. The experiments described above also will be performed with cellular lysates of cultured cells. ER concentrations will be determined with Western Blot analysis. Control experiments will be performed using cellular cultures pre-treated with tamoxifen. As control, cultured cell lines that do not express the transcription factor will be used. Expected results. The ER transcription factor 1 (ER1) is a 66.23 KDa monomer (http://www.uniprot.org/uniprot/P03372). ER isoforms bind to DNA as homodimer or heterodimer16. The molecular weight of dimers is ~100 KDa, and their physical dimensions range between 5 and 10 nm. In contrast, the average DNA-DNA distance within LC-SAMs that are accessible to restriction enzymes dimers (MW≈50-60KDa) is less than 10 nm (density < 1012 molecules/cm2)6. In turn, it is expected that ER-DNA binding will cause a significant increase in biomolecular density of in the steric hindrance within the LC-SAMs, that is expected to lead to a detectable height increase of the LC-SAMs. It is also expected that the ER-DNA interaction will be detectably affected by the presence of tamoxifen in solution, or polymorphism in the DNA probes. Furthermore, it is expected that the DNA-ER recognition will depend on the DNA surface density. The addition of tamoxifen after DNA-ER interactions are established in the LC-SAM, followed by time-resolved AFM imaging will inform on the kinetics of ER-DNA dissociation in complex biological samples. Potential Problems & Alternative Strategies. DNA LC-SAMs may exhibit a reduced stability in the presence of cellular lysates, due to the presence of DNA nucleases. In this case, we will introduce ssDNA and/or dsDNA molecules of varying length, that do not bind the transcription factor under investigation. These nonspecific DNAs are expected to function as “traps” for nucleases. Their presence will slow down the nuclease activity on the surface. Alternatively (or in addition), cellular lysates can be appropriately diluted. For longer DNA probes within LC-SAMs, the expected height increase may be less than expected. In this case we will add antibodies that bind the transcription factors. In addition, fluorescence from labeled antibodies can be monitored for LC-SAMs larger than a few tens of microns. Alternatively, dsDNA intercalating fluorescent molecules (e.g. SYBR® Green) can be used to quantify the percent of unbound DNA within the LC-SAM. Experiments in complex biological mixtures may be affected by non-specific protein binding to DNA probe. In this case, we will use nuclear extracts separated from cellular lysates with standard molecular biology methods17. Aim 2. Characterize the biochemical reactivity of water-soluble DNA nanostructures. DNA nanostructures origami generation. Approximately 200 staples can be located within a 60×90 nm tile, limiting the density to 3.7×1012 molecules/cm2. According to the Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 180 work of Castronovo and co-workers, the access of restriction enzymes within surfacebound LC-SAMs is inhibited at dsDNA densities higher than 0.5×1012 molecules/cm2 6. The length of staples is limited by synthesis (100 bases). Approximately 30 bases are hybridized within the 2D structure of the origami and, therefore, the maximum length DNA forming the brush is < 70 bases. In turn, the susceptibility to enzymatic digestion of these DNA origami can be modulated. Analysis of the biochemical reactivity in solution of DNA origami in purified form. DNA staples forming the brush on the DNA origami will be converted to dsDNA by hybridization with fluorescent-labeled ssDNAs. For studying endonucleases (e.g. BamHI or DpnII) in purified solution, dsDNAs in the brush will contain a restriction site, half-way between the origami and the topmost brush-solution interface. After enzymatic reaction, fluorescent labels (e.g. AlexaFluo488) will leave the origami and will be easily separated from the latter with spin column filtration. The eluted buffer will be measured for fluorescence. In turn, the reaction efficiency will be accurately quantified and correlated to the aforementioned structural parameters of the DNAorigami. The size distribution of DNA fragments will be monitored by SDS-PAGE electrophoresis, using standard molecular biology methods. The DNA origami will be similarly collected after the reactions. The mobility in agarose gels will be compared to that of the non-reacted DNA origami. Enzyme digested origami are expected to display higher mobility. Analysis of the biochemical reactivity of DNA origami in complex biological mixtures. If the experiments described above demonstrate the nuclease reactivity of purified DNA origami in solution, similar experiments will be conducted in the presence of the cellular lysates. Biological samples used in the experiments described in Aim 1 can be used here. An ER-binding DNA sequence will be included in the DNA brush flanking the origami, in close proximity to a restriction reaction site. In this way, the ER-DNA binding could be assessed within DNA origami by measuring changes in susceptibility to enzymatic cleavage with respect to control origami that lack the ER binding site. Expected Results. Our approach will introduce a novel methodology to investigate DNA origami, and will provide structural information to study their biochemical behavior. Although, AFM can be used to morphologically characterize the quality of the DNA origami synthesis, most of experiments will not rely on AFM, thus avoiding its current limitations. Furthermore, the fluorescence-based and electrophoresis-based analysis of DNA fragments produced by enzymatic digestion both represent rigorous quantitative approaches. Potential Problems & Alternative Strategies. Working DNA origami concentration is limited to about 10 nM in solution. Fluorescence detection can be problematic for concentrations < 100 nM. The actual concentration of labeled DNA probes in solution is, in the case of complete enzymatic cleavage, TWO orders of magnitude higher than the one of origami (i.e. about 1 µM). In this way we expect to detect cleavage efficiency higher than 10%. In the case that “brushy” origami are difficult to produce with long staples, we will generate the brush by attaching preformed dsDNAs to preformed origami. For instance thiol-modified dsDNAs could be covalently attached to short, amine-modified ssDNA staples via commercially available protocols (sulfo-SMCC, Pierce). Alternatively, we will assess the biochemical activity of DNA origami as a function of compactness by generating DNA origami with a progressively decreasing amount of staples (without staples, the origami do not form, and the linear DNA is highly accessible to enzymes). Timetablefor Project DNA LC-SAMs generation Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 Year 1 Aim 1 Year 2 Year 3 181 Mechanochemical analysis of DNA-transcription factor binding DNA-transcription factors interactions in purified solutions DNA-transcription factors interactions in complex biological samples DNA nanostructures generation Biochemical reactivity of DNA nanostructures in purified solution Biochemical reactivity of DNA nanostructures in complex biological Aim 1 Aim 1 Aim 1 Aim 1 Aim 1 Aim 1 Aim 2 Aim 2 Aim 2 Aim 2 mixture Educational activity foreseen My educational activity will consist of developing the knowledge of the literature in the field of AFM and AFM-based techniques and in the field of DNA nanostructures by review reading. I would like to participate in meeting, seminars and courses in field of Nanomedicine and DNAbased nanotechnology. There I put seminars and meeting that I plan to participate: Summer school on nanotechnology (~ first week of July- 4 days long) International Symposium “DNA-NanoSensors”; May 10-12, 2012; Jena (Germany) Educational activities carried out up until now, seminars and meetings: Annual Meeting of PhD School in Nanotecnology; January, 16-18 (9 hours), Prof. Maurizio Fermeglia. “CD38 in Leucemia Linfatica Cronica: dieci anni dopo”; February, 10 (1 hour); Dr. Fabio Malavasi. “Molecular Modeling as a Tool for Life- and Nano-Science: the Interesting Features of Dendritic Molecules”; February, 13 (1 hour); Dr. Giovanni Maria Pavan. “Spontaneous And Coherent Raman Scattering for Biomedical Applications”; February, 13 (1 hour); Dr. Michele Casella. Spring Course on Powder Diffraction Methods; March, 15 (4 hours); Prof. Norberto Masciocchi and Prof. Antonietta Guagliardi. “Short Peptides As Biosensor Transducers”; April, 4 (1 hour); PhD student Silvia Pavan “Circulating Tumor Cells: Current Detection Systems, their Shortcomings, our Solutions and Future”; April, 10 (1 hour); Prof. Giacinto Scoles and Dr. Daniela Ceselli. YRCA Annual Meeting 2012; April, 12 (8 hours); Dr. Riccardo Spizzo. Bibliography 1. Cecchin, E. et al. Predictive role of the UGT1A1, UGT1A7, and UGT1A9 genetic variants and their haplotypes on the outcome of metastatic colorectal cancer patients treated with fluorouracil, leucovorin, and irinotecan. Journal of clinical oncology 27, 2457-65 (2009). 2. Gronemeyer, H., Gustafsson, J.-A. & Laudet, V. Principles for modulation of the nuclear receptor superfamily. Nature reviews. Drug discovery 3, 950-64 (2004). 3. Tafvizi, A., Huang, F., Fersht, A.R., Mirny, L.A. & Oijen, A.M.V. A single-molecule characterization of p53 search on DNA. PNAS 108, (2011). 4. Lyubchenko, Y.L. & Shlyakhtenko, L.S. AFM for analysis of structure and dynamics of DNA and protein – DNA complexes. Methods 47, 206-213 (2009). 5. Wagner, C. et al. DNA condensation by TmHU studied by optical tweezers, AFM and molecular dynamics simulations. Journal of biological physics 37, 117-31 (2011). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 182 6. Castronovo, M. et al. Two-dimensional enzyme diffusion in laterally confined DNA monolayers. Nature communications 2, 297 (2011). 7. Castronovo, M. et al. Control of steric hindrance on restriction enzyme reactions with surface-bound DNA nanostructures. Nano letters 8, 4140-5 (2008). 8. Rothemund, P.W.K. Folding DNA to create nanoscale shapes and patterns. Nature 440, 297302 (2006). 9. Douglas, S.M., Bachelet, I. & Church, G.M. A logic-gated nanorobot for targeted transport of molecular payloads. Science (New York, N.Y.) 335, 831-4 (2012). 10. Chhabra, R., Sharma, J., Liu, Y., Rinker, S. & Yan, H. DNA self-assembly for nanomedicine. Advanced drug delivery reviews 62, 617-25 (2010). 11. Keum, J.-W. & Bermudez, H. Enhanced resistance of DNA nanostructures to enzymatic digestion. Chemical communications (Cambridge, England) 7036-8 (2009).doi:10.1039/b917661f 12. Mei, Q. et al. Stability of DNA origami nanoarrays in cell lysate. Nano letters 11, 1477-82 (2011). 13. Walsh, A.S. et al. ARTICLE DNA Cage Delivery to Mammalian Cells. 5427-5432 (2011). 14. Mirmomtaz, E. et al. Quantitative study of the effect of coverage on the hybridization efficiency of surface-bound DNA nanostructures. Nano letters 8, 4134-9 (2008). 15. Staii, C., Wood, D.W. & Scoles, G. Verification of biochemical activity for proteins nanografted on gold surfaces. Journal of the American Chemical Society 130, 640-6 (2008). 16. Brzozowski, A.M. & Pike, A.C.W. Molecular basis of agonism and antagonism in the oestrogen receptor target genes . Transcriptional regulation arises from the direct. Nature 753-758 (1997). 17. Dignamr, J.D., Lebovitz, R.M. & Roeder, R.G. Volume 1 1 Number 5 1983 Nucleic Acids Research Nucleic Acids Research. Nucleic Acids Research 1, 1475-1489 (1983). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 183 LORENA TARUSHA Email: [email protected] Laboratory: 247, building C11 Title of the thesis: “Novel nanostructured biomaterials for biomedical applications” Supervisor: prof. Paoletti Sergio Tutor: dott. Andrea Travan Research Activity foreseen State of the art and motivations The research project that will be treated during this thesis aims to produce a biomaterial for anastomotic leakage prevention in cases of colorectal cancer (CRC) resection. Actually CRC is the second most common form of cancer and its management requires surgery with resection of the affected bowel segment and suture of the extremities to restore the normal bowel transit (anastomosis)1. The surgeon typically performs the anastomosis by handsewing or stapling techniques. The most frequent and feared post-operative complication is the Anastomotic Leakage (AL) which occurs when no proper and rapid regeneration of the intestinal tissue takes place at the site of the anastomosis5. The clinical consequences of AL vary from generalized peritonitis requiring abdominal reoperation to a more localized leak that may be drained or to a subclinical leak detected merely on contrast radiology2. In addition to higher costs and longer hospitalization, AL is associated with significant increase in local recurrence of cancer and decrease in long term patient survival8. It has been reported in the intestine environment that butyric acid has the ability to preserve colonic mucosa integrity and homeostasis although in the distal colon its availability is low. Till now some studies report an alteration on butyric acid concentrations in colonic inflammation diseases4. Recently, butyric acid was shown to reduce AL on rat models7. At present, efficient treatments or drugs to prevent the onset of AL are still not available although different trials have been made using biomaterials which were not been designed for this specific application. A reinforcement with a material that wraps the anastomosis triggering tissue healing is considered an ideal solution by surgeon6. Such external reinforcement can be released by the stapling device or applied exogenously to the staple line. The material should be in form of a patch or sleeve, biocompatible, water swellable and easy to handle also in connection to laparoscopic techniques. It has to be a material that does not cause adhesion between viscera and abdominal wall which can lead to inflammation and infection. The biomaterial should posses proper mechanical properties because of the peristaltic movements of the intestine which will stress the material. An additional feature of such materials would be to posses antibacterial activity without being cytotoxic. Objectives for the three years Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 184 The main research line will aim at the development of an engineered bioresorbable biomaterial capable of promoting a safe anastomosis during the critical period of tissue healing without causing adverse reactions. The biomaterial will be based on natural polysaccharides such as alginate and Hyaluronic acid (HA), polymers already used in several medical applications. HA modified with butyric acid (HAbut)3 will be inserted into the formulation in order to explore its biological activity. The main objectives for the three years are listed below: production of nano-engineered materials, composed of alginate and HA and/or HAbut in form of a patch; mechanical and physico-chemical characterization of patches; in vitro tests on fibroblasts, colonic and colonic smooth muscle primary cells with particular attention to biocompatibility, cell proliferation and other biological effects like phenotypic protein expression; introduction of antimicrobial silver nanoparticles into the patches; study of the effect of carbon nanotubes on the mechanical properties of polysaccharidebased materials; In vivo studies of the biomaterials on animal models; Objectives for the first year The objectives to be achieved during the first year are the following: production of a first generation of patches with alginate and HA using various polymers concentrations, HA with different molecular weights and different gelation methods; analysis of the structure and mechanical characterization of the construct; development of the analytical tools to detect the release of HA from patches; in vitro biological tests in order to study the effects on cell vitality, proliferation and biological activity of the single components of the patch; Calcium ions in the presence of glycerol will be used for alginate-based hydrogel production. The gel will then be converted in a membrane through freeze-drying techniques. The research will proceed with characterization of gels in terms of interaction of polymers, mechanical resistance and structure through SEM, Rheology and spectroscopy. During the first year in vitro effects of HA, HAbut and butyrate on cells will be studied introducing each component in the cell medium. Research project The research project foresees the production of different patches through steps that include: a 1 st generation patch that consists in a freeze-dried gel made of alginate and HA and a 2nd generation patch with the substitution of the HA with HAbut or a mixture of HA and HAbut. As a side track, silver nanoparticles and carbon nanotubes will be used to obtain nanocomposite biomaterials. Morphological, mechanical and physico-chemical characterizations will be performed. In addition, the effects on eukaryotic cells will be studied in vitro and a final in vivo study will be made for both 1st and 2nd generation patches. The activities and tasks of this project are listed below: 1. 1st generation patch production and characterization: production of patches with alginate and HA with various polymer concentrations, HA with different molecular weights and different gelation methods; Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 185 2. 3. 4. 5. 6. 7. structural characterization through SEM and μCT analysis; mechanical characterization through rheological techniques and universal testing machine; testing of the release of HA from patches through circular dichroism and fluorescence spectroscopy; In vitro biological tests: effects on cell vitality of the single components of the patch through biological assays (AlamarBlue test, MTT etc.); effects of the single components on cell activity like matrix production through biological assays (Elisa tests, western blotting etc.); In vivo studies of the 1st generation patch in animal models; 2nd generation patch production and characterization: introduction in the 1st patch formulation of HAbut with various polymer concentrations, molecular weights and different degree of substitution; structural characterization through SEM and μCT analysis; mechanical characterization through rheological techniques and universal testing machine; testing of the release of HAbut from patches through circular dicroism and fluorescence spectroscopy; In vitro biological tests: testing of effects of HAbut on cell viability and activity; In vivo studies of 2nd generation patch in animal models; Development of polysaccharide-based nanocomposites that exploit the properties of silver nanoparticles and carbon nanotubes. 1st year 2nd year 3rd year 1st generation patch production and characterization In vitro biological tests In vivo studies on animal models 2nd generation patch production In vitro biological tests In vivo studies of the 2nd generation patch Development of polysaccharide-based nanocomposites with silver nanoparticles and carbon nanotubes Educational activity foreseen “Self assembling monolayers of DNA”, Matteo Castronovo (Centro di riferimento oncologico di Aviano, Farmacologia Sperimentale e clinica; 3.02.2012; 1h) Spring course on Diffraction Methods for Nanostructured Materials. Norberto Masciocchi and Antonietta Guagliardi, Università dell’Insubria (15.03.2012; 4h) Nanomicroscopies ( Modulus 1 of “Nanotechnologies and nanomicroscopies” course of the degree in Medical Biotechnology, CV Nanotechnology, Dr. Carlo Dri; 24h) Biopolymers (part of “Biophysics” course of the Master Degree in Medical Biotechnology, Curriculum Nanotechnology, prof. Sergio Paoletti; 32h) Other courses or schools Reference List Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 186 1 2 3 4 5 6 7 8 Rajput Ashwani and Bullard Dunn Kelli, "Surgical Management of Rectal Cancer,"in 34 ed.2007), pp.241-249. C. R. Asteria, et al., "Anastomotic leaks after anterior resection for mid and low rectal cancer: survey of the Italian Society of Colorectal Surgery," Tech Coloproctol 12(2), 103 (2008). Ref Type: Journal D. Coradini, et al., "Hyaluronic acid as drug delivery for sodium butyrate: improvement of the anti-proliferative activity on a breast-cancer cell line," Int J Cancer 81(3), 411 (1999). Ref Type: Journal H. M. Hamer, et al., "Effect of butyrate enemas on inflammation and antioxidant status in the colonic mucosa of patients with ulcerative colitis in remission," Clin. Nutr. (2010). Ref Type: Journal Y. H. Ho and M. A. Ashour, "Techniques for colorectal anastomosis," World J Gastroenterol. 16(13), 1610 (2010). Ref Type: Journal J. Hoeppner, et al., "Small intestinal submucosa for reinforcement of colonic anastomosis," Int J Colorectal Dis 24(5), 543 (2009). Ref Type: Journal A. J. Mathew, et al., "The Effect of Butyrate on the Healing of Colonic Anastomoses in Rats," 23(2), 101 (2010). Ref Type: Journal C. S. McArdle, D. C. McMillan, and D. J. Hole, "Impact of anastomotic leakage on long-term survival of patients undergoing curative resection for colorectal cancer," Br. J Surg 92(9), 1150 (2005). Ref Type: Journal Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 187 MARIENETTE MORALES VEGA Email: [email protected] Laboratory: Title of the thesis: Raman and fluorescence spectroscopy of biomedical nanomaterials Supervisor: Valter Sergo Tutors (if any): Vanni Lughi Research Activity foreseen State of the art and motivations Raman spectroscopy is an analytical technique that has been very useful in the analysis of materials. One general limitation of conventional Raman spectroscopy, however, has been the weakness of Raman scattering signals. When a molecule is next to certain metallic substrate, one may observe an enhancement of the Raman scattering intensity. This observation has brought forth what is known as surface-enhanced Raman spectroscopy (or SERS), which has a significantly extended the reach of Raman spectroscopy as an analytical tool. SERS is now a popular as a high-sensitivity analytic tool. Coupled with instrumental improvements brought about by developments in nanotechnology, its versatility in various applications has significantly increased. A wide variety of applications has been developed around the use of SERS as a quantitative tool, including single molecule and trace detection, detection of organic pollutants, microfluidics, separation science and DNA analysis. SERS technique is favored primarily for its high selectivity feature. It is able to discriminate between materials of the same composition but different structure. In addition, its high sensitivity enables detection of samples even in small volumes. The key step to achieving the giant optical amplification lies on finding a suitable nanoparticle system that supports the effect. Thus, preparation of SERS substrates remains a very active research area. The quality of the signal as well as its reproducibility is dictated by the size, shape and optical properties of the nanostructures. Platforms for SERS measurement can be in the form of colloids of metallic nanoparticles, nanoparticle islands on planar support or periodic arrays of nanoparticles grown on solid support. While suspensions easily generate tiny regions of localized electromagnetic field, referred to as hotspots, very small enhancement is produced and the spectral signal is not reproducible. Despite this drawback, there are a number of reasons for choosing to utilize nanoparticle suspensions as substrates. They are easy and economical to synthesize through wet chemical preparation techniques. Other than mixing the analyte with the colloid, no further sample preparation is needed since most analytes come in solution form. Adsorption of analyte molecules by nanoparticles is very likely since nanoparticle suspensions have very large surface area. The presence of solvent prolongs the shelf-life of the nanoparticles. Reproducibility of the Raman spectra is addressed by using metallic nanoparticles grown on a planar support. Thin films or glass slides serve as support for immobilized nanoparticles. The most sophisticated type of SERS substrates is the fabrication of periodic arrays of nanoparticles directly on solid substrates in a top down fashion, which includes those prepared by nanolithography and template synthesis of nanostructures. Each of these classes of substrates has proved to be suitable for specific uses; there is no best SERS substrate available for universal use in applications. Given the versatility and Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 188 flexibility of the surface-enhanced Raman spectroscopy, it continues to be a very active research subject in many scientific fields. Its flexibility comes from its dependence on several factors that are readily controllable in the laboratory (some of which I have already identified, such as nanoparticle size and shape). The goal is then that of tuning the SERS method to suit the particular analyte of interest. Objectives for the three years A key component of my PhD research will focus on contributing to the ever-growing body of knowledge about the SERS technique and to further broaden its applicability to the characterization of novel biomaterials. Another key component of my PhD research will be to further explore and develop the capabilities of Raman spectroscopy for the characterization of zirconia, which has long been used as a biomaterial in the field of dentistry. Obbiettivi da raggiungere per il primo anno The first year is dedicated for learning of handling of the measurement systems, introduction into the theory of Raman spectroscopy, particularly SERS and fluorescence, measurements on different samples, which include zirconia other biomaterials. Educational activity foreseen Attendance to regular seminars/colloquia and group meetings. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 189 LEONARDO VENTURELLI Email: [email protected] Laboratory: TASC Laboratory at IOM-CNR. Title of the thesis: Microfluidics devices for biomedical applications Supervisor: Professor Giacinto Scoles Tutors (if any):Danut-Adrian Cojoc Research Activity foreseen State of the art and motivations The scope of my 3 years doctorate research project is to produce a biomedical device able to isolate and study Circulating Tumor Cells (CTCs) from a blood sample. The problem is to find a method that can anytime and anywhere identify and isolate circulating cancer cells from a population with a great abundance of non pathological circulating cells. Indeed right now only one diagnostic tool was been approved by the NIH committee in the USA. The same is for European and eastern countries. This method named Veridex CellSearch™ (Johnson & Johnson) is extremely expensive and less than 10 robot are currently used all over the Europe. This lack of technology leave a lot of possibilities to develop newer and cheaper CTCs diagnostic devices. In January at the beginning of my studies I have done some computer simulation in order to decide what kind of geometry could be the best for my research field. We (me and my tutor) have decided to realize a microfluidic channels (like 200 um thickness and 100 um height) cutting a polydimethylsiloxane (PDMS) membrane by a laser cutter. In order to study flux and geometry relevance we have used a set of glass microbeads (ø: 4-30µm) trapped by laser. In the next months we would modify channels fluidic resistance in one arm of the device and thus register pressure and velocity deltas in the other arms (channels). Right now we are waiting for some ordered materials for microfluidics specific approach. For example we need to use little needles for little channels and zero dead volume valves to allow a flawless handling of micro composites. The goal of my research would be produce a simple, useful and cheap device for medical diagnostic application and in particular this should be a tool to investigate circulating tumor cells number in patients’ blood. Objectives for the following year (if applicable) In the next future we have to develop the device by LIGA methods in a PDMS membrane for a thorough nano-structured device. Then we will have to deposit a gold film on some arms of the device (or evaporate, it depends by the following studies) and then functionalize it by thiol bonding. In this way we will have a reactive layer that will be used for the next functionalization process, useful for cells capture and studies. In the second year of doctorate I hope to begin the detect and evaluation of the biological characteristics of CTCs using this device, like viscosity of tumor cells and consequently their fluid-dynamic properties in order to elucidate the metastatic propensity of these cells to detach and migrate to characteristics body sites. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 190 Objectives for the three years So the three years doctorate program is: - Develop a single functionalized device able to detect and isolate few cells (about 5-10) from an original blood sample of around 109 cells. - Study and evaluate viscous-dynamics properties of these cells (this goal could be better reached by an Erasmus placement at Professor Cristofanilli Research Laboratory at Fox Chase Cancer Center in Philadelphia, PA, USA) - If it will work with poor channels we will need to implement it by adding like 100 parallel connected channels and begin to think about an hypothetical commercialization of it. Obbiettivi da raggiungere per il primo anno -Define the device geometry. -Make a reproducible device with LIGA method in PDMS membrane. -Study the flux by varying the fluidic resistance of the channels. -Doing the first analysis of the channels functionalization by charged-modified (or magnetic, or Antibodies bonded) microbeads. Research project First Year Porject Description: In the first months of my project I have identified the kind of device and the geometry to develop and we decided to begin with microfluidic approach. After that I have begun with some computer simulations (MathLab and MultiPhysics programs) to understand what kind of problem we will can encounter and how I could avoid them. A geometry for the prototype is been chosen and other one was been investigated as replacement for the first. Finally flow characteristics and materials properties was been analyzed to identify a good compromise between materials fluidic resistance and their capability to accept a functionalization like gold films. Last month’s and next month’s activities take place at IOM-CNR, Sincrotrone Elettra, (ex TASC laboratory, Trieste) where I have used a laser cutter (IR laser, λ=10600 nm) to begin to approach with a microfluidics device with bigger dimensions than what they will be in final prototype. The first studies with this self-made device include the use of µbeads (functionalized, magnetic, .. ,ecc) for living cells mimicking and comprehension on what parts of the device need to be improved. After the comprehension of the needed parameters we will proceed with soft lithography technique that will allow us to obtain an etching of the prototype CAD design in a PDMS (height controlled) membrane. At the same time I am attending few university courses for example a LabView programming course in order to learn how to communicate with laboratory’s instrumentations and a course on microfluidics devices. Moreover I have studied, clearly, microfluidics and CTCs scientific papers downloading them by the web or finding at the university library. Second Year project description: Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 191 Second year project provide using prototyped device to study living cells. The device will need a functionalization to allow the recognition between CTCs and channels. Then we will test device’s watertight with blood samples and how it counteract with all blood’s components. An Erasmus placement will be hopefully profitable and necessary for a more depth knowledge of the biological CTCs’ characteristics in the second half of the second year project. Third Year Project Description: At the beginning of third year prototyped device should be tested, completed and ready to use for biomedical research laboratories tries. The next step should be implement channels’ numbers not by using soft lithography technique or other similar methods but produced by in parallel linkage of PEEK microtubes with functionalizable inner layer (ID: 50µm). Thus could be maybe done by fusing microtubes in PMMA slide where an inlet tank parcel out sample in all channels. At the end of the channels an optical fiber analyzes the samples for the recognition of positive cells. A second control will be held by an interferometer in order to analyze pressure’s gap. Doctorate thesis will be write in the second period of third year and consigned at the beginning of fourth year for the final exam dissertation. Fig. Gantt Diagram of my project. Educational activity foreseen I have attended in February and March a Labview programming course for beginners and in September I think I will continue with the advanced course. I think it will be also necessary to find a course in evaporation and deposition chemical processes for plastics materials in order to functionalize device’s channels. At the same time I look every week on ICTP website to find out interesting courses and seminars. At last but not the least I am studying by myself some mathematical and physical books at home to improve my actual knowledge and my future job perspectives. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 192 LIANQIN WANG Title of the Thesis: Nanostructured Materials for Energy: Li-ion battery and Hydrogen production from biomass by Electrolysis Supervisor: Prof. Paolo Fornasiero Tutors: Francesco Vizza, Alessandro Lavacchi State of art and motivations Anatase TiO2 is one of the candidates as high voltage anode material for Li-ion batteries. It offers the advantage of having a low volume change upon Li+ insertion and improved rate capability as compared to graphite. However,the practical capacity and high-rate capability are seriously limited by the poor ion and electron conductivity of micro-sized bulk anatase TiO2. To improve the electrochemical performance, one of the most common strategies reported is producing nanostructured electrode materials, such mesoporous materials and nanocrystals. By reducing the particle dimensions to nanoscale, it can serve to shorten distances of electron and lithium-ion transport, and increase contact area between electrode and electrolyte, leading to the electrochemical performance improvement. In this project we plan to study anodic materials other than carbonaceous materials. Anatase TiO2 (or anatase TiO2 nanotubes) is the candidate material. Fig. 1. (a) FE-SEM images of the as-prepared TiO2 nanowires; (b)SEM images of anatase TiO2 nanotube arrays. Moreover, it has been known that silicon exhibits a theoretical capacity of 4200 mAh/g, much higher than those of other anode materials. The research will be devoted to study the activity during charge-discharge cycles of new materials such as carbon coated with SiOx or carbon mixed with TiO2 (or TiO2 nanotubes). Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 193 Fig. 2. SEM (a) and TEM (b) images of the TiO2 hollow spheres. The research work will be divided into the following steps: i) Survey of the literatures; ii) Synthesis of new materials; iii) Material characterization (XRD, TEM, SEM and ICP-OS analysis); iv) Electrochemical measurements. The project is also proposed to aim at designing, developing and testing a series of "unconventional" nanostructured metal catalysts to be used for the hydrogen production from biomass. The project draws its motivations from the expertise of the ICCOM-CNR researchers in the synthesis of nano-structured metal catalysts featured by high thermal and chemical stability as well as excellent activity. Some of these catalysts have been successfully employed in reforming and steam reforming reactions of alcohols and in electrochemical process such those that occur in direct alcohol fuel cells (methanol, ethanol, ethylene glycol, glycerol) or in electrolyzer for hydrogen production. It has been demonstrated that the electrolysis of aqueous solutions of compounds whose oxidated potential in alkaline environment is much lower than that of pure water. For example, ammonia and ethanol allows for the production of hydrogen at reversible potentials, of 0.06 and 0.10 V respectively, much more favourable compared to that of water (1.23 V). Therefore, it decreases the production cost of electrolytic hydrogen from 5-6 Euro/Kg to 1.6-1.9 Euro/Kg in line with the UE and DOE expectations. The study will be divided into three stages: (i) preparation of catalysts and electrodes (ii) chemicalphysical characterization (SEM, TEM, AFM, FTIR, EXAFS, ICP-AES, cyclic voltammetry, galvanostatic and galvadynamic experiments) (iii) screening of the anode electrocatalysts for the production of hydrogen from methanol, ethanol, ethylene glycol, glycerol in electrolyzers equipped with anion-exchange membranes or without membrane. Objectives for the three years Development, fundamental and functional characterization of a variety of new materials:i) Li-ion battery; ii) hydrogen production by electrolysis Objective for the first year Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 194 Literature analysis for the definition of the state of the art as a basic reference for benchmarking; definition of the protocols for both the fundamental and functional characterization of the materials that will be synthesized; selection trough experimental trials of the best synthetic routes for the nanostructures. Research project Activity 1.1: State of the Art The state of the art for Li-ion battery and hydrogen production by electrolysis will be critically reviewed. The obtained data will be used to select systems and synthetic strategies. Task 1.1: Literature Analysis A perusal of the existing literature will be performed. The main purposes are a clear definition of the state of the art and the extraction of the most relevant functional data on the existing systems for the benchmarking. Task 1.2: Selection of the Systems The selection of the systems to be investigated will be performed according to the data provided by the literature examination. Both the materials and the specific reaction will be selected on the basis the potential scientific and technological impact. Activity 2: Nanostructure synthesis i) Synthesis of the anode material for Li-ion batteries based on mixed carbonaceous materials and metal oxides such as anatase TiO2 or TiO2 nanotubes. Titanium dioxide will be synthesized by both electrochemical and chemical methods for the production of both nanotube arrays and nanostructured carbon supported powders. ii) Development of catodic and anodic electrocatalysts for EPM (Electrolyzers with Polymeric Membrane) of AE (Alkalyne Electrolizers) type electrolyzers to be employed in hydrogen production from renewable like ethanol, ethylene glycol or glycerol. Task 2.1: Electrochemical Methods i) Materials for Li-ion batteries: Anodization of titanium metal substrates will be employed for the synthesis of anatase TiO2 or TiO2 nanotube arrays with variable nanotube diameter and length. The anodization will be followed by heat treatment in order to favour the formation of the active phases; ii) Cathode and anode for hydrogen production from biomass by electrolysis: The synthesis will be performed using controlled electrodeposition of metals such as palladium or platinum on suitable materials such as tissues or networks of nickel and titanium. Task 2.2: Chemical Methods i) The chemical synthesis of titanium dioxide nanostructured powders both unsupported and carbon supported will be performed to obtain new materials for Li-ion batteries. The possibility of doping the Titania with Si or other metals will also be explored; ii) Synthesis of nanostructured catalysts containing noble metals (Pd, Pt) evaluation of the catalytic activity in electrolytic cells fed by alcohols, containing an anionic exchange membrane without membrane. The focus will be the synthesis of spongy metal phases on conductive carbon, even with mixed binary and ternary metal oxides. On these materials will be dispersed metal particles by spontaneous deposition and particular attention will be given to the composition and morphology of the synthesized catalysts. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 195 The ultimate goal is to obtain metal-oxide catalysts in very small particles containing NP, stabilized by interaction with metal oxides and the chemical - physical characterization of their properties, modulated as a function of process parameters. on suitable materials such as tissues or networks of nickel and titanium. Activity 3: Characterization The characterization will consist in the investigation of the catalysts basic properties (structure, morphology, composition, basic electrochemistry) and functional performances. This activity will conclude the project with a benchmarking of the produced materials with the state of the art and a summary of the main findings of the three years of work. The fundamental characterization will consist in the definition of the basic properties of the materials. The composition, the structure and the morphology will be investigated as well as the composition. Educational Activity The educational activity of the first year will mainly consists in the examination of the existing literature. The activity will be also integrated by the seminars which will be organized by the Istituto per la Chimica dei Composti OrganoMetallici (ICCOM). Gantt Chart M 1-3 M 4-6 M 7-9 M 12 10- M 13- M 16- M 15 18 M M 25- M M 31- M 19- 22- 27 33 21 24 2830 3436 Activity 1 State of the Art Task 1.1 Literature analysis Task 1.2 Selection of the Systems Activity 2 Nanostructure Synthesis Task 2.1 Electrochemical Methods Task 2.2 Chemical Methods Activity3 Characterization Task 3.1 Basic Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 196 Characterization Task 3.2 Functional Characterization Task 3.3 Benchmarking and Conclusion Figure 3: Gantt Chart Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 197 VALENTINA ZANNIER Email: [email protected] [email protected] Laboratory: Istituto Officina dei Materiali IOM – CNR Laboratorio TASC Area Science Park – Basovizza (TS) Title of the thesis: Synthesis and characterization of semiconductor nanowires Supervisor: Dr. Silvia Rubini Tutors (if any): / Research Activity foreseen State of the art and motivations Semiconductor nanowires (NWs) are quasi one-dimensional crystals with cylindrical or polyhedral shape; they have a typical section diameter of some nanometers and length of few microns. They represent one of the key research areas in nanotechnology due to their novel properties with respect to the corresponding bulk materials, arising from their mono-dimensionalty, e.g. photon, phonon and electron confinement, dislocation-free crystal growth on mismatched substrates, size-dependent reduction in thermal conductivity and good mechanical response1. All these properties provide significant opportunities for applications in electronics, photonics, biology and medicine. The most recent literature, in fact, reports the use of semiconductor nanowires as building blocks for field effect transistors, lasers, photodetectors, solar cells, optical fibers, high resolution microdisplays, light emitting diodes and chemical sensors 1,2,3,4,5. Furthermore, the growth of hybrid nanostructures, e.g. semiconductor nanowires grown directly on graphene layers or on organic semiconductor substrates, has attracted much attention in the recent years because of the interesting potentials that could result from the combination of the semiconductor electronic and optoelectronic properties with the mechanical flexibility and the optical trasparence of these materials 3,6,7,8. All these features of semiconductor nanowires make them among the top applicants in scientific research in nanotechnology. In this context, the study of the growth mechanism and the optimization of the growth process, as well as the investigation and optimization of their structural, chemical, electrical and optical properties, represent the first step for the realization of novel nanodevices. References [1] P. Yang, R. Yan, M. Fardy, Semiconductor nanowire: what’s next?, Nanoletters (2010), 10, 1529 – 1536 [2] Y. Li, F. Qian, J. Xiang, C. M. Lieber, Nanowire electronic and optoelectronic devices, Materials Today (2006) 9, 18 – 27 [3] W. U. Huynh, J. J. Dittmer, A. P. Alivisatos, Hybrid Nanorod-Polymer Solar Cells, Science (2002) 295, 2425 – 2427 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 198 [4] Y. L. Cao, Z.T.Liu, L. M. Chen, Y. B. Tang, L. B. Luo, J. S.Jie, W.J. Zhang, S. T. Lee, C. S. Lee, Singlecrystalline ZnTe nanowires for application as high - performance Green/Ultraviolet photodetector, Optics Express (2011) 19, 7 [5] E. Gil-Santos, D. Ramos, J. Martinez, M. Fernandez-Regulez, R. Garcia, A. San Paulo, M. Calleja, J. Tamayo, Nanomechanical mass sensing and stiffness spectrometry based on two-dimensional vibrations of resonant nanowires, Nature Nanotechnology (2010) 5, 641 – 645 [6] W. I. Park, C. H. Lee, J. M. Lee, N. J. Kim, G. C. Yi, Inorganic nanostructures grown on graphene layers, Nanoscale (2011), 3, 3522 – 3533 [7] L. Liao, Y.C. Lin, M. Bao, R. Cheng, J. Bai, Y. Liu, Y. Qu, K. L. Wang, Y. Huang, X. Duan, High-speed graphene transistors with a self-aligned nanowire gate, Nature (2010), 467, 305 – 308 [8] B. Kumar, K. Y. Lee, H. K. Park, S. J. Chae, Y. H. Lee, S. W. Kim, Controlled growth of semiconducting nanowire, nanowall, and hybrid nanostructures on grapheme for piezoelectric nanogenerators, AcsNano (2011), 5, 5, 4197 – 4204 Objectives for the three years The potentials of semiconductor nanowires are related to their crystal quality, composition, shape and morphology; the control of these parameters, through a precise growth method and a deep comprehension of the growth process, is essential for the optimization of their synthesis. A detailed characterization of the nanostructures grown is also fundamental for understanding their properties and the possibility to use and integrate them in technological devices. The purposes of my research project within the PhD in Nanotechnology can be summarized as follows: -Growth of II – VI semiconductor nanowires through the bottom-up approach, by means of Molecular Beam Epitaxy (MBE), using different substrates and different metals as catalysts. -Optimization of the growth process by testing different growth parameters. -Detailed study of the growth mechanism of such nanowires, with particular interest on the interaction between substrate and catalyst and the role it plays on the subsequent nanowire growth. -Morphological, structural, optical and electrical characterization of the nanostructures grown, by means of spectroscopic and microscopic techniques, in order to understand the potential applications of such nanostructures in novel devices. -Integration of nanowires grown with graphene layers, organic layers, carbon nanotubes, and characterization of the systems obtained. Obbiettivi da raggiungere per il primo anno For the first year I’m going to reach the following objectives: -A good knowledge of spectroscopic and microscopic techniques useful for the study of nanowires growth process and properties, such as X-Ray photoemission spectroscopy (XPS), reflection of high energy electron diffraction (RHEED) scanning and transmission electron microscopy (SEM and TEM), X-Ray diffraction, transport measurements, photoluminescence and other optical techniques. -Growth of ZnSe nanowires with metal nanoparticles as catalyst: investigation of the growth mechanism under various growth conditions on different substrates. -Growth of ZnSe and CdSe nanowires using monodispersed Au nanoparticles from colloidal solution. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 199 -Optimization of the nanowires morphology, structural and optical properties. Research project The research project will be carried out mainly at the Molecular Beam Epitaxy Laboratory of the Institute IOM – CNR located in Basovizza (TS). The scientific work I’m going to do there can be divided into 3 main activities that will be carry out in a complementary way: 1)Growth of II – VI semiconductor nanowires by means of MBE. 2)In situ study of growth mechanism and characterization of nanostructures during the growth. 3)Ex situ characterization of the obtained nanowires. The first point will include: -ZnSe nanowires growth on different substrates, with gold and manganese as catalyst. The growth with nanoparticles generated through the annealing of a metal layer deposited on the substrates, as well as using monodispersed colloidal nanoparticle solutions will be studied. -CdSe nanowires growth on different substrates with different metal nanoparticles as catalyst. -II – VI semiconductor heterostructures growth, e.g core-shell CdSe/ZnSe nanowires, CdSe quantum dots into ZnSe nanowires. -Growth of ZnSe, CdSe and heterostructures on non-conventional substrates such as graphene layers and/or conducting polymers. The in situ characterization by means of RHEED and XPS, and the Scanning Electron Microscopy analysis will be routinely carried out during the growth, in order to investigate the growth mechanism under various growth conditions and optimize the growth process. Further characterization of the nanostructures, by means of optical measurements (photoluminescence) and electric transport measurements will be carried out to discriminate the optimal growth protocol as soon as the major growth parameters have been selected. Below is reported a project Gantt chart. Duration 2012 Activities 2013 2014 Gen May Sept – – – Gen – May Sept – – Gen – May Sept – – Apr Apr Aug Apr Aug Aug Dec Dec Dec Growth of II – VI semiconductor NWs Growth of ZnSe nanowires Using Au film Using Au nanoparticles monodispersed Using Mn as catalyst Growth of CdSe nanowires Using Au film Using Au monodispersed Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 200 nanoparticles Using other metals as catalyst Growth of heterostructures Core shell CdSe/ZnSe nanowires CdSe quantum dots into ZnSe NWs II–VI NWs grown on organic layers In situ characterization RHEED XPS Ex situ characterization SEM Photoluminescence Transport Other techniques Educational activity foreseen During the first year of the PhD, my research work in the Lab will be supported by some educational activities: I’m going to study the basic principles of all techniques and methods I’ll use during my research activity from books and literature articles; furthermore I’m going to attend some courses organized by the International Centre of Theoretical Physics (ICTP), for instance the School on Sinchrotron Radiation, Free Electron Lasers and their multidisciplinary applications, in order to learn other modern techniques that could be useful for future studies of the nanostructures and nanodevices I’ll make. I’m also going to participate as a speaker at the 6th Nanowires Growth Workshop, which will take place on 4-6 June 2012 in St. Petersburg, Russia. There I will present the results obtained during the activity carried out for my Master Degree thesis and during the firsts months of the PhD, concerning the substrate – catalyst interaction in the epitaxial growth of ZnSe nanowires on GaAs(111)B. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 201 4.Pubblicazioni dei dottorandi. Venogono di seguito riportate le pubblicazioni dei dottorandi desunte dalla schede riportate al punto precedente: PUBBLICAZIONI SU RIVISTE SCIENTIFICHE ACCETTATE PER LA PUBBLICAZIONE) (PUBBLICATE O 1.M. Cargnello, A. Gasparotto, V. Gombac, T. Montini, D. Barreca and P. Fornasiero, "Photocatalytic H2 and added-value byproducts: the role of metal oxide systems in their synthesis from liquid oxygenates.", European Journal of Inorganic Chemistry 2011 (2011), 4309-4323, selected as cover article. 2.M. Cargnello, N. L. Wieder, P. Canton, T. Montini, G. Giambastiani, A. Benedetti, R. J. Gorte and P. Fornasiero, "A Versatile Approach to the Synthesis of Functionalized Thiol-protected Palladium Nanoparticles.", Chemistry of Materials 23 (2011), 3961-3969. 3.J.-S. Kim, N. L. Wieder, A. J. Abraham, M. Cargnello, P. Fornasiero, R. J. Gorte and J. M. Vohs, "Highly Active and Thermally Stable Core-Shell Catalysts for Solid Oxide Fuel Cells.", Journal of the Electrochemical Society 158 (2011), B596-B600. 4.N. L. Wieder, M. Cargnello, K. Bakhmutsky, T. Montini, P. Fornasiero and R. J. Gorte, "A study of the water-gas-shift reaction over Pd@CeO2/Al2O3 core-shell catalysts.", The Journal of Physical Chemistry C 115 (2011), 915-919. 5.L. Pavan, L. Cozzarini, and V. Lughi, "Interdiffusion-controlled Optical Properties in Nanocrystalline Heterostructures and Nanostructured Materials", MRS Spring Meeting 2011, San Francisco, CA, USA, 28.04.2011 6.L. Cozzarini, F. Antoniolli and V. Lughi, "Optical properties of a novel nanostructured CdS/CdTe material", SPIE Smart Structures/NDE, Conference 7890, San Diego, CA, USA, 06.03.2011 7.D’Este E, Baj G, Beuzer P, Ferrari E, Pinato G, Tongiorgi E and Cojoc D, (2011) Integrative Biology “Use of the optical tweezers technology for long-term, focal stimulation of specific subcellular neuronal compartments”. May 3;3(5):568-77. 8.Pinato G, Lien LT, D’Este E, Torre V and Cojoc D, (2011) Journal of European Optical Society “Neuronal chemotaxis by optically manipulated liposomes”. Vol 6, 11042. 9.Pinato G, Raffaelli T, D’Este E, Tavano F and Cojoc D, (2011) Journal of Biomedical Optics “Optical delivery of liposome encapsulated chemical stimuli to neuronal cells”. Sep;16(9):095001. 10.D’Este, Pharmacogenetic of escitalopram and mental adaptation to cancer in palliative care: report of 18 cases. Tumori 97(3):358-61 (2011). 11.R. Fior, S. Maggiolino, M. Lazzarino and O. Sbaizero, “A new transparent BioMEMS for uni-axial single cell stretching”, Microsystem Technologies 2011 doi:10.1007/s00542-0111325-8 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 202 12.V. Lanzilotto, C. Sanchez-Sanchez, G. Bavdek, D. Cvetko, M. F. Lopez, J. A. Martin-Gago and L. Floreano “Planar growth of Pentacene on the dielectric TiO2 surface” J. Phys. Chem. C, 2011, 115 (11), pp 4664–4672 13.C. Sanchez-Sanchez, V. Lanzilotto, C. Gonzalez, A. Verdini, P. de Andrés, L. Floreano, Maria F. López and J. A. Martín-Gago "Floating molecular layer of spinning C60 molecules on TiO2(110) surfaces” in preparation 14.C. Sanchez-Sanchez, V. Lanzilotto, G. Bidau, B. Gomez-Lor, R. Perez, L. Florenao, M. F. Lopez, J. A. Martin-Gago “On-surface Dehydrogenation reactions of polycyclic aromatic hydrocarbons on Ti02(110)” submitted 15.Immacolata Luisi, Silvia Pavan, Giampaolo Fontanive, Alessandro Tossi, Fabio Benedetti, Roberto Marzari, Adriano Savoini, Elisa Maurizio, Riccardo Sgarra, Daniele Sblattero, Federico Berti (submitted) An albumin-derived peptide for binding and catalysis, 2012 16.Monica Marini, Luca Piantanida, Alpan Bek, Rita Musetti, Mingdong Dong, Flemming Besenbacher, Marco Lazzarino, Giuseppe Firrao (2011) A revertible, autonomous, selfassembled DNA-origami nanoactuator. Nano Letters 17.Migliorini E., Grenci G., Ban J., Pozzato A., Tormen M., Lazzarino M., Torre V., Ruaro ME. Acceleration of neuronal precursors differentiation induced by substrate nanotopography. Biotech and Bioeng 2011 Nov; 108,11:2736-2746 18.Migliorini E., Ban J., Di Foggia V., Ruaro ME., Torre V., Lazzarino M. Nanoscale live imaging. Imaging & Microscopy. 2011 May; 25-28 19.Lasalvia M, Perna G, Mezzenga E, Migliorini E , Lazzarino M, L’Abbate N and Capozzi V. Atomic force microscopy investigation of morphological changes in living keratinocytes treated with HgCl2 at not cytotoxic doses. J. of Microscopy. 2011 20.H. Pakdast and M. Lazzarino Triple Coupled Cantilever Systems for Mass Detection and Localization. Sensors & Actuators: A. Physical, accepted for publication. 21.Tavano F., Bonin S., Pinato G., Stanta G. and Cojoc D., Custom-built optical tweezers for locally probing the viscoelastic properties of cancer cells. International Journal of Optomechatronics September 2011 22.Pinato G., Raffaelli T., D’Este E., Tavano F. , Cojoc D., Optical Delivery of liposome encapsulated chemical stimuli to neuronal cells, International Journal of Biomechanical Optics 16 (9) September 2011 23.Bonin S., Tavano F. Restoration and Reconstruction of DNA Length , Guidelines for Molecular Analysis in Archive Tissues Springer-Verlag 2011 Giorgio Stanta Editor 24.“Energy Efficiency Enhancement of Ethanol Electrooxidation on Pd-(CeO2)/C in Passive and •Valentina Bambagioni, Claudio Bianchini, Yanxin Chen, Jonathan Filippi, Paolo Fornasiero, Massimo Innocenti, Alessandro Lavacchi, Andrea Marchionni, Werner Oberhauser, Francesco Vizza, Active Polymer Electrolyte-Membrane Fuel Cells”, submitted to Chemsuschem, November, 2011 25.Y.X. Chen, M. Bevilacqua, C. Bianchini, S.G. Sun, S.P. Chen, J. Filippi, P. Fornasiero, M. Innocenti, A. Lavacchi, F. Vizza, F. di Benedetto, A. Marchionni, W. Oberhauser, H. Miller, Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 203 “RedOx Milling and Faceting (ROMiF) - A Post-Treatment for the Size Control and the High Index Facets Generation of Palladium Nanoparticles.”, (submitted) 26.F. Romanato, M. Massari, T. Ongarello, M. Carli, G. Pirruccio, D. Sammito, V. Giorgis, D. Garoli, R. Bozio, R. Pilot, R. Signorini, P. Schiavuta, F. Marinello, “Design, Fabrication and characterization of Plasmonic Gratings for SERS”, Microelectronic Engineering 88 (8), pp. 2717-2720 27.D. Garoli, M. Natali, G. Parisi, T. Ongarello, E. Sovernigo, M. Massari, V. Giorgis, G. Ruffato, S. De Zuani, F. Romanato “Fabrication of metamaterials in the optical spectral range”, Microelectronic Engineering 88 (8), pp. 1951-1954 28.Garoli D., Romanato F., Zilio P., Natali M., Marinello F., Ongarello T., Sammito D., De Salvador D., “Fabrication of "nano-rocket-tips" for plasmonic nanofocusing” (2011) Microelectronic Engineering, 88 (8), pp. 2530-2532. 29.Romanato F., Pilot R., Massari M., Ongarello T., Pirruccio G., Zilio P., Ruffato G., Carli M., Sammito D., Giorgis V., Garoli D., Signorini R., Schiavuta P., Bozio R., “Design, fabrication and characterization of plasmonic gratings for SERS” (2011) Microelectronic Engineering, 88 (8), pp. 2717-2720. 30.Zacco G., Romanato F., Sonato A., Sammito D., Ruffato G., Morpurgo M., Silvestri D., Carli M., Schiavuta P., Brusatin G., “Sinusoidal plasmonic crystals for bio-detection sensors” (2011) Microelectronic Engineering, 88 (8), pp. 1898-1901. 31.Liu X, Laurini E, Dal Col V, Posocco P, Ziarelli F, Fermeglia M, Zhang CC, Pricl S, Peng L, “2-Difluoromethylene-4-methylenepentanoic acid, a paradoxical probe able to mimic the signaling role of 2-oxoglutaric acid in Cyanobacteria” Organic Letters, Jun 3; 13(11):2924-7 32.Laurini E, Dal Col V, Mamolo MG, Zampieri D, Posocco P, Fermeglia M, Vio L, Pricl S, “Homology model and docking-based virtual screening for ligands of the σ1 receptor” ACS Med Chem Lett 2011, 2: 834-839 33.Dal Col V et al. “Activate and respond. A molecular rationale for c-kit activation and drug response by juxtamembrane mutations in GISTs” Mol Cancer Ther 2011 submitted 34.Dal Col V et al.,“Activity vs. toxicity of acridine compounds as anti-BVDV agents: a molecular modeling study” Antiviral Res 2011 submitted 35.Frassetto A, Navarra CO, Marchesi G, Turco G, Di Lenarda R, Breschi L, Ferracane JL, Cadenaro M. Contraction stress and degree of conversion of self-adhesive resin cements. Dental Materials, submitted. 36.E. Miniussi, M. Pozzo, A. Baraldi, E. Vesselli, R. R. Zhan, G. Comelli, T. O. Menteş¸ M. A. Niño, A. Locatelli, S. Lizzit, and D. Alfè, “Thermal Stability of Corrugated Epitaxial Graphene Grown on Re(0001)”, Phys. Rev. Lett. 106, 216101 (2011). 37.E. Miniussi, M. Pozzo, A. Baraldi, E. Vesselli, R. R. Zhan, G. Comelli, T. O. Menteş¸ M. A. Niño, A. Locatelli, S. Lizzit, and D. Alfè, “A link between corrugation and thermal stability of epitaxial graphene”, Elettra Highlights 2010-2011, pagg. 66-67. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 204 38.R. Toth, F. Santese, S. P. Pereira, D. R. Nieto, S. Pricl, M. Fermeglia and P. Posocco, “Size and shape matter! A multiscale molecular simulation approach to polymer nanocomposites”, Journal of Material Chemistry, 2011 sottomesso 39.F. Santese, D. R. Nieto, P. Posocco, R. Toth, S. Pricl, M. Fermeglia, “Contact angles of water and oil on polymer surfaces by MD simulations”, Chemical Communications, 2011, sottomesso 40.F. Santese, D. R. Nieto, P. Posocco, R. Toth, S. Pricl, M. Fermeglia, “Water, oil, and surfactant solution on polymer surfaces: converging simulation methods for contact angle determination”, Journal of Physical Chemistry C, 2011 sottomesso 41.L. Tavagnacco, P. E. Mason, U. Schnupf, F. Pitici, L. Zhong, M. E. Himmel, M. Crowley, A. Cesàro, J. W. Brady, “Sugar-binding sites on the surface of the carbohydrate-binding module of CBH I from Trichoderma reesei” Carbohydr. Res., 2011, 345(6), 839-846. 42.L. Tavagnacco, U. Schnupf, P. E. Mason, M-L. Saboungi, A. Cesàro, J. W. Brady, “Molecular dynamics simulation studies of caffeine aggregation in aqueous solution”, J. Phys. Chem. B, 2011, 115(37), 10957-10966. 43.J. W. Brady, L. Tavagnacco, L. Ehrlich, M. Chen, U. Schnupf, M. E. Himmel, M-L. Saboungi, A. Ceasàro, “Weakly-hydrated surfaces and the binding interactions of small biological solutes”, Eur. BioPhys. J. DOI 10.1007/s00249-011-0776-2 (in stampa). 44.F Martelli, M Piccin, G Bais , F Jabeen, S Ambrosini, S Rubini and A Franciosi Nanotechnology 18 (2007) 125603 (4pp) 45.S. Ambrosini, M. Fanetti, V. Grillo, A. Franciosi and S. Rubini, Journal of Applied Physics 109, 094306 (2011) 46.S. Ambrosini, M. Fanetti, V. Grillo, A. Franciosi and S. Rubini, AIP ADVANCES 1, 042142 (2011) PUBBLICAZIONI/ABSTRACTS (NAZIONALI O INTERNAZIONALI) IN CONFERENZE/CONGRESSI 1.M. Cargnello, N. Wieder, R. J. Gorte and P. Fornasiero, "Synthesis of dispersible core-shell metal@oxide materials and their application as stable fuel cell catalysts.", invited speaker at the conference "Chemically synthesized nanoparticles and catalysis", Argonne National Lab (Argonne, IL, USA), 28th April 2011. 2.M. Cargnello, R. J. Gorte and P. Fornasiero, "Synthesis of dispersible core-shell metal@oxide materials and their application as stable fuel cell catalysts.", ICTP-SISSA Workshop on New Materials for Renewable Energy, ICTP, Trieste, Italy, 17th-21st October 2011. 3.L. Cozzarini "Semiconductor Nanocrystals application to Optoelectronic Devices", Finmeccanica/Fulbright meeting 2011, Washington DC, USA, 15.03.2011 4.“8th IBRO world congress of Neuroscience” 14-18th July 2011, Florence. D’Este E., Baj G., Pinato G., Tongiorgi E. & Cojoc D., “Focal delivery of BDNF to cultured neurons with optical tweezers”. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 205 5.“EBSA 2011 – 9th European Biophysics Congress”23-27th August 2011, Budapest. D’Este E., Baj G., Pinato G., Tongiorgi E. & Cojoc D., “Focal delivery of BDNF to cultured neurons with optical tweezers”. 6.“8th IBRO world congress of Neuroscience” 14-18th July 2011, Florence. Pinato G., Thuy Lien L., D’Este E., Torre V. & Cojoc D., “Stimulation of neurite retraction and growth by local release of guidance molecules from lipid vesicles”. 7.Pharmacogenetic of warfarin and its applications in the community medicine . III Monothematic Symposium SIF 2011 “Pharmacogenomics and cancer: from bench to bedside”. Grado (GO), Grand Hotel Astoria, October 8, 2011; 8.R. Fior, S. Maggiolino, M. Lazzarino and O. Sbaizero, "A completely transparent MEMS for mechanical properties evaluation of a single living cell", Proc. SPIE 7929, 792906 (2011) San Francisco CA USA; doi:10.1117/12.874445 (proceedings- speaker) 9.R. Fior, S. Maggiolino, B. Codan and O. Sbaizero, “A study on the cellular structure during stress solicitation induced by BioMEMS”, Proc. EMBC 2011 Boston USA (proceedings speaker) 10.R. Fior, S. Maggiolino, B. Codan, R. Lal, O. Sbaizero, “A new BioMEMS for the study of mechanosensitive ion channels”, Nanotechitaly 2011Venice Italy (poster) 11.V. Martinelli, I. Pecorari, S. Maggiolino, R. Fior, B. Codan, L. Mestroni, O. Sbaizero, “Metabolic and proliferative cells activity on different substrates”, Nanotechitaly 2011 Venice Italy (poster) 12.B. Codan, D. Dorigo, V. Martinelli, S. Maggiolino, R. Fior and O. Sbaizero, “Lithograpic patterned substrate with nanotips for cell indentation”, Nanotechitaly 2011 Venice Italy (poster) 13.Pecorari, B. Codan, V. Martinelli, S. Maggiolino, R. Fior and O. Sbaizero, “Mechanical properties of 3T3 fibroblasts due to fixation assessed using atomic force microscopy”, Nanotechitaly 2011 Venice Italy (poster) 14.V. Zammattio, I. Pecorari, B. Codan, V. Martinelli, S. Maggiolino, R. Fior and O. Sbaizero, “AFM cell morphological analysis: Influence of different environmental conditions on fixed and living cells”, Nanotechitaly 2011 Venice Italy (poster) 15.R. Fior, S. Maggiolino, M. Lazzarino and O. Sbaizero, "A completely transparent MEMS for mechanical properties evaluation of a single living cell", Proc. SPIE 7929, 792906 (2011) San Francisco CA USA; doi:10.1117/12.874445 16.R. Fior, S. Maggiolino, B. Codan and O. Sbaizero, “A study on the cellular structure during stress solicitation induced by BioMEMS”, Proc. EMBC 2011 Boston USA 17.“Planar Growth of Pentacene on the Dieletric TiO2(110)-1X1” V. Lanzilotto, C. SànchezSànchez, G. Bavdek, J. A. Martin Gago and L. Floreano, Summer School of Nanotechnology, Università di Trieste 20-23/09/2011; (poster) 18.“DNA-based autonomous devices at the nanoscale” presso la conferenza “ Joint ICTP-KFAS Conference on Nanotechnology for Biological and Biomedical Applications” (10-14 Ottobre Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 206 2011), ICTP (Miramare). Marini M., Piantanide L, Bek A, Lazzarino M, Musetti R, Firrao G. 19.Tavano F, StantaG., CojocC., PinatoG., MiglioriniE., D’Este E., BoninS. 2nd Physics of Cancer Symposium - Leipzig 13-15 October 2011 Poster Presentation: Local membrane mechanical probing of neoplastic and non-neoplastic human cells 20.Tavano F., Bonin S., D'Este E., Pinato G., Stanta G., Cojoc D., 8th European Biophysics Congress (EBSA) - Budapest 23-27 August 2011, Poster Presentation: Cell mobility and metastatic spreading: a study on human neoplastic cells using Optical Tweezers” F.Tavano, S.Bonin, E.D’Este, G.Pinato, G.Stanta, D.Cojoc 21.Pezcoller Foundation Symposium : Engineering In Cancer Research 16th -18th June 2011Trento-Italy Poster presentation: “Cell mobility and metastatic spreading: a study on human neoplastic cells using Optical Tweezers” ” F.Tavano, S.Bonin, E.D’Este, G.Pinato, G.Stanta, D.Cojoc 22.S. Bidoggia; L. Pasquato; “European Winter School on Physical Organic Chemistry”; Presentazione poster dal titolo: “Perfluorinated monolayer-protected Au nanoparticles for membrane permeation”; Bressanone, Italia, 30 gennaio-4 febbraio 2011. 23.S. Bidoggia, P. Posocco, M. Fermeglia, S. Pricl, and L. Pasquato; “Summer School on Nanotechnology”; Presentazione poster dal titolo: “Control of the morphology of mixed monolayers protecting gold nanoparticles using perfluoro ligands”; Trieste, 20-23 settembre 2011. 24.M.Ganau, P.Parisse, S.Corvaglia, L.Ianeselli, D.Scaini, C.Sanavio, L.Casalis, G.Scoles. Proteomic analyses of malignant gliomas. Regional Summer School of Nanotechnology 2011 25.S.Corvaglia, M.Ganau, Fruk L, Sanavio B, Ianeselli L, Cesselli D, Beltrami AP, Scoles G, Scaini D, Casalis L. Combination of novel protein nanoarrays and microwells devices for single cell protein profiling. Gordon Research Conference Proceedings 2011 26.V. Giorgis, F. Romanato, M. Massari, G. Parisi, M. Carli, D. Sammito, E. Sovernigo, “Design, Fabrication and Characterization of Split Ring Resonators using X-Ray Lithography”, MNE 2011 27.G. Bovo, D. Sammito, D. De Salvador, G. Biasiol, M. Gaio, T. Ongarello, V. Giorgis, “Design of a plasmonic structure integrated on a GaAs HEMT photodetector for biosensing applications”, MNE 2011 28.D. Sammito, G. Zacco, P. Zilio, V. Giorgis, A. Martucci, J. Janusonis, “Design and fabrication of plasmonic gratings for bulk Silicon solar cell light harvesting enhancement”, MNE 2011 29.S. De Zuani, M. Natali, D. Garoli, V. Giorgis, M. Massari, G. Parisi, “Ferroelectric metamaterials: towards a refractive index control”, Metamaterials 2011 30.Polylysine coated silver nanoparticles as sensors for bilirubin quantification using Surface Enhanced Raman Spectroscopy (SERS)”, L. Marsich, A. Bonifacio, V. Sergo; Yellow Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 207 Retreat – Trieste, 06 – 07 giugno 2011 (Congresso sulla biliribina organizzato dal Centro Studi Fegato) 31.D. Sammito, P. Zilio, G. Zacco, A. Martucci, M. Dai Prè, J. Janusonis, J. Ulbikas, S. Padovani, F. Rasello, S. Sinesi and F. Romanato, “The ORION project: nanotechnology applied to bulk Silicon solar cells”, NanotechItaly 2011, Venezia 23-25 Novembre 2011 32.G. Zacco, D. Sammito, P. Zilio, G. Melcarne, G. Gigli, M. Mazzeo, F. Romanato, “Light harvesting enhancement in organic solar cells through the integration of plasmonic crystals”, 26th European Photovoltaic Solar Energy Conference and Exhibition, Hamburg 5-9 Settembre 2011 33.G. Bovo, D. Sammito, D. De Salvador, G. Biasiol, M. Gaio, V. Giorgis, P. Zilio, T. Ongarello and F. Romanato, “Design of a plasmonic structure integrated on a GaAs HEMT photodetector for biosensing applications”, 37th International Conference on Micro and Nano Engineering, Berlino 19-23 Settembre 2011 34.V. Giorgis, F. Romanato, M. Massari, G. Parisi, M. Carli, D. Sammito, E. Sovernigo, “Design, Fabrication and Characterization of Split Ring Resonators using X-Ray Lithography”, 37th International Conference on Micro and Nano Engineering, Berlino 19-23 Settembre 2011 35.Dal Col V et al., Comunicazione a VNPCF Trieste 2011 28-30 marzo “The long and winding road of the c-Kit JXM domain”. 36.” Dal Col V et al., Comunicazione a VNPCF Trieste 2011 28-30 marzo “Overview on σ1 receptors: a 3D homology model to solve a part of the enigma 37.Dal Col V et al., comunicazione a CDDD L’Aquila 2011 21-23 novembre “Nanozapped! DNA, siRNA, and their dendritic nanovectors: a combined in silico/in vivo/in vitro approach” 38.Dal Col V et al., Comunicazione a CDDD L’Aquila 2011 23-25 novembre “The SigmaEnigma. A multistep homology modeling of s1 receptors” 39.Dal Col V et al., Comunicazione a Nanotechitaly 23-25 novembre 2011 “Trekking across GISTs: the clinical journey of KIT, PDGFRA, and the in silico prediction of drug resistance in cancer targeted therapy” 40.E. Miniussi, “A link between corrugation and thermal stability of epitaxial graphene”, in occasione dell’assegnazione del premio Fonda-Fasella 2011 workshop “Nanoenergetics: theoretical and experimental approaches” (Trieste, 15-16 Novembre 2011). 41.Gianluca Grenci, Giovanni Birarda, Elisa Mitri, Luca Businaro, Sabrina Pacor, Lisa Vaccari, Massimo Tormen, “Optimization of Microfluidic Systems for IRMS real Time Monitoring of Living Cells”, “Microfluidic devices for real-time infrared imaging of living cells”, “Atti del XXIV Congresso Nazionale della Società Chimica Italiana” per la Divisione Computazionale, 2011 42.G. Birarda, G. Grenci, L. Businaro, E. Mitri, M. Tormen, S. Pacor and L. Vaccari, “C K-edge NEXAFS Spectra of Model Systems for C2H4 on Si(100): a DFT Simulation”, contenuti Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 208 riportati negli “Atti del XXIV Congresso Nazionale della Società Chimica Italiana” per la Divisione Computazionale, 2011 43.M. Fermeglia, P. Posocco, R. Toth, D. R. Nieto, F. Santese and S. Pricl, “The Factory of the Future: Integrating Multiscale Modeling and Experiments to Produce New, Better Nanocomposite Materials” 24 ottobre 2011 Minneapolis AIChE Annual Meeting 2011 44.M.Fermeglia, P. Posocco, R. Toth, D. Romero, F. Santese, S. Pricl, “Chemistry and shape effects in polymer based nanocomposites: a multiscale modeling study.” Eurofillers 2011 comunicazione: 21-22 agosto 2011 Dresden, Germany 45.P. Posocco, F. Santese, D. R. Nieto, E. Laurini, M. Fermeglia, J. W. Handgraaf, H. G.E.M. Fraaije, M. Lisal, S. Pricl, “Nanoparticles at large. A multiscale molecular modeling protocol to predict/explain structure-property relationships in nanocomposite systems” NanotechItaly, 23-25 novembre 2011, Venezia 46.F. Santese, D. R. Nieto P. Posocco, R. Toth, M. Fermeglia, S. Pricl, “Interfacial wettability of polymeric surfaces by oil, water and surfactant/water nanodroplets. A molecular dynamic study” NanotechItaly 2011 23-25 novembre 2011, Venezia 47.L. Tavagnacco, A. Cesàro, J. W. Brady, “Thermodynamics of aqueous caffeine selfassociation: a revisitation”, “10th Mediterranean Conference on Calorimetry and Thermal Analysis - MEDICTA 2011”, 24 - 27 Luglio 2011, Porto, Portogallo. 48.Self catalyzed GaAs nanowires on GaAs (100): growth and characterization, S. Ambrosini, M. Fanetti, V. Grillo and S. Rubini, New Trends in Nanotechnology, Braga (Portugal) 09/10 49.Self catalyzed GaAs nanowires on Si-treated epiready (100) GaAs wafers by MBE, S. Ambrosini, M. Fanetti, V. Grillo, A. Franciosi and S. Rubini, III-V Nanowire workshop, Bad Honnef (Germany), 02/2011 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 209 5.Giudizi dei referee esterni per dottorandi ammessi all’esame finale aprile 2012 Di seguito sono riportati i referee esterni scelti dal collegio per ciascuno dei dottorandi: Dottorando Astolfo Alberto Titolo Supervisore Development of novel ARFELLI experimental methods for Fulvia cell tracking using nanoparticles Bellomo Francesca Biopolymer based scaffold for tissue engineering Birarda Giovanni Development of microfluidic devices for biomedical applications of Synchrotron Radiation FTIR Microspectroscopy Nanoscale interaction for higher efficiency of contrast media Analysis of aging and stability of bonded interface in dentistry Fontanive Luca Marchesi Giulio Reviewers L. Dean Chapman, PhD Professor, Anatomy & Cell Biology, University of Saskatchewan Dr. Juergen Mollenhauer NMI Naturwissenschaftliches und Medizinisches Institut University of Tübingen, PAOLETTI Dr. Niko Moritz Sergio University of Turku, Finland, Orthopaedic Research Unit Dr. Judith Juhasz University of Cambridge, United Kingdom FRANCIOSI Dr. Paul Dumas Alfonso / Lisa synchrotron-soleil.fr Vaccari Dr. Nikolaj Gadegaard [email protected] CESARO Attilio BRESCHI Lorenzo Rampino Antonio Polysaccharide based CESARO nanoparticles for drug Attilio delivery Santarelli Xenja Development of ROSEI Renzo capabilities for ‘in situ’ analysis of nanoparticles at the MCX powder diffraction Beamline Influence of nanostructure MORGANTE on the electronic properties Alberto of heterojunctions in photovoltaic cells Sovernigo Enrico Prof. Assuntina Morresi - Dipartimento di Chimica, Università di Perugia Alessandro Maiocchi - Centro Ricerche Bracco Prof. Steve Armstrong, Department of Operative Dentistry, College of Dentistry, The University of Iowa - Iowa City, Iowa, USA Prof. Marcela Carrilho, GEO/UNIBAN,Health Institute, Bandeirante University of São Paulo, São Paulo, Brazil Carla M. Caramella - Department of Pharmaceutical Chemistry - University of Pavia – Paolo BLASI, Ph.D.Dip. Chimica e Tecnologia del Farmaco - Università di Perugia Prof. Alvise Benedetti Univ. Ca Foscari: Prof. Jennifer Mac Load, NFL Montreal: Prof. Dr. Gvido Bratina Università Ljubliana, SLO Dr.ssa Francesca Brunetti, University of Rome "Tor Vergata" Vedi dettaglio negli allegati. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 210 6.Giudizi della commissione d’esame finale aprile 2012 La commissione composta dai Professori, Università di Trieste (membro interno), hanno sentito i candidati e stilato i seguenti giudizi: Cozzarini Luca Il candidato ha illustrato il suo lavoro di tesi che è consistito nella progettazione e nella realizzazione di materiali nano strutturati basati su quantum dots per moduli fotovoltaici. La commissione ha apprezzato il livello scientifico del lavoro svolto ed ha individuato una grande potenzialità per un approccio applicativo. Il candidato ha dimostrato di possedere una notevole conoscenza della materia in studio, affrontando la discussione con competenza nelle tecniche proprie del lavoro di tesi. Il candidato ha risposto compiutamente ed in modo chiaro alle domande dei Commissari. Approvata la relazione, la Commissione propone che al candidato VENGA conferito il titolo di Dottore di Ricerca. Era Daniel Il candidato ha illustrato il suo lavoro di tesi che ha riguardato lo studio dei meccanismi di farmaco cinetica legati a fenomeni che si estrinsecano alla nanoscala. La commissione ha apprezzato il livello scientifico del lavoro svolto ed ha individuato una grande potenzialità per un approccio applicativo. Il candidato ha dimostrato di possedere una notevole conoscenza della materia in studio, affrontando la discussione con competenza nelle tecniche proprie del lavoro di tesi. Il candidato ha risposto compiutamente ed in modo chiaro alle domande dei Commissari. Approvata la relazione, la Commissione propone che al candidato VENGA conferito il titolo di Dottore di Ricerca. D’Este Elisa La candidata ha illustrato in lingua inglese il suo lavoro di tesi che ha riguardato la manipolazione di sostanze biologiche tramite strumenti spettroscopici avanzati. La commissione ha apprezzato l’eccellente lavoro innovativo e di frontiera affrontato dal candidato. Il candidato ha dimostrato di possedere una ottima conoscenza della materia in studio, presentando con molta competenza e con completezza il suo lavoro di tesi, rispondendo puntualmente e compiutatamente alle domande della Commissione. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 211 Approvata la relazione, la Commissione propone che alla candidata VENGA conferito il titolo di Dottore di Ricerca e, avendo verificato la sussistenza dei requisiti previsti, la certificazione aggiuntiva Doctor Europaeus. Lanzilotto Valeria La candidata ha illustrato il suo lavoro di tesi che ha avuto come argomento principale i fenomeni di auto assemblaggio a livello nanometrico in film organici sottili su superfici metalliche. La commissione ha apprezzato il livello scientifico elevato del lavoro svolto, caratterizzato da innovative metodologie di indagine. La candidata ha dimostrato di possedere una ottima conoscenza della materia in studio, presentando con competenza e con completezza il suo lavoro di tesi, rispondendo puntualmente alle domande della Commissione. Approvata la relazione, la Commissione propone che alla candidata VENGA conferito il titolo di Dottore di Ricerca. Fior Raffaella La candidata ha presentato il suo lavoro di tesi relativo allo studio proprietà elettriche e meccaniche di singole celle. La commissione ha apprezzato il livello scientifico elevato del lavoro svolto, caratterizzato da un approccio originale al problema analizzato. La candidata ha dimostrato di possedere una ottima conoscenza della materia in studio, presentando con competenza e con completezza il suo lavoro di tesi, rispondendo puntualmente alle domande della Commissione. Approvata la relazione, la Commissione propone che alla candidata VENGA conferito il titolo di Dottore di Ricerca. Luisi Immacolata La candidata ha presentato il suo lavoro di tesi che ha avuto come argomento l’identificazione di scaffold formati da proteine per legare molecole di piccole dimensioni. La commissione ha apprezzato il livello scientifico del lavoro svolto ed ha individuato una grande potenzialità per un approccio applicativo. Il candidato ha dimostrato di possedere una notevole conoscenza della materia in studio, affrontando la discussione con competenza nelle tecniche proprie del lavoro di tesi. Il candidato ha risposto compiutamente ed in modo chiaro alle domande dei Commissari. Approvata la relazione, la Commissione propone che alla candidata VENGA conferito il titolo di Dottore di Ricerca. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 212 Pakdast Hossein Il candidato ha presentato il suo lavoro di tesi che ha avuto come argomento principale la progettazione e la realizzazione di risuonatori MEMS per il riconoscimento di singole molecole. La commissione ha apprezzato il livello scientifico del lavoro svolto ed ha individuato una grande potenzialità per un approccio applicativo. Il candidato ha dimostrato di possedere una notevole conoscenza della materia in studio, affrontando la discussione con competenza nelle tecniche proprie del lavoro di tesi. Il candidato ha risposto compiutamente ed in modo chiaro alle domande dei Commissari. Approvata la relazione, la Commissione propone che al candidato VENGA conferito il titolo di Dottore di Ricerca. Sciuto Giacomo Il candidato ha presentato il suo lavoro di tesi che ha avuto come argomento principale l’applicazione delle nano scienze al miglioramento degli scambiatori di calore industriali. La commissione ha apprezzato il livello scientifico elevato del lavoro svolto, caratterizzato da un approccio originale al problema analizzato. La candidata ha dimostrato di possedere una ottima conoscenza della materia in studio, presentando con competenza e con completezza il suo lavoro di tesi, rispondendo puntualmente alle domande della Commissione. Approvata la relazione, la Commissione propone che al candidato VENGA conferito il titolo di Dottore di Ricerca. Marini Monica La candidata ha presentato il suo lavoro di tesi che ha avuto come argomento l’implementazione di logiche semplificate in nano sensori ibridi bio inorganici. La commissione ha apprezzato l’eccellente lavoro innovativo e di frontiera affrontato dal candidato. Il candidato ha dimostrato di possedere una ottima conoscenza della materia in studio, presentando con molta competenza e con completezza il suo lavoro di tesi, rispondendo puntualmente e compiutatamente alle domande della Commissione. Approvata la relazione, la Commissione propone che alla candidata VENGA conferito il titolo di Dottore di Ricerca. Migliorini Elisa La candidata ha presentato il suo lavoro di tesi che ha avuto come argomento la caratterizzazione di substrati nano strutturati per il controllo di cellule staminali embrionali. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 213 La commissione ha apprezzato l’eccellente lavoro innovativo e di frontiera affrontato dal candidato. Il candidato ha dimostrato di possedere una ottima conoscenza della materia in studio, presentando con molta competenza e con completezza il suo lavoro di tesi, rispondendo puntualmente e compiutatamente alle domande della Commissione. Approvata la relazione, la Commissione propone che alla candidata VENGA conferito il titolo di Dottore di Ricerca. Tavano Federica La candidata ha illustrato in lingua inglese il suo lavoro di tesi che ha avuto come argomento l’utilizzo di optical tweezer per lo studio della mobilità di cellule umane per lo studio della propagazione metastica. La commissione ha apprezzato il livello scientifico elevato del lavoro svolto, caratterizzato da una notevole varietà di metodologie di indagine.. La candidata ha dimostrato di possedere una ottima conoscenza della materia in studio, presentando con competenza e con completezza il suo lavoro di tesi, rispondendo puntualmente alle domande della Commissione. Approvata la relazione, la Commissione propone che alla candidata VENGA conferito il titolo di Dottore di Ricerca e, avendo verificato la sussistenza dei requisiti previsti, la certificazione aggiuntiva Doctor Europaeus. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 214 7.Elenco dei componenti del collegio docenti Componente Ente Dipartimento BARALDI University Trieste Department of Physics - DF Alessandro BERTI Federico University Trieste Department of Chemical and Pharmaceutical Sciences - DSCF BIASIOL Giorgio IOM-CNR Advanced Technology and Nanosceinces - TASC INFM BONIN Serena University Trieste Clinical Department of Medical Science, Surgery and Healt DCSMCS BRESCHI University Trieste Clinical Department of Medical Lorenzo Science, Surgery and Healt DCSMCS CADENARO University Trieste Clinical Department of Medical Milena Science, Surgery and Healt DCSMCS CASALIS Elettra Not assigned Loredana Synchrotron Spa CESARO Attilio University Trieste Department of Life Sciences - DLS COJOC Dan Advanced Technology and Nanosceinces - TASC INFM University Trieste Department of Physics - DF SSD FIS/03 Qualifica Ruolo Collegio RU Exclusive Member CHIM/06 RU Member RIC MED/34 RU Member non academic Exclusive Member MED/28 PA Exclusive Member MED/28 PA Exclusive Member RIC CHIM/04 PO IOM-CNR RIC COMELLI Giovanni DA ROS Tatiana University Trieste Department of Chemical and Pharmaceutical Sciences - DSCF DANANI Andrea University School Not assigned Italian Swiss FIS/03 DE VITA Alessandro DI LENARDA Roberto University Trieste Department of Engineering and Architecture - DIA University Trieste Clinical Department of Medical Science, Surgery and Healt DCSMCS University Padova Not assigned INGPA IND/22 MED/28 PO MED/08 PO Member University Trieste Department of Engineering and Architecture - DIA University Udine Department of Biology and Plant Protection - DBPP (UD) University Trieste Department of Chemical and Pharmaceutical Sciences - DSCF Elettra Synchrotron Spa INGIND/24 AGR/12 PO Director PA Member FASSINA Ambrogio FERMEGLIA Maurizio FIRRAO Giuseppe FORNASIERO Paolo FRALEONI Alessandro Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 PO Member non academic Exclusive Member Member non academic Exclusive Member Exclusive Member Member foreing University Exclusive Member Exclusive Member CHIM/08 RU RIC CHIM/03 PA RIC Exclusive Member Member non academic 215 Componente Ente Dipartimento SSD Qualifica Ruolo Collegio FRONZONI University Trieste Department of Chemical and CHIM/02 PA Exclusive Giovanna Pharmaceutical Sciences - DSCF Member GAMINI Amelia University Trieste Department of Life Sciences - DLS CHIM/04 RU Exclusive Member GIRALDI Tullio University Trieste Department of Life Sciences - DLS BIO/14 PO Member non academic KISKINOVA Elettra Not assigned RIC Member non Maya Synchrotron Spa academic LAZZARINO IOM-CNR Advanced Technology and RIC Member non Marco Nanosceinces - TASC INFM academic LUGHI Vanni University Trieste Department of Engineering and INGRIC Exclusive Architecture - DIA IND/22 Member MACOR Paolo University Trieste Department of Life Sciences - DLS MED/04 RIC Exclusive Member MARSI Stefano University Trieste Department of Engineering and INGRU Exclusive Architecture - DIA INF/01 Member MARZARI University Trieste Department of Life Sciences - DLS BIO/06 PO Exclusive Roberto Member MORGANTE University Trieste Department of Physics - DF FIS/01 PA Vice Director Alberto MUSCIA University Trieste Department of Engineering and PA Exclusive Roberto Architecture - DIA Member ONESTI Silvia Elettra Not assigned RIC Member non Synchrotron Spa academic PAOLETTI Sergio University Trieste Department of Life Sciences - DLS BIO/19 PO Member PASQUATO University Trieste Department of Chemical and CHIM/06 PA Exclusive Lucia Pharmaceutical Sciences - DSCF Member PASSAMONTI University Trieste Department of Life Sciences - DLS BIO/10 RIC Exclusive Sabina Member PRATI Ubaldo Fund. Tommaso Not assigned P.Osp Member non Campanella academic PRICL Sabrina University Trieste Department of Engineering and INGPA Exclusive Architecture - DIA IND/24 Member RUBINI Silvia IOM-CNR Advanced Technology and RIC Member non Nanosceinces - TASC INFM academic SBAIZERO Orfeo University Trieste Department of Engineering and INGPO Exclusive Architecture - DIA IND/22 Member SCAINI Denis Elettra RIC Member non Synchrotron Spa academic SCHMID Chiara University Trieste Department of Engineering and INGPA Exclusive Architecture - DIA IND/22 Member SERGO Valter University Trieste Department of Engineering and INGPO Exclusive Architecture - DIA IND/22 Member STANTA Giorgio University Trieste Clinical Department of Medical MED/08 PA Member Science, Surgery and Healt DCSMCS Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 216 Componente Ente TOFFOLI CRO Aviano Giuseppe TORMEN IOM-CNR Massimo UGO Paolo University Venezia Dipartimento Not assigned VACCARI Lisa Not assigned Elettra Synchrotron Spa Advanced Technology and Nanosceinces - TASC INFM Not assigned Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 SSD Qualifica Ruolo Collegio P.Osp Member non academic RIC Member non academic CHIM/01 PA Exclusive Member RIC Member non academic 217 8. Produzione scientifica del collegio docenti 2007-2012 Personale di ruolo nelle università italiane e INAF 1. BARALDI Alessandro BIANCHETTIN L, BARALDI A., VESSELLI E, DE GIRONCOLI S, LIZZIT S, PETACCIA L, COMELLI G., ROSEI R (2007). Experimental and Theoretical Surface Core Level Shift Study of the S-Rh(100) Local Environment. JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES, vol. 111; p. 4003-, ISSN: 1932-7447 BARALDI A., BIANCHETTIN L, VESSELLI E, DE GIRONCOLI S, LIZZIT S, PETACCIA L, ZAMPIERI G, COMELLI G., ROSEI R (2007). Highly under-Coordinated Atoms at Rh Surfaces: Interplay of Strain and Coordination Effects on Core Level Shift. NEW JOURNAL OF PHYSICS, vol. 9; p. 143-, ISSN: 1367-2630 BUATIER DE MONGEOT F, TOMA A, MOLLE A, LIZZIT S, PETACCIA L, BARALDI A. (2007). Self-organised synthesis of Rh nanostructures with tunable chemical reactivity. NANOSCALE RESEARCH LETTERS, vol. 2; p. 251-, ISSN: 1931-7573 BARALDI A., VESSELLI E., BIANCHETTIN L, COMELLI G, LIZZIT S, PETACCIA L, DE GIRCONCOLI S, LOCATELLI A, MENTES O.T, ABALLE L, WEISSENRIEDER J, ANDERSEN J.N (2007). The (1x1)-> hexagonal phase transition on Pt(100) studied by high resolution core level photoemission. THE JOURNAL OF CHEMICAL PHYSICS, vol. 127; p. 164702-, ISSN: 0021-9606, doi: 10.1063/1.2794344 DING X, DE ROGATIS L, VESSELLI E, BARALDI A., COMELLI G, ROSEI R, SAVIO L, VATTUONE L, ROCCA M, FORNASIERO P, ANCILOTTO F, BALDERESCHI A, PERESSI M. (2007). Interaction of carbon dioxide with Ni(110): a combined experimental and theoretical study. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, vol. 76; p. 195425-(1-12), ISSN: 1098-0121, doi: 10.1103/PhysRevB.76.195425 TAIT S.L, WANG Y, LIN N, COSTANTINI G, BARALDI A., ESCH F, LIZZIT S, PETACCIA L, KERN K (2008). MetalOrganic coordination interactions in Fe-Teraphthalic acid networks on Cu(100). JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 130; p. 2108-2113, ISSN: 0002-7863, doi: 10.1021/ja0778186 BARALDI A. (2008). Structure and chemical reactivity of transition metal surfaces as probed by synchrotron radiation core-level photoelectron spectroscopy. JOURNAL OF PHYSICS. CONDENSED MATTER, vol. 20; p. 93001-, ISSN: 0953-8984 L. BIANCHETTIN, BARALDI A., S. DE GIRONCOLI, E. VESSELLI, S. LIZZIT, L. PETACCIA, G. COMELLI, R. ROSEI (2008). Core level shifts of under-coordinated Pt atoms. THE JOURNAL OF CHEMICAL PHYSICS, vol. 128; p. 114706-, ISSN: 0021-9606 E. VESSELLI, L. BIANCHETTIN, BARALDI A., A. SALA, G. COMELLI, L. PETACCIA, S. LIZZIT, S. DE GIRONCOLI (2008). The Ni3Al(111) surface structure: experiment and theory. JOURNAL OF PHYSICS. CONDENSED MATTER, vol. 20; p. 195223-195223-7, ISSN: 0953-8984 T. STAUDT, A. DESIKUSUMASTUTI, M. HAPPEL, E. VESSELLI, BARALDI A., S. GARDONIO, S. LIZZIT, F. ROHR AND J. LIBUDA (2008). Modelling NOx storage meterials: a high-resolution photoelectron spectroscopy study on the interaction of NO2 with Al2O3/NiAl(110) and BaO/Al2O3/NiAl(110). JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES, vol. 112; p. 9835-, ISSN: 1932-7447 VESSELLI E, CAMPANIELLO M, BARALDI A., BIANCHETTIN L, AFRICH C, ESCH F, LIZZIT S, COMELLI G. (2008). A Surface Core Level Shift Study of Hydrogen-Induced Ordered Structures on Rh(110). JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES, vol. 112; p. 14475-, ISSN: 1932-7447 VESSELLI E, DE ROGATIS L, DING X, BARALDI A., SAVIO L, VATTUONE L, ROCCA M, FORNASIERO P, PERESSI M., BALDERESCHI A, ROSEI R, COMELLI G (2008). Carbon Dioxide Hydrogenation on Ni(110). JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 130(34); p. 11417-11422, ISSN: 0002-7863, doi: 10.1021/JA802554G S. LIZZIT, Y. ZHANG, K.L. KOSTOV, L. PETACCIA, BARALDI A., R. LARCIPRETE, D. MENZEL, K. REUTER (2009). O- and H- induced surface core level shifts on Ru(0001): prevalence of the additivity rule. JOURNAL OF PHYSICS. CONDENSED MATTER, vol. 21; p. 134009-, ISSN: 0953-8984 M. BIANCHI, D. CASSESE, A. CAVALLIN, R. COMIN, F. ORLANDO, L. POSTREGNA, E. GOLFETTO, S. LIZZIT, BARALDI A. (2009). Clean and oxygen induced surface core level shift on Ir(111). NEW JOURNAL OF PHYSICS, vol. 11; p. 063002-, ISSN: 1367-2630 BIANCHETTIN L, BARALDI A., DE GIRONCOLI S, VESSELLI E, LIZZIT S, COMELLI G., ROSEI R (2009). Surface Core Level Shift: High Sensitive Probe to Oxygen-Induced Reconstruction of Rh(100). JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES, vol. 113; p. 13192-, ISSN: 1932-7447 S. LIZZIT, BARALDI A., CH. GRÜTTER, J.H. BILGRAM, PH. HOFMANN (2009). The surface phase transition and low temperature phase of a-Ga(010) studied by SPA-LEED. SURFACE SCIENCE, vol. 603; p. 3222-, ISSN: 00396028 P. LACOVIG, M. POZZO, D. ALFÈ, P. VILMERCATI, BARALDI A., S. LIZZIT (2009). Growth of dome-shaped carbon nanoislands on Ir(111): the intermediate between carbidic clusters and quasi free-standing graphene. PHYSICAL REVIEW LETTERS, vol. 103; p. 166101-, ISSN: 0031-9007 DE ROGATIS L, VESSELLI E, BARALDI A., CASULA M.F, MONTINI T, COMELLI G, GRAZIANI M, FORNASIERO P. (2009). Charge Redistribution at the Embedded Rh-Alumina Interface. JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES, vol. 113(42); p. 18069-18074, ISSN: 1932-7447, doi: 10.1021/JP905736Q Golfetto E., BARALDI A., Pozzo M., Alfè D., Sala A., Lacovig P., Vesselli E., Lizzit S., Comelli G., Rosei R. (2010). Determining the chemical reactivity trends of Pd/Ru(0001) pseudomorphic overlayers: core level shift measurements and DFT calculations. JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES, vol. 114 (2010); p. 436--, ISSN: 1932-7447 BALOG R., JORGENSEN B., NILSSON L., ANDERSEN M., RIENKS E., BIANCHI M., FANETTI M., LAESGAARD E., BARALDI A., LIZZIT S., SLJIVANCANIN Z., BESENBACHER F., HAMMER B., PEDERSEN T.G. HOFMANN PH., Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 218 HORNEKAER L. (2010). Band Gap Opening in Graphene Induced by Patterned Hydrogen Adsorption. NATURE MATERIALS, vol. 9 (2010); p. 315-319, ISSN: 1476-1122, doi: 10.1038/NMAT2710 VESSELLI E, RIZZI M, DE ROGATIS L, DING X, BARALDI A., COMELLI G, SAVIO L, VATTUONE L, ROCCA M, P. FORNASIERO, BALDERESCHI A, PERESSI M (2010). Hydrogen-assisted transformation of CO2 on nickel: the role of formate and carbon monoxide. THE JOURNAL OF PHYSICAL CHEMISTRY LETTERS, vol. 1; p. 402-406, ISSN: 1948-7185, doi: 10.1021/jz900221c. Lizzit S., Zampieri G., Petaccia L., Larciprete R., Lacovig P., Rienks E.D.L., Bihlmayer G., BARALDI A., Hofmann Ph. (2010). Band dispersion in the deep 1s core levels of graphene. NATURE PHYSICS, vol. 6; p. 345-349, ISSN: 1745-2473, doi: 10.1038/nphys1615 Lizzit S., BARALDI A. (2010). High resolution fast x-ray photoelectron spectroscopy study of ethylene interaction with Ir(111): from chemisorption to dissociation and graphene formation. CATALYSIS TODAY, vol. 154; p. 68-74, ISSN: 0920-5861, doi: 10.1016/j.cattod.2010.05.028 Vesselli E., BARALDI A., Lizzit S., Comelli G. (2010). Large Interlayer Relaxation at a Metal-Oxide Interface: The Case of a Supported Ultrathin Alumina Film. PHYSICAL REVIEW LETTERS, vol. 105; p. 046102-046105, ISSN: 0031-9007, doi: 10.1103/PhysRevLett.105.046102 POZZO M., ALFE`D., LACOVIG P., HOFMANN PH., LIZZIT S., BARALDI A. (2011). Thermal Expansion of Supported and Freestanding Graphene: Lattice Constant versus Interatomic Distance. PHYSICAL REVIEW LETTERS, vol. 106; p. 135501-135504, ISSN: 0031-9007, doi: 10.1103/PhysRevLett.106.135501 MINIUSSI E., POZZO M., BARALDI A., VESSELLI E., ZHAN R.R., COMELLI G., MENTES T.O., NINO M.A., LOCATELLI A., LIZZIT S., ALFE' D. (2011). Thermal Stability of Corrugated Epitaxial Graphene Grown on Re(0001). PHYSICAL REVIEW LETTERS, vol. 106/2011; p. 216101-216104, ISSN: 0031-9007, doi: 10.1103/PhysRevLett.106.216101 Larciprete R., Fabris S., Sun T., Lacovig P., BARALDI A., Lizzit S. (2011). Dual Path Mechanism in the Thermal Reduction of Graphene Oxide. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 2011; p. 17315-17321, ISSN: 0002-7863, doi: 10.1021/ja205168x Alberto Cavallin, Monica Pozzo, Cristina Africh, BARALDI A., Erik Vesselli, Carlo Dri, Giovanni Comelli, Rosanna Larciprete, Paolo Lacovig, Silvano Lizzit, Dario Alfè (2012). Local Electronic Structure and Density of Edge and Facet Atoms at Rh Nanoclusters Self-Assembled on a Graphene Template. 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DENTAL MATERIALS, vol. 25(5); p. 621-628, ISSN: 0109-5641, doi: 10.1016/J.DENTAL.2008.11.005 CADENARO M., MARCHESI G, ANTONIOLLI F, DAVIDSON C, DE STEFANO DORIGO E, BRESCHI L. (2009). Flowability of composites is no guarantee for contraction stress reduction. DENTAL MATERIALS, vol. 25(5); p. 649654, ISSN: 0109-5641, doi: 10.1016/J.DENTAL.2008.11.010 CARVALHO CA, MONTICELLI F, CANTORO A, BRESCHI L., FERRARI M (2009). Push-out bond strength of fiber posts luted with unfilled resin cement. JOURNAL OF ADHESIVE DENTISTRY, vol. 11; p. 65-70, ISSN: 1461-5185 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 222 KOMORI PC, PASHLEY DH, TJADERHANE L, BRESCHI L., MAZZONI A, DE GOES MF, WANG L, CARRILHO MR (2009). Effect of 2% chlorhexidine digluconate on the bond strength to normal vs caries-affected dentin. OPERATIVE DENTISTRY, vol. 43; p. 157-165, ISSN: 0361-7734 FALCONI M, TETI G, ZAGO M, GALANZI A, BRESCHI L., PELOTTI S, RUGGERI A, MAZZOTTI G (2009). Influence of a commercial tattoo ink on protein production in human fibroblasts. ARCHIVES OF DERMATOLOGICAL RESEARCH, vol. 301; p. 539-547, ISSN: 0340-3696 MAI S, KIM YK, TOLEDANO M, BRESCHI L., LING JQ, PASHLEY DH, TAY FR (2009). Phosphoric acid esters cannot replace polyvinylphosphonic acid as phosphoprotein analogs in biomimetic remineralization of resin-bonded dentin. DENTAL MATERIALS, vol. 25; p. 1230-1239, ISSN: 0109-5641 CADENARO M, PASHLEY DH, MARCHESI G, CARRILHO M, ANTONIOLLI F, MAZZONI A, TAY FR, DI LENARDA R, BRESCHI L. (2009). Influence of chlorhexidine on the degree of conversion and E-modulus of experimental adhesive blends. DENTAL MATERIALS, vol. 25(10); p. 1269-1274, ISSN: 0109-5641, doi: 10.1016/J.DENTAL.2009.05.008 NAVARRA C.O, CADENARO M, ARMSTRONG S.R, JESSOP J, ANTONIOLLI F, SERGO V., DI LENARDA R, BRESCHI L. (2009). Degree of conversion of Filtek Silorane Adhesive System and Clearfil SE Bond within the hybrid and adhesive layer: An in situ Raman analysis. DENTAL MATERIALS, vol. 25(9); p. 1178-1185, ISSN: 0109-5641, doi: 10.1016/J.DENTAL.2009.05.009 MALACARNE-ZANON J, PASHLEY DH, AGEE KA, FOULGER S, ALVES MC, BRESCHI L., CADENARO M, GARCIA FP, CARRILHO MR (2009). Effects of ethanol addition on the water sorption/solubility and percent conversion of comonomers in model dental adhesives. DENTAL MATERIALS, vol. 25(10); p. 1275-1284, ISSN: 0109-5641, doi: 10.1016/J.DENTAL.2009.03.015 MAZZONI A, MARCHESI G, CADENARO M, MAZZOTTI G, DI LENARDA R, FERRARI M, BRESCHI L. (2009). Pushout stress for fibre posts luted using different adhesive strategies. EUROPEAN JOURNAL OF ORAL SCIENCES, vol. 117; p. 447-453, ISSN: 0909-8836 NAVARRA C.O, CADENARO M, CODAN B, MAZZONI A, SERGO V., DE STEFANO DORIGO E, BRESCHI L. (2009). Degree of conversion and interfacial nanoleakage expression of three one-step self-etch adhesives. EUROPEAN JOURNAL OF ORAL SCIENCES, vol. 117; p. 463-469, ISSN: 0909-8836, doi: 10.1111/j.1600-0722.2009.00654.x CADENARO M., DELISE C, ANTONIOLLI F, NAVARRA CO, DI LENARDA R, BRESCHI L. (2009). Enamel and dentin bond strength following gaseous ozone application. JOURNAL OF ADHESIVE DENTISTRY, vol. 11; p. 287-292, ISSN: 1461-5185 SABOIA VP, SILVA FC, NATO F, MAZZONI A, CADENARO M., MAZZOTTI G, GIANNINI M, BRESCHI L. (2009). Analysis of differential artificial ageing of the adhesive interface produced by a two-step etch-and-rinse adhesive. EUROPEAN JOURNAL OF ORAL SCIENCES, vol. 117; p. 618-624, ISSN: 0909-8836 FERRARI M, CARVALHO CA, GORACCI C, ANTONIOLLI F, MAZZONI A, MAZZOTTI G, CADENARO M, BRESCHI L. (2009). Influence of luting material filler content on post cementation. JOURNAL OF DENTAL RESEARCH, vol. 88; p. 951-956, ISSN: 0022-0345 RUGGERI A, ORSINI G, MAZZONI A, NATO F, PAPA V, PICCIRILLI M, PUTIGNANO A, MAZZOTTI G, DE STEFANO DORIGO E, BRESCHI L. (2009). Immunohistochemical and biochemical assay of versican in human sound predentine/dentine matrix. EUROPEAN JOURNAL OF HISTOCHEMISTRY, vol. 53(3); p. 125-133, ISSN: 1121-760X MAZZONI A, PASHLEY DH, RUGGERI A JR, VITA F, FALCONI M, DI LENARDA R, BRESCHI L. (2008). Adhesion to chondroitinase ABC treated dentin. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH. PART B, APPLIED BIOMATERIALS, vol. 86B; p. 228-236, ISSN: 1552-4981 Marchesi G., Navarra C.O., Cadenaro M., Carrilho M.R., Codan B., Sergo V., Di Lenarda R., BRESCHI L. (2010). The effect of ageing on the elastic modulus and degree of conversion of two multistep adhesive systems. EUROPEAN JOURNAL OF ORAL SCIENCES, vol. 118; p. 304-310, ISSN: 0909-8836 Cadenaro M., Navarra C.O., Antoniolli F., Mazzoni A., Di Lenarda R., Rueggeberg F.A., BRESCHI L. (2010). The effect of curing mode on extent of polymerization and microhardness of dual-cured, self-adhesive resin cements. AMERICAN JOURNAL OF DENTISTRY, vol. 23; p. 14-18, ISSN: 0894-8275 Cadenaro M., Navarra C.O., Mazzoni A., Nucci C., Matis B.A., Di Lenarda R., BRESCHI L. (2010). An in vivo study of the effect of a 38 percent hydrogen peroxide in-office whitening agent on enamel. . THE JOURNAL OF THE AMERICAN DENTAL ASSOCIATION, vol. 141; p. 449-454, ISSN: 0002-8177 BRESCHI L., Martin P., Mazzoni A., Nato F., Carrilho M., Tjäderhane L., Visintini E., Cadenaro M., Tay F.R., Dorigo E.D., Pashley D.H. (2010). Use of a specific MMP-inhibitor (galardin) for preservation of hybrid layer. DENTAL MATERIALS, vol. 26; p. 571-578, ISSN: 0109-5641 Paragliola R., Franco V., Fabiani C., Mazzoni A., Nato F., Tay F.R., BRESCHI L., Grandini S. (2010). Final rinse optimization: influence of different agitation protocols. JOURNAL OF ENDODONTICS, vol. 36; p. 282-285, ISSN: 0099-2399 Cadenaro M., Antoniolli F., Codan B., Agee K., Tay F.R., De Stefano Dorigo E., Pashley D.H., BRESCHI L. (2010). Influence of different initiators on the degree of conversion of experimental adhesive blends in relation to their hydrophilicity and solvent content. DENTAL MATERIALS, vol. 26; p. 288-294, ISSN: 0109-5641 Sadek F.T., Mazzoni A., BRESCHI L., Tay F.R., Braga R.R. (2010). Six-month evaluation of adhesives interface created by a hydrophobic adhesive to acid-etched ethanol-wet bonded dentine with simplified dehydration protocols. JOURNAL OF DENTISTRY, vol. 38; p. 276-283, ISSN: 0300-5712 BRESCHI L., Mazzoni A., Nato F., Carrilho M., Visintini E., Tjäderhane L., Ruggeri A. Jr, Tay F.R., De Stefano Dorigo E., Pashley D.H. (2010). Chlorhexidine stabilizes the adhesive interface: a 2 year in vitro study. DENTAL MATERIALS, vol. 26; p. 320-325, ISSN: 0109-5641 Kim J., Gu L., BRESCHI L., Tjäderhane L., Choi K.K., Pashley D.H., Tay F.R. (2010). Implication of Ethanol Wetbonding in Hybrid Layer Remineralization. JOURNAL OF DENTAL RESEARCH, vol. 89; p. 575-580, ISSN: 00220345 Taschner M, Nato F, Mazzoni A, Frankenberger R, Krämer N, Di Lenarda R, Petschelt A, BRESCHI L. (2010). Role of preliminary etching for one-step self-etch adhesives. EUROPEAN JOURNAL OF ORAL SCIENCES, vol. 118; p. 517-524, ISSN: 0909-8836, doi: 10.1111/j.1600-0722.2010.00769.x. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 223 Kim J, Uchiyama T, Carrilho M, Agee KA, Mazzoni A, BRESCHI L., Carvalho RM, Tjäderhane L, Looney S, Wimmer C, Tezvergil-Mutluay A, Tay FR, Pashley DH. (2010). Chlorhexidine binding to mineralized versus demineralized dentin powder. DENTAL MATERIALS, vol. 26; p. 771-778, ISSN: 0109-5641 Carrilho MR, Carvalho RM, Sousa EN, Nicolau J, BRESCHI L., Mazzoni A, Tjäderhane L, Tay FR, Agee K, Pashley DH. (2010). Substantivity of chlorhexidine to human dentin. DENTAL MATERIALS, vol. 26; p. 779-785, ISSN: 0109-5641 Marchesi G, BRESCHI L., Antoniolli F, Di Lenarda R, Ferracane J, Cadenaro M. (2010). Contraction stress of lowshrinkage composite materials assessed with different testing systems. DENTAL MATERIALS, vol. 26; p. 947-953, ISSN: 0109-5641 Kim YK, Gu LS, Bryan TE, Kim JR, Chen L, Liu Y, Yoon JC, BRESCHI L., Pashley DH, Tay FR (2010). Mineralisation of reconstituted collagen using polyvinylphosphonic acid/polyacrylic acid templating matrix protein analogues in the presence of calcium, phosphate and hydroxyl ions. BIOMATERIALS, vol. 31; p. 6618-6627, ISSN: 0142-9612 Tezvergil-Mutluay A, Agee KA, Hoshika T, Carrilho M, BRESCHI L., Tjäderhane L, Nishitani Y, Carvalho RM, Looney S, Tay FR, Pashley DH. (2010). The requirement of zinc and calcium ions for functional MMP activity in demineralized dentin matrices. DENTAL MATERIALS, vol. 26; p. 1059-1067, ISSN: 0109-5641 TEZVERGIL-MUTLUAY A, MUTLUAY MM, GU LS, ZHANG K, AGEE KA, CARVALHO RM, MANSO A, CARRILHO M, TAY FR, BRESCHI L., SUH BI, PASHLEY DH. (2011). The anti-MMP activity of benzalkonium chloride. JOURNAL OF DENTISTRY, vol. 39; p. 57-64, ISSN: 0300-5712 PASHLEY DH, TAY FR, BRESCHI L., TJÄDERHANE L, CARVALHO RM, CARRILHO M, TEZVERGIL-MUTLUAY A. (2011). State of the art etch-and-rinse adhesives. DENTAL MATERIALS, vol. 27; p. 1-16, ISSN: 0109-5641 TEZVERGIL-MUTLUAY A, AGEE KA, UCHIYAMA T, IMAZATO S, MUTLUAY MM, CADENARO M, BRESCHI L., NISHITANI Y, TAY FR, PASHLEY DH. (2011). The Inhibitory Effects of Quaternary Ammonium Methacrylates on Soluble and Matrix-bound MMPs. JOURNAL OF DENTAL RESEARCH, vol. 90; p. 535-540, ISSN: 0022-0345 TOLEDANO M, MAZZONI A, MONTICELLI F, BRESCHI L., OSORIO E, OSORIO R. (2011). ElectroBond application may improve wetting characteristics of etched dentine. JOURNAL OF DENTISTRY, vol. 39; p. 180-186, ISSN: 0300-5712 MAZZONI A, PAPA V, NATO F, CARRILHO M, TJÄDERHANE L, RUGGERI A JR, GOBBI P, MAZZOTTI G, TAY FR, PASHLEY DH, BRESCHI L. (2011). Immunohistochemical and biochemical assay of MMP-3 in human dentine. JOURNAL OF DENTISTRY, vol. 39; p. 231-237, ISSN: 0300-5712 LIU Y, LI N, QI Y, NIU LN, ELSHAFIY S, MAO J, BRESCHI L., PASHLEY DH, TAY FR. (2011). The use of sodium trimetaphosphate as a biomimetic analog of matrix phosphoproteins for remineralization of artificial caries-like dentin. DENTAL MATERIALS, vol. 27; p. 465-477, ISSN: 0109-5641 Orsini G, Stacchi C, Visintini E, Di Iorio D, Putignano A, BRESCHI L., Di Lenarda R. (2011). Clinical and histologic evaluation of fresh frozen human bone grafts for horizontal reconstruction of maxillary alveolar ridges. THE INTERNATIONAL JOURNAL OF PERIODONTICS & RESTORATIVE DENTISTRY, vol. 31; p. 535-544, ISSN: 01987569 Liu Y, Tjäderhane L, BRESCHI L., Mazzoni A, Li N, Mao J, Pashley DH, Tay FR. (2011). Limitations in bonding to dentin and experimental strategies to prevent bond degradation. 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DENTAL MATERIALS, vol. 27; p. 1180-1186, ISSN: 0109-5641 Cova A, BRESCHI L., Nato F, Ruggeri A Jr, Carrilho M, Tjäderhane L, Prati C, Di Lenarda R, Tay FR, Pashley DH, Mazzoni A. (2011). Effect of UVA-activated Riboflavin on Dentin Bonding. JOURNAL OF DENTAL RESEARCH, vol. 90; p. 1439-1445, ISSN: 0022-0345 Cadenaro M., Codan B., Navarra C.O., Marchesi G., Turco G., Di Lenarda R., BRESCHI L. (2011). Contraction stress, elastic modulus, and degree of conversion of three flowable composites. EUROPEAN JOURNAL OF ORAL SCIENCES, vol. 119; p. 241-245, ISSN: 0909-8836 Tezvergil-Mutluay A, Mutluay MM, Gu LS, Zhang K, Agee KA, Carvalho RM, Manso A, Carrilho M, Tay FR, BRESCHI L., Suh BI, Pashley DH. (2011). The anti-MMP activity of benzalkonium chloride. JOURNAL OF DENTISTRY, vol. 39; p. 57-64, ISSN: 0300-5712 Pashley DH, Tay FR, BRESCHI L., Tjäderhane L, Carvalho RM, Carrilho M, Tezvergil-Mutluay A. (2011). State of the art etch-and-rinse adhesives. 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ElectroBond application may improve wetting characteristics of etched dentine. JOURNAL OF DENTISTRY, vol. 39; p. 180-186, ISSN: 03005712 Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 224 COVA A, BRESCHI L., NATO F, RUGGERI A JR, CARRILHO M, TJÄDERHANE L, PRATI C, DI LENARDA R, TAY FR, PASHLEY DH, MAZZONI A. (2011). Effect of UVA-activated riboflavin on dentin bonding. JOURNAL OF DENTAL RESEARCH, vol. 90 (12); p. 1439-1445, ISSN: 0022-0345 Tezvergil-Mutluay A., Mutluay M.M., Agee K.A., Seseogullari-Dirihan R., Hoshika T., Cadenaro M., BRESCHI L., Vallittu P., Tay F.R., Pashley D.H. (2012). Carbodiimide cross-linking inactivates soluble and matrix-bound MMPs, in vitro. JOURNAL OF DENTAL RESEARCH, vol. 91; p. 192-196, ISSN: 0022-0345, doi: 10.1177/0022034511427705 Navarra C.O., Goracci C., BRESCHI L., Vichi A., Corciolani G., Cadenaro M., Ferrari M. (2012). Influence of post type on degree of conversion of a resin-based luting agent. 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Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 266 9.Criteri di valuatazione delle scuole di dottorato Nell’attesa dell’emanazione del nuovo decreto di disciplina del dottorato di ricerca (ex art. 19 L. 240/2010), il Nucleo di Valutazione ha stabilito di utilizzare nella valutazione delle proposte di Corsi e Scuole di Dottorato per l’anno 2012 (XXVIII ciclo) il medesimo modello di valutazione utilizzato lo scorso anno, salvo nuove indicazioni operative che dovessero pervenire dal MIUR. RIFERIMENTI NORMATIVI DM.224 Nota DM.50/2010 /99 art.2 MIUR Programmazio ne 2010-2012 n.640/2 INDIRI ZZI INDICATORI E RANGE GIUDIZI MIUR 011 punti a) b) - comma 3 lett. a), b), c) (ovvero 1° - 2° 3° Requisit o) punto c) comma 3 lett. d) (ovvero 4° Requisit o) punto B12 1 Qualità scientifi ca, elevati requisit i di struttur ee risorse per la ricerca 2 Impatt o dottora to – mondo produtt ivo a) Composizione collegio docenti N docenti esclusivi nei SSD del corso b) Produzione scientifica del collegio docenti Valutazione c) Pubblicazioni scientifiche dei dottorandi Valutazione d) Iniziative di pubblicizzazione delle tesi di dottorato Valutazione POSITIVO / NEGATIVO (è obbligatorio per tutti OpenstarTS) e) Disponibilità risorse e strutture Valutazione INSUFF – SUFF – BUONO OTTIMO f) Livello di soddisfazione dei dottorandi % soddisfatti questionario dottorandi 2010 >= 50% INSUFF 35%< = <50% SUFF 20%<= <35% BUONO <20% OTTIMO a) Inserimento lavorativo dottori di ricerca (monitoraggio annuale inviato al NV) % dottori con inserimento lavorativo connesso al titolo ultimi 6 anni %<=30 o non fornito => INSUFF 30< % <=50 => SUFF 50< % <=70 => BUONO % >70 => OTTIMO b) Cofinanziamento delle borse previsto per il XXVII ciclo % borse finanziate con fondi privati italiani e stranieri % <= 10 BASSO 10 < % <= 30 MEDIO % > 30 ALTO c) Fonte di finanziamento dei progetti di ricerca attivi nei dipartimenti proponenti % di fondi provenienti da privati italiani e stranieri Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 N >= min => ADEGUATO N < min => NON ADEGUATO INSUFF – SUFF – BUONO OTTIMO INSUFF – SUFF – BUONO OTTIMO % <= 10 BASSO 10 < % <= 30 MEDIO % > 30 ALTO 267 RIFERIMENTI NORMATIVI DM.224 Nota DM.50/20 /99 art.2 MIUR 10 n.640/2 Program mazione 011 INDIRIZZI MIUR INDICATORI E RANGE GIUDIZI 20102012 punto d) punto B12 3 a) Attrattività dottorato Razionalizza zione dei corsi b) Attrattività dottorato sulle altre sedi comma 3 lett. b) (ovvero 2° Requisit o) c) Apertura sede N candidati presenti alla prova/ N posti con borsa banditi N candidati laureati altro ateneo presenti alla prova / N totale candidati presenti alla prova N iscritti dottorato provenienti da altri atenei / N iscritti totali d) Dimensione prevista del dottorato N posti ordinari XXVII e) Dimensione effettiva del dottorato media degli iscritti negli ultimi 3 cicli (confrontata con posti e borse previsti) punto e) comma 2 comma 3 lett. a), e) (ovvero 1° - 5° Requisit o) - 4 Ampiezza delle tematiche scientifiche con riferimento a discipline riconoscibili a livello internazional e a) Denominazione chiara e traducibile Valutazione b) Coerenza tra tematiche scientifiche e denominazione Valutazione c) Ampiezza tematiche scientifiche N SSD di riferimento del corso d) Adeguata formulazione delle tematiche scientifiche e degli obiettivi formativi Valutazione Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 N < 2 BASSA 2 <= N <= 4 MEDIA N > 4 ALTA % <= 10 BASSA 10 < % <= 25 MEDIO-BASSA 25 < % <= 45 MEDIA 45 < % <= 60 MEDIO-ALTA % > 60 ALTA % <= 10 BASSA 10 < % <= 25 MEDIO-BASSA 25 < % <= 45 MEDIA 45 < % <= 60 MEDIO-ALTA % > 60 ALTA ADEGUATA – NON ADEGUATA (con riferimento al tipo corso e agli iscritti effettivi) ADEGUATA – NON ADEGUATA (con riferimento al tipo corso e al numero delle borse) ADEGUATA – NON ADEGUATA SI – NO ADEGUATA se N >= 3 NON ADEGUATA se N < 3 ADEGUATA – NON ADEGUATA 268 RIFERIMENTI NORMATIVI DM.224 /99 art.2 Nota MIUR n.640/2 011 DM.50/20 10 punto f) - comma 3 lett. d) (ovvero 4° Requisit o) INDIRIZZI MIUR INDICATORI E RANGE GIUDIZI Program mazione 20102012 5 Internaziona lizzazione a) Convenzioni con soggetti esteri per attività formative dottorandi b) Fonte di finanziamento dei progetti di ricerca attivi nei dipartimenti proponenti c) Presenza di iscritti stranieri d) Sito web del dottorato Valutazione PREVISTE – NON PREVISTE % di fondi provenienti da soggetti stranieri N iscritti stranieri / N iscritti totali Valutazione % <= 20 BASSO 20 < % <= 40 MEDIO % > 40 ALTO % < 10 BASSO 10 <= % < 20 MEDIO % > =20 ALTO INSUFFICIENTE - SCARSO – SUFFICIENTE – DISCRETO – BUONO – MOLTO BUONO – OTTIMO comma 3 lett. f) (ovvero 6° Requisit o) - - 6 Adozione di sistemi di valutazione Valutazione ADEGUATO – NON ADEGUATO Sistemi di Valutazione Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 269 10.Valutazione da parte del nucleo di valutazione dell’Ateneo Dati ufficiali presenti nella relazioen del nucleo, che non sono quelli definitivi per il XXVII cilco. Criterio tipo_rec ord nome_dottorato nuova_istituzione anno_attivazione Dipartimento cognome _docente nome_docente Borse cofinanziate Borse richieste all'Ateneo Iscritti con Borsa Valutazione cofinanziamento Posti ordinari Cofinanziamento dichiarato Cofinanziamento a consuntivo N. Componenti esclusivi Collegio (vincolo >=10) N. candidati presenti alla prova di ammissione N. candidati presenti alla prova di ammissione provenienti da altro ateneo Valutazione attrattività della sede Composizione Collegio docenti eProduzione Scientifica Obiettivi formativi e progetto scientifico (1° requisito DM 224/99) Disponibilità risorse e strutture (2° requisito DM 224/99) Rapporto del dottorato con il mondo lavoro: monitoraggio inserimento lavorativo Obbiettivi formativi e progetto scientifico Valutazione sistemi di valutazione (6° requisito DM 224/99) Valutazione sito web Soddisfazione dottorandi Valutazione produzione scientifica dottorandi Valutazione complessi va Valutazione Scuola di dottorato senza indirzzi NANOTECNOLOGIE Rinnovo 2006 Dipartimento di Fisica Fermeglia Maurizio 7 7 17 POSITIVO 36 54.55% 80.28% 28 28 14 MEDIO - ALTA OTTIMO POSITIVO OTTIMO OTTIMO ADEGUATO ADEGUATO OTTIMO OTTIMO OTTIMA A+ (OTTIMO) Il documento completo di valutazione di tutte le scuole di dottorato dell’università di Trieste è riportato in allegato. Questo documento è utile per posizionare la scuola anche in relativo rispetto alle altre scuole e corsi di dottorati valutati con lo stesso metro. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 270 11. Giudizi dei referee esterni per dottorandi ammessi all’esame finale aprile 2012 Di seguito sono riportati i referee esterni scelti dal collegio per ciascuno dei dottorandi: Dottorando Astolfo Alberto Titolo Supervisore Development of novel ARFELLI experimental methods for Fulvia cell tracking using nanoparticles Bellomo Francesca Biopolymer based scaffold for tissue engineering Birarda Giovanni Development of microfluidic devices for biomedical applications of Synchrotron Radiation FTIR Microspectroscopy Nanoscale interaction for higher efficiency of contrast media Analysis of aging and stability of bonded interface in dentistry Fontanive Luca Marchesi Giulio Reviewers L. Dean Chapman, PhD Professor, Anatomy & Cell Biology, University of Saskatchewan Dr. Juergen Mollenhauer NMI Naturwissenschaftliches und Medizinisches Institut University of Tübingen, PAOLETTI Dr. Niko Moritz Sergio University of Turku, Finland, Orthopaedic Research Unit Dr. Judith Juhasz University of Cambridge, United Kingdom FRANCIOSI Dr. Paul Dumas Alfonso / Lisa synchrotron-soleil.fr Vaccari Dr. Nikolaj Gadegaard [email protected] CESARO Attilio BRESCHI Lorenzo Rampino Antonio Polysaccharide based CESARO nanoparticles for drug Attilio delivery Santarelli Xenja Development of ROSEI Renzo capabilities for ‘in situ’ analysis of nanoparticles at the MCX powder diffraction Beamline Influence of nanostructure MORGANTE on the electronic properties Alberto of heterojunctions in photovoltaic cells Sovernigo Enrico Prof. Assuntina Morresi - Dipartimento di Chimica, Università di Perugia Alessandro Maiocchi - Centro Ricerche Bracco Prof. Steve Armstrong, Department of Operative Dentistry, College of Dentistry, The University of Iowa - Iowa City, Iowa, USA Prof. Marcela Carrilho, GEO/UNIBAN,Health Institute, Bandeirante University of São Paulo, São Paulo, Brazil Carla M. Caramella - Department of Pharmaceutical Chemistry - University of Pavia – Paolo BLASI, Ph.D.Dip. Chimica e Tecnologia del Farmaco - Università di Perugia Prof. Alvise Benedetti Univ. Ca Foscari: Prof. Jennifer Mac Load, NFL Montreal: Prof. Dr. Gvido Bratina Università Ljubliana, SLO Dr.ssa Francesca Brunetti, University of Rome "Tor Vergata" Vedi dettaglio negli allegati. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 271 12.Presentazioni dei dottorandi al congesso del gennaio 2012 Le presentazioni PPT dei dottorandi al congresso del gennaio 2012 sono riportate negli allegati. Scuola di dottorato di ricerca in Nanotecnologie: attività 2011 272