Figure S1

SIZE
CONTROLLED
GOLD
NANOPARTICLES
INSIDE
POLY(ACRYLAMIDE) MICROGELS
M. DÍAZ1, A. BARRERA2, S. LÓPEZ-CUENCA5, S. Y. MARTÍNEZ-SALAZAR2, M.
RABELERO3, I. CEJA4, V. V. A. FERNÁNDEZ1 AND J. AGUILAR1
Departamentos de Ciencias Tecnológicas1 y Básicas2, Universidad de Guadalajara, Av.
Universidad # 1115, 47820 Ocotlán, Jalisco, México
Departamentos de Ingeniería Química3 y Física4, Universidad de Guadalajara, Blvd. M.
García Barragán # 1451, 44430 Guadalajara, Jalisco, México
Instituto Tecnológico Superior de Tequila5, Joel Magallanes Rubio #501, Col. Lomas del
Paraíso, 46400 Tequila, Jalisco, México
Journal of Applied Polymer Science
Correspondence: J. Aguilar (E-mail: [email protected])
Semicontinuous Inverse Heterophase
Polymerization
AuNP-PAAm
Sonication
Microgels in
HAuCl4 solution
Swollen micelles with
microgel of polyacrylamide
Removal of surfactant
molecules with bidistilled water
Figure S1 Synthesis of poly(acrylamide) microgels (PAAm) and gold nanoparticles
(AuNPs) into a crosslinked network of poly(acrylamide) microgels (AuNP-PAAm). Figure S2 Dry microgels of PAAm synthesized by SIHP. Figure S2 shows microgels synthesized by Semicontinuous inverse heterophase
polymerization (SIHP) that exhibit a quasi-spherical morphology. The microgels are
dispersed with different sizes and a few agglomerations are observed.
Figure S3 Tonalities after reaction reduction of gold from the different concentrations of
Gold(III) Chloride Trihydrate (HAuCl4).
In the Figure S3, it was observed that there are not AuNPs precipitated in the bottom of the
container. We propose that they could remain stable for a long time, probably, due to
chemical interaction between AuNPs and PAAm.
1.6
Time
1.2
0.8
(0 min)
0.4
0.0
450
(120 min)
Absorbance (a.u.)
2.0
500
550
600
650
Wavelength (nm)
700
750
Figure S4 UV-Vis spectra of the reaction times for the concentration 1.3 mM of HAuCl4
measured at 12 min intervals.