2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Synthesis of Silver Nanoparticles in Nonaqueous Microemulsions

E. Rodríguez-León, E. Larios-Rodríguez, J. Tánori, R. Herrera and A. Maldonado
Universidad de Sonora, MX

Keywords:
nanoparticles, microemulsions

Abstract:
We have synthesized silver nanocrystals in microemulsion phases by adapting the polyol process. The particles have been characterized by UV-Vis spectroscopy and Transmission Electron Microscopy. Our results indicate that it is possible to use the polyol process in microemulsions. The UV-Vis spectra display a shoulder, near 410 nm, as expected for a suspension of silver particles. This result is confirmed by electron diffraction, from which the lattice parameter for silver is obtained (a ~ 4.08 Å). The characteristics of the resulting nanoparticles (shape, size, distribution) depends on the microstructure of the solutions. Bicontinuous phases produced some elongated particles, while phases composed of O/W or W/O droplets produced only spherical particles.

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