Synthesis and Characterization of Bimetallic Copper-Gold Nanoparticles |
| |
| Authors: | Eduardo Larios Zulema Molina Amir Maldonado |
| |
| Affiliation: | 1. Departamento de Investigación en Polímeros y Materiales , Universidad de Sonora , Hermosillo , Sonora , México;2. Departamento de Ingeniería Química y Metalurgia , Universidad de Sonora , Hermosillo , Sonora , México;3. Departamento de Investigación en Polímeros y Materiales , Universidad de Sonora , Hermosillo , Sonora , México;4. Departamento de Física , Universidad de Sonora , Hermosillo , Sonora , México |
| |
| Abstract: | We have synthesized copper-gold, core-shell nanoparticles by the microemulsion method. The particles were prepared in two steps, by first reducing copper ions and then gold ions in the aqueous domains of anionic microemulsions. Two surfactants have been used as emulsifiers, AOT and Cu(AOT)2. The latter is the source of copper ions. Gold ions come from aqueous solutions of HAuCl4. Ultraviolet-visible spectroscopy experiments show that copper nanoparticles are created in the first step of the synthesis, and that a gold layer covers them in the second step. Transmission electron microscopy and related techniques confirm the formation of copper (core)-gold (shell) nanocrystals. |
| |
| Keywords: | Bimetallic copper-gold core-shell microemulsion nanoparticles |
|
|
