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 HAuCl 4. 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.
| Original language | English |
|---|---|
| Pages (from-to) | 719-723 |
| Number of pages | 5 |
| Journal | Journal of Dispersion Science and Technology |
| Volume | 33 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2012 |
Bibliographical note
Funding Information:E. L. R. acknowledges a fellowship from CONACYT-Mexico. J. T. thanks Professor Phil Pincus, Professor Joe Zasadzinski, and the MRL-UCSB for their hospitality during a sabbatical leave as well as CONACYT-Mexico for financial support. The TEM experiments were performedin the Laboratorio de Microscopía Electrónica of Universidad de Sonora and Centre Pluridiscipli-naire de Microscopie Électronique et de Microanalyse, Faculté des Sciences et Techniques de St-Jérôme, Aix-Marseille III.
Keywords
- Bimetallic
- copper-gold
- core-shell
- microemulsion
- nanoparticles