Synthesis of silver-gold alloy nanoparticles by a phase-transfer system

Chimentao, RJ; Cota, I; Dafinov, A; Medina, F; Sueiras, JE; de la Fuente, JLG; Fierro, JLG; Cesteros, Y; Salagre, P

Abstract

We have studied the preparation of silver-gold alloy nanoparticles based on the phase transfer of metal precursors from aqueous phase to organic solution by a fatty amine at room temperature. Silver-gold nanoparticles were synthesized with different molar ratios (2:1, 1:1, 1:2). Ultraviolet-visible absorption spectra suggested the formation of alloy phases. The elemental Ag:Au ratios in the bimetallic nanoparticles determined by energy dispersive x-ray analysis (EDX) were consistent with the Ag:Au molar ratios used in the feeding solution. Transmission electron microscopy (TEM) revealed the formation of a uniform size distribution of Ag:Au nanoparticles (around 5 nm). X-ray photoelectron spectroscopy (XPS) showed that the composition in the outer part of the Ag:Au nanoparticles was similar to that obtained by EDX analysis, which indicates the formation of homogeneous silver-gold nanoparticles. Silver-gold alloy nanoparticles on a gram scale can be obtained with this method.

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Título según WOS: ID WOS:000234582900014 Not found in local WOS DB
Título de la Revista: JOURNAL OF MATERIALS RESEARCH
Volumen: 21
Número: 1
Editorial: SPRINGER HEIDELBERG
Fecha de publicación: 2006
Página de inicio: 105
Página final: 111
DOI:

10.1557/JMR.2006.0014

Notas: ISI