Structures and optical properties of 4–5 nm bimetallic AgAu nanoparticles

Z. Y. Li; J. P. Wilcoxon; F. Yin; Y. Chen; R. E. Palmer; R. L. Johnston

doi:10.1039/B708958A

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Faraday Discussions

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Structures and optical properties of 4–5 nm bimetallic AgAu nanoparticles

Z. Y. Li , J. P. Wilcoxon , F. Yin , Y. Chen , R. E. Palmer and R. L. Johnston

Faraday Discuss., 2008, 138, 363-373

DOI: 10.1039/B708958A
Received 13 Jun 2007, Accepted 22 Jun 2007
First published on the web 17 Sep 2007
This article is part of the collection: Nanoalloys

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Abstract
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Three types of bimetallic AgAu nanoparticles, with mean size of 4–5 nm, Ag_coreAu_shell, Au_coreAg_shell and alloyed AgAu, have been synthesized using an inverse micelle method. To image these small size nanoparticles, quantitative high angle annular dark field imaging using scanning transmission electron microscopy was successfully applied. Our results show that good control of nanoparticle size dispersion and composition modulation was achieved. Optical properties of the nanoparticles are correlated with direct internal structure analysis. The structural stability is discussed, based on thermodynamic considerations.

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Z. Y. Li
J. P. Wilcoxon
F. Yin
Y. Chen
R. E. Palmer
R. L. Johnston

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Structures and optical properties of 4–5 nm bimetallic AgAu nanoparticles

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