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Silver/Gold Heterometallic Nanostructures and Their Surface Plasmon-related Behaviors

Published online by Cambridge University Press:  01 February 2011

Hyunjoon Song
Hyunjoon Song*
Affiliation:
[email protected], KAIST, Chemistry, 335 Gwahangno, Yuseong-gu, Daejeon, 305701, Korea, Republic of, 82423502847, 82423502810
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Abstract

A combination of silver and gold is demonstrated in nanoscale objects. Silver and gold have similar but distinct chemical and physical properties. We employed three main chemistry related to silver and gold – underpotential deposition, epitaxial growth, and Galvanic replacement. Selective underpotential deposition of silver guided the growth direction of gold and generated gold octahedrons, cuboctahedrons, cubes, and rods. Epitaxial growth of silver on gold decahedral seeds formed silver-gold-silver heterometallic nanorods and wires. Galvanic replacement of silver for gold yielded asymmetric single hollow and symmetric double hollow structures. All silver/gold nanostructures exhibited characteristic optical features in the UV-vis-NIR ranges. Such structural variation and corresponding optical properties are useful for diverse applications in electronics, photonics, biology, and catalysis.

Keywords

AgAunanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1257: Symposium O – Multifunctional Nanoparticle Systems-Coupled Behavior and Applications , 2010 , 1257-O01-04
Copyright
Copyright © Materials Research Society 2010

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