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J Phys Chem B. 2006 Aug 17;110(32):15666-75.

Maneuvering the surface plasmon resonance of silver nanostructures through shape-controlled synthesis.

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  • 1Departments of Chemical Engineering and Chemistry, University of Washington, Seattle, Washington 98195, and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P. R. China.

Abstract

Silver nanostructures are containers for surface plasmons - the collective oscillation of conduction electrons in phase with incident light. By controlling the shape of the container, one can control the ways in which electrons oscillate, and in turn how the nanostructure scatters light, absorbs light, and enhances local electric fields. With a series of discrete dipole approximation (DDA) calculations, each of a distinctive morphology, we illustrate how shape control can tune the optical properties of silver nanostructures. Calculated predictions are validated by experimental measurements performed on nanocubes with controllable corner truncation, right bipyramids, and pentagonal nanowires. Control of nanostructure shape allows optimization of plasmon resonance for molecular detection and spectroscopy.

PMID:
16898709
[PubMed - indexed for MEDLINE]
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