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Physics, chemistry and biology of Soft Matter
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J. Mater. Chem., 2008, 18, 2415 - 2419, DOI: 10.1039/b714950f
Shape-dependent plasmon resonances of gold nanoparticles
Colleen L. Nehl and Jason H. Hafner
Localized surface plasmon resonances in noble metal nanoparticles cause enhanced optical absorption and scattering that is tunable through the visible and near-infrared. Furthermore, these resonances create large local electric field enhancements at the nanoparticle surfaces, essentially focussing light at the nanometer scale. These properties suggest a range of applications, including biomedical imaging, therapeutics, and molecular sensing. Here we review some recent advances regarding shape-dependent optical properties of two specific nanoparticle geometries: gold nanorods and branched gold nanoparticles.

