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Shape-dependent plasmon resonances of gold nanoparticles

2008; Royal Society of Chemistry; Volume: 18; Issue: 21 Linguagem: Inglês

10.1039/b714950f

1364-5501

Colleen L. Nehl, Jason H. Hafner,

Nanoparticle-Based Drug Delivery

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.