Optical properties of star-shaped gold nanoparticles.

Nehl, Colleen L; Liao, Hongwei; Hafner, Jason H · Nano Lett · 2006

basic_science · Level V

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Abstract

Here we report the synthesis, structure, and optical properties of ca. 100 nm star-shaped gold nanoparticles. Single particle spectroscopy measurements revealed that these nanoparticles have multiple plasmon resonances resulting in polarization-dependent scattering with multiple spectral peaks, which correspond to the different tips on the star-shaped structure. The plasmon resonances were also found to be extremely sensitive to the local dielectric environment.

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