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Optical Properties of Star-Shaped Gold Nanoparticles

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posted on 12.04.2006, 00:00 by Colleen L. Nehl, Hongwei Liao, Jason H. Hafner
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.