Optical Properties of Star-Shaped Gold Nanoparticles

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, whic...

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Veröffentlicht in:	Nano letters 2006-04, Vol.6 (4), p.683-688
Hauptverfasser:	Nehl, Colleen L, Liao, Hongwei, Hafner, Jason H
Format:	Artikel
Sprache:	eng
Schlagworte:	Anisotropy Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Exact sciences and technology Gold - analysis Gold - chemistry Gold - radiation effects Light Materials science Materials Testing Molecular Conformation Nanoscale materials and structures: fabrication and characterization Nanostructures - chemistry Nanostructures - radiation effects Nanostructures - ultrastructure Nanotechnology - methods Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of specific thin films Optics and Photonics Other topics in nanoscale materials and structures Physics Surface Plasmon Resonance - methods
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Beschreibung
Zusammenfassung:	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.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl052409y