Scattering Spectra of Single Gold Nanoshells

Single particle dark field spectroscopy has been combined with high-resolution scanning electron and atomic force microscopy to study the scattering spectra of single gold/silica nanoshells. The plasmon resonant peak energies match those calculated by Mie theory based on the nanoshell geometry. The...

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Bibliographic Details
Published in:Nano letters 2004-12, Vol.4 (12), p.2355-2359
Main Authors: Nehl, Colleen L, Grady, Nathaniel K, Goodrich, Glenn P, Tam, Felicia, Halas, Naomi J, Hafner, Jason H
Format: Article
Language:English
Subjects:
Collective effects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Electron states
Exact sciences and technology
Exchange, correlation, dielectric and magnetic functions, plasmons
Materials science
Nanopowders
Nanoscale materials and structures: fabrication and characterization
Physics
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Summary:Single particle dark field spectroscopy has been combined with high-resolution scanning electron and atomic force microscopy to study the scattering spectra of single gold/silica nanoshells. The plasmon resonant peak energies match those calculated by Mie theory based on the nanoshell geometry. The resonance line widths fit Mie theory without the inclusion of a size-dependent surface scattering term, which is often included to fit ensemble measurements. These results suggest that plasmon spectral measurements of nanoparticle ensembles are broadened due to particle inhomogeneity.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl048610a