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Título

Metallic nanoparticle arrays: A common substrate for both surface-enhanced raman scattering and surface-enhanced infrared absorption

Autor Wang, Hui; Halas, Naomi J.; Aizpurua, Javier ; Nordlander, Peter
Palabras clave SEIRA
SERS
Nanoshell
Plasmon hybridization
Plasmonics
Surface enhanced spectroscopy
Fecha de publicación 2008
EditorAmerican Chemical Society
Citación ACS Nano 2(4): 707-718 (2008)
ResumenNanoshell arrays have recently been found to possess ideal properties as a substrate for combining surface enhanced raman scattering (SERS) and surface enhanced infrared absorption (SEIRA) spectroscopies, with large field enhancements at the same spatial locations on the structure. For small interparticle distances, the multipolar plasmon resonances of individual nanoshells hybridize and form red-shifted bands, a relatively narrow band in the near-infrared (NIR) originating from quadrupolar nanoshell resonances enhancing SERS, and a very broadband in the mid-infrared (MIR) arising from dipolar resonances enhancing SEIRA. The large field enhancements in the MIR and at longer wavelengths are due to the lightning-rod effect and are well described with an electrostatic model.
Descripción 12 pages, 10 figures.-- et al.
Versión del editorhttp://dx.doi.org/10.1021/nn800047e
URI http://hdl.handle.net/10261/8414
DOI10.1021/nn800047e
ISSN1936-0851
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