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

AuthorsWang, Hui; Halas, Naomi J.; Aizpurua, Javier ; Nordlander, Peter
Plasmon hybridization
Surface enhanced spectroscopy
Issue Date2008
PublisherAmerican Chemical Society
CitationACS Nano 2(4): 707-718 (2008)
AbstractNanoshell 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.
Description12 pages, 10 figures.-- et al.
Publisher version (URL)http://dx.doi.org/10.1021/nn800047e
Appears in Collections:(CFM) Artículos
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