Nano Archive

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

Le, Fei and Brandl, Daniel W. and Urzhumov, Yaroslav A. and Wang, Hui and Kundu, Janardan and Halas, Naomi J. and Aizpurua, Javier and Nordlander, Peter (2008) Metallic nanoparticle arrays: A common substrate for both surface-enhanced Raman scattering and surface-enhanced infrared absorption. ACS NANO, 2 (4). pp. 707-718.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nn800047e

Abstract

Nanoshell 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.

Item Type:Article
Uncontrolled Keywords:nanoshell; SERS; SEIRA; plasmonics; surface enhanced spectroscopy; plasmon hybridization
Subjects:Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Analytical Science > Beam methods
ID Code:2654
Deposited By:Anuj Seth
Deposited On:27 May 2009 12:30
Last Modified:27 May 2009 12:30

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