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Nano Lett. 2015 Apr 8;15(4):2600-4. doi: 10.1021/acs.nanolett.5b00146. Epub 2015 Mar 9.

Demonstrating photoluminescence from Au is electronic inelastic light scattering of a plasmonic metal: the origin of SERS backgrounds.

Author information

1
†NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, United Kingdom.

Abstract

Temperature-dependent surface-enhanced Raman scattering (SERS) is used to investigate the photoluminescence and background continuum always present in SERS but whose origin remains controversial. Both the Stokes and anti-Stokes background is found to be dominated by inelastic light scattering (ILS) from the electrons in the noble metal nanostructures supporting the plasmon modes. The anti-Stokes background is highly temperature dependent and is shown to be related to the thermal occupation of electronic states within the metal via a simple model. This suggests new routes to enhance SERS sensitivities, as well as providing ubiquitous and calibrated real-time temperature measurements of nanostructures.

KEYWORDS:

SERS background; electronic SERS; inelastic scattering; metal photoluminescence; plasmonics

PMID:
25734469
PMCID:
PMC4415038
DOI:
10.1021/acs.nanolett.5b00146
[Indexed for MEDLINE]
Free PMC Article

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