Are plasmons responsible for the Raman signal enhancement observed with gold nanoparticle sensors?
- Chou, Alison
- Jaatinen, Esa
- Fredericks, Peter
Publication date
January 2011
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE)Abstract
The electromagnetic enhancement that occurs in surface enhanced Raman scattering (SERS) substrates containing gold nanoparticles (NPs) is believed to arise through the generation of localised surface plasmons. We present results that show no SERS signals are obtained when 25 nm diameter gold NPs layered quartz substrates exposed to 2-aminopyridine are illuminated with plasmon resonant 532 nm radiation, but SERS signals are observed when the same samples are illuminated with non-resonant 785 nm radiation
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