Are plasmons responsible for the Raman signal enhancement observed with gold nanoparticle sensors?

Author

Chou, Alison ; Jaatinen, Esa ; Fredericks, Peter

Author_Institution

Chem. Discipline, QUT, Brisbane, QLD, Australia

fYear

2011

fDate

Aug. 28 2011-Sept. 1 2011

Firstpage

396

Lastpage

398

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 localized 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 nonresonant 785 nm radiation.

Keywords

gold; nanoparticles; nanophotonics; nanosensors; optical sensors; surface enhanced Raman scattering; surface plasmon resonance; 2-aminopyridine; Au; Raman signal enhancement; SERS substrates; SiO₂; electromagnetic enhancement; gold nanoparticle sensors; layered quartz substrates; localized surface plasmons; nonresonant radiation; plasmon resonant radiation; size 25 nm; surface enhanced Raman scattering; wavelength 532 nm; wavelength 785 nm; Gold; Nanoparticles; Optical surface waves; Plasmons; Raman scattering; Substrates; Surface treatment;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum Electronics Conference & Lasers and Electro-Optics (CLEO/IQEC/PACIFIC RIM), 2011

Conference_Location

Sydney, NSW

Print_ISBN

978-1-4577-1939-4

Type

conf

DOI

10.1109/IQEC-CLEO.2011.6194001

Filename

6194001