Title :
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
fDate :
Aug. 28 2011-Sept. 1 2011
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;
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
DOI :
10.1109/IQEC-CLEO.2011.6194001
