Please use this identifier to cite or link to this item:
Title: Investigation into a surface plasmon related heating effect in surface enhanced Raman spectroscopy
Authors: Kiang, W.K.
Ze, X.S.
Lei, Z.
Watt, F. 
Khee, C.S.
Olivo, M.
Issue Date: 1-Dec-2007
Citation: Kiang, W.K., Ze, X.S., Lei, Z., Watt, F., Khee, C.S., Olivo, M. (2007-12-01). Investigation into a surface plasmon related heating effect in surface enhanced Raman spectroscopy. Analytical Chemistry 79 (23) : 8870-8882. ScholarBank@NUS Repository.
Abstract: The irreversible loss of surface enhanced Raman spectroscopy (SERS) intensity derived from electrostatically immobilized Au colloidal substrate is studied. The total intensity of the SERS scattering from crystal violet molecules adsorbed onto the substrate was monitored for up to 240 s under continuous laser irradiation. The rate of signal decay was found to depend upon the thickness of the liquid layer over the coated substrate. On the basis of this observation, we propose a plausible mechanism in which surface plasmon related heating induced a small but significant lateral particle diffusion in closely spaced Au particles. The result of the shifting is an increase in the average interparticle distance, which subsequently reduces the electromagnetic coupling between the Au nanoparticles, and in turn causes a reduction in the SERS activity. Finally, a three-state model is proposed and shown to satisfactorily describe the observed decays. © 2007 American Chemical Society.
Source Title: Analytical Chemistry
ISSN: 00032700
DOI: 10.1021/ac070497w
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Jan 14, 2019


checked on Jan 14, 2019

Page view(s)

checked on Aug 17, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.