Sponsor
This research is supported by financial aids from National Science Council, Taiwan under Grant Nos. NSC 100-2923- M-002-007-MY3, NSC 101-3113-P-002-021, and NSC 101- 2112-M-002-023.
Published In
The Journal of Chemical Physics
Document Type
Article
Publication Date
6-2013
Subjects
Raman effect -- Effect of electric discharges on, Nanoparticles, Surface enhanced Raman effect, Surfaces (Physics)
Abstract
Motivating by recent experiments on surface enhanced Raman scattering (SERS) from colloidal solutions, we present here a simple model to elucidate the effects of extraneous surface charges on the enhanced Raman signal. The model is based on the well-established Gersten-Nitzan model coupled to the modified Mie scattering theory of Bohren and Hunt in the long wavelength approximation. We further introduce corrections from the modified long wavelength approximation to the Gersten-Nitzan model for the improvement of its accuracy. Our results show that the surface charge will generally lead to a blueshift in the resonance frequency and greater enhancements in the SERS spectrum. Possible correlations with the recent experiments are elaborated.
DOI
10.1063/1.4809524
Persistent Identifier
https://archives.pdx.edu/ds/psu/26726
Citation Details
H. Y. Chung, P. T. Leung, and D. P. Tsai, 2013 " Effects of extraneous surface charges on the enhanced Raman scattering from metallic nanoparticles " J. Chem. Phys. 138: 224101.
Description
This is the publisher's final pdf. Article appears in The Journal of Chemical Physics and is copyrighted 2013 by the American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. Article is available online: https://doi.org/10.1063/1.4809524