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Direct visual evidence for the chemical mechanism of surface-enhanced resonance Raman scattering via charge transfer

Sun, Mengtao LU ; Liu, Shasha; Chen, Maodu and Xu, Hongxing LU (2009) In Journal of Raman Spectroscopy 40(2). p.137-143
Abstract
We describe the chemical and electromagnetic enhancements of surface-enhanced resonance Raman scattering (SERRS) for the pyridine molecule absorbed on silver clusters, in which different incident wavelength regions are dominated by different enhancement mechanisms. Through visualization we theoretically investigate the charge transfer (CT) between the molecule and the metal cluster, and the charge redistribution (CR) within the metal on the electronic intracluster collective oscillation excitation (EICOE). The CT between the metal and the molecule in the molecule-metal complex is considered as an evidence for chemical enhancement to SERRS. CR within the metal on EICOE is considered as an evidence for the electromagnetic enhancement by... (More)
We describe the chemical and electromagnetic enhancements of surface-enhanced resonance Raman scattering (SERRS) for the pyridine molecule absorbed on silver clusters, in which different incident wavelength regions are dominated by different enhancement mechanisms. Through visualization we theoretically investigate the charge transfer (CT) between the molecule and the metal cluster, and the charge redistribution (CR) within the metal on the electronic intracluster collective oscillation excitation (EICOE). The CT between the metal and the molecule in the molecule-metal complex is considered as an evidence for chemical enhancement to SERRS. CR within the metal on EICOE is considered as an evidence for the electromagnetic enhancement by collective plasmons. For the incident wavelength from 300 to 1000 nm, the visualized method of charge difference density can classify the different wavelength regions for chemical and electromagnetic enhancement, which are consistent with the formal fragmented experimental studies. Copyright (C) 2008 John Wiley & Sons, Ltd. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
intracluster charge redistribution, density, charge difference, charge transfer, SERRS, chemical enhancement
in
Journal of Raman Spectroscopy
volume
40
issue
2
pages
137 - 143
publisher
John Wiley & Sons
external identifiers
  • wos:000263981000006
  • scopus:60249090942
ISSN
1097-4555
DOI
10.1002/jrs.2093
language
English
LU publication?
yes
id
5b12bc72-41a7-46c5-bc88-b39453439080 (old id 1404667)
date added to LUP
2009-06-12 12:41:50
date last changed
2017-11-26 03:38:08
@article{5b12bc72-41a7-46c5-bc88-b39453439080,
  abstract     = {We describe the chemical and electromagnetic enhancements of surface-enhanced resonance Raman scattering (SERRS) for the pyridine molecule absorbed on silver clusters, in which different incident wavelength regions are dominated by different enhancement mechanisms. Through visualization we theoretically investigate the charge transfer (CT) between the molecule and the metal cluster, and the charge redistribution (CR) within the metal on the electronic intracluster collective oscillation excitation (EICOE). The CT between the metal and the molecule in the molecule-metal complex is considered as an evidence for chemical enhancement to SERRS. CR within the metal on EICOE is considered as an evidence for the electromagnetic enhancement by collective plasmons. For the incident wavelength from 300 to 1000 nm, the visualized method of charge difference density can classify the different wavelength regions for chemical and electromagnetic enhancement, which are consistent with the formal fragmented experimental studies. Copyright (C) 2008 John Wiley & Sons, Ltd.},
  author       = {Sun, Mengtao and Liu, Shasha and Chen, Maodu and Xu, Hongxing},
  issn         = {1097-4555},
  keyword      = {intracluster charge redistribution,density,charge difference,charge transfer,SERRS,chemical enhancement},
  language     = {eng},
  number       = {2},
  pages        = {137--143},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Raman Spectroscopy},
  title        = {Direct visual evidence for the chemical mechanism of surface-enhanced resonance Raman scattering via charge transfer},
  url          = {http://dx.doi.org/10.1002/jrs.2093},
  volume       = {40},
  year         = {2009},
}