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Surface enhanced Raman scattering of pyridine adsorbed on Au@Pd core/shell nanoparticles

Yang, Zhilin; Li, Yan; Li, Zhipeng; Wu, Deyin; Kang, Junyong; Xu, Hongxing LU and Sun, Mengtao (2009) In Journal of Chemical Physics 130(23).
Abstract
Surface enhanced Raman scattering (SERS) of pyridine adsorbed on Au@Pd core/shell nanoparticles has been investigated theoretically with quantum chemical method, generalized Mie theory and three-dimensional finite-difference time domain (3D-FDTD) method. We first studied the influence of the coated Pd on the electronic structure of Au nanoparticle, and compared the electronic structure of Au-20 cluster with that of Au10Pd10 (core/shell) cluster. Second, we studied SERS spectroscopy of pyridine on Au@Pd core/shell nanoparticles, which revealed the rate of static chemical enhancement and electromagnetic enhancement in the experimental reports. Third, the influence of the Pd shell thickness to the optical absorption of Au@Pd core/shell... (More)
Surface enhanced Raman scattering (SERS) of pyridine adsorbed on Au@Pd core/shell nanoparticles has been investigated theoretically with quantum chemical method, generalized Mie theory and three-dimensional finite-difference time domain (3D-FDTD) method. We first studied the influence of the coated Pd on the electronic structure of Au nanoparticle, and compared the electronic structure of Au-20 cluster with that of Au10Pd10 (core/shell) cluster. Second, we studied SERS spectroscopy of pyridine on Au@Pd core/shell nanoparticles, which revealed the rate of static chemical enhancement and electromagnetic enhancement in the experimental reports. Third, the influence of the Pd shell thickness to the optical absorption of Au@Pd core/shell nanoparticles was investigated with generalized Mie theory. Fourth, we studied the influence of the shell thickness to the local electric field enhancement with 3D-FDTD method. The theoretical results reveal that the static chemical enhancement and electromagnetic enhancement are in the order of 10 and 10(3), respectively. These theoretical studies promote the deeper understanding of the electronic structure and optical absorption properties of Au@Pd, and the mechanisms for SERS of molecule adsorbed on Au@Pd. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
electromagnetic wave scattering, electronic structure, finite difference time-domain analysis, nanoparticles, gold, compounds, organic, surface enhanced Raman scattering, palladium, adsorption
in
Journal of Chemical Physics
volume
130
issue
23
publisher
American Institute of Physics
external identifiers
  • wos:000267166200049
  • scopus:67649135919
ISSN
0021-9606
DOI
10.1063/1.3153917
language
English
LU publication?
yes
id
0dcb13c6-9822-45dc-af47-aeb8a6dc8453 (old id 1441325)
date added to LUP
2009-07-28 10:19:59
date last changed
2017-11-12 03:25:45
@article{0dcb13c6-9822-45dc-af47-aeb8a6dc8453,
  abstract     = {Surface enhanced Raman scattering (SERS) of pyridine adsorbed on Au@Pd core/shell nanoparticles has been investigated theoretically with quantum chemical method, generalized Mie theory and three-dimensional finite-difference time domain (3D-FDTD) method. We first studied the influence of the coated Pd on the electronic structure of Au nanoparticle, and compared the electronic structure of Au-20 cluster with that of Au10Pd10 (core/shell) cluster. Second, we studied SERS spectroscopy of pyridine on Au@Pd core/shell nanoparticles, which revealed the rate of static chemical enhancement and electromagnetic enhancement in the experimental reports. Third, the influence of the Pd shell thickness to the optical absorption of Au@Pd core/shell nanoparticles was investigated with generalized Mie theory. Fourth, we studied the influence of the shell thickness to the local electric field enhancement with 3D-FDTD method. The theoretical results reveal that the static chemical enhancement and electromagnetic enhancement are in the order of 10 and 10(3), respectively. These theoretical studies promote the deeper understanding of the electronic structure and optical absorption properties of Au@Pd, and the mechanisms for SERS of molecule adsorbed on Au@Pd.},
  articleno    = {234705},
  author       = {Yang, Zhilin and Li, Yan and Li, Zhipeng and Wu, Deyin and Kang, Junyong and Xu, Hongxing and Sun, Mengtao},
  issn         = {0021-9606},
  keyword      = {electromagnetic wave scattering,electronic structure,finite difference time-domain analysis,nanoparticles,gold,compounds,organic,surface enhanced Raman scattering,palladium,adsorption},
  language     = {eng},
  number       = {23},
  publisher    = {American Institute of Physics},
  series       = {Journal of Chemical Physics},
  title        = {Surface enhanced Raman scattering of pyridine adsorbed on Au@Pd core/shell nanoparticles},
  url          = {http://dx.doi.org/10.1063/1.3153917},
  volume       = {130},
  year         = {2009},
}