Chemical and electromagnetic mechanisms of tip-enhanced Raman scattering
(2009) In Physical Chemistry Chemical Physics 11(41). p.9412-9419- Abstract
- In this paper, we attempt to reveal the nature of the chemical and electromagnetic mechanisms of tip-enhanced Raman scattering (TERS). Direct visual evidence regarding the chemical mechanism via charge transfer was obtained with charge difference density. It is found that there are several kinds of charge transfer: (1) tip to molecule, (2) surface to molecule, (3) tip and surface to molecule simultaneously, and (4) tunneling charge transfer between the tip and the surface. Direct evidence regarding the electromagnetic mechanism via intracluster (tip or surface) charge redistribution was also revealed via charge difference density. The distance (between tip and surface) dependence of the near electric field distribution and the TERS... (More)
- In this paper, we attempt to reveal the nature of the chemical and electromagnetic mechanisms of tip-enhanced Raman scattering (TERS). Direct visual evidence regarding the chemical mechanism via charge transfer was obtained with charge difference density. It is found that there are several kinds of charge transfer: (1) tip to molecule, (2) surface to molecule, (3) tip and surface to molecule simultaneously, and (4) tunneling charge transfer between the tip and the surface. Direct evidence regarding the electromagnetic mechanism via intracluster (tip or surface) charge redistribution was also revealed via charge difference density. The distance (between tip and surface) dependence of the near electric field distribution and the TERS enhancement at different incident lights is also discussed using the three-dimensional finite-difference time-domain (FDTD) method. The electromagnetic enhancement of double-tip TERS is approximately 10 times larger than that of conventional TERS. Theoretical results reveal that plasmon coupling effects between the metal tip and surface play an important role in TERS. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1505979
- author
- Sun, Mengtao ; Fang, Yurui ; Yang, Zhilin and Xu, Hongxing LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Chemistry Chemical Physics
- volume
- 11
- issue
- 41
- pages
- 9412 - 9419
- publisher
- Royal Society of Chemistry
- external identifiers
-
- wos:000270795500013
- scopus:70350044879
- pmid:19830324
- ISSN
- 1463-9084
- DOI
- 10.1039/b909006a
- language
- English
- LU publication?
- yes
- id
- 4bc0ebef-9f84-4d8e-b7b4-9edff4977161 (old id 1505979)
- date added to LUP
- 2016-04-01 13:10:03
- date last changed
- 2022-04-21 20:07:39
@article{4bc0ebef-9f84-4d8e-b7b4-9edff4977161,
abstract = {{In this paper, we attempt to reveal the nature of the chemical and electromagnetic mechanisms of tip-enhanced Raman scattering (TERS). Direct visual evidence regarding the chemical mechanism via charge transfer was obtained with charge difference density. It is found that there are several kinds of charge transfer: (1) tip to molecule, (2) surface to molecule, (3) tip and surface to molecule simultaneously, and (4) tunneling charge transfer between the tip and the surface. Direct evidence regarding the electromagnetic mechanism via intracluster (tip or surface) charge redistribution was also revealed via charge difference density. The distance (between tip and surface) dependence of the near electric field distribution and the TERS enhancement at different incident lights is also discussed using the three-dimensional finite-difference time-domain (FDTD) method. The electromagnetic enhancement of double-tip TERS is approximately 10 times larger than that of conventional TERS. Theoretical results reveal that plasmon coupling effects between the metal tip and surface play an important role in TERS.}},
author = {{Sun, Mengtao and Fang, Yurui and Yang, Zhilin and Xu, Hongxing}},
issn = {{1463-9084}},
language = {{eng}},
number = {{41}},
pages = {{9412--9419}},
publisher = {{Royal Society of Chemistry}},
series = {{Physical Chemistry Chemical Physics}},
title = {{Chemical and electromagnetic mechanisms of tip-enhanced Raman scattering}},
url = {{http://dx.doi.org/10.1039/b909006a}},
doi = {{10.1039/b909006a}},
volume = {{11}},
year = {{2009}},
}