Tip-enhanced Raman spectroscopy reveals rich nanoscale adsorption chemistry of 2-mercaptopyridine on Ag

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Author(s) Zhang, Weihua, Schmid, Thomas, Yeo, Boon Siang, Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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Title Tip-enhanced Raman spectroscopy reveals rich nanoscale adsorption chemistry of 2-mercaptopyridine on Ag
Author(s) Zhang, Weihua
Schmid, Thomas
Yeo, Boon Siang
Zenobi, Renato
Journal or Series Title Israel journal of chemistry
Volume Number 47
Issue Number 2
Start Page 177
End Page 184
ISSN 0021-2148
1565-8187
Publisher Science from Israel
Publication Place Jerusalem
Publication Date 2007-00-00
Abstract Adsorption of 2-mercatopyridine (2MPy) on Ag surfaces was studied by tip-enhanced Raman spectroscopy (TERS), which allows the measurement of Raman spectra with nanometer scale spatial resolution on flat surfaces that themselves do not show any surface-enhancement Raman scattering (SERS) activity. We found that the adsorption behavior of 2MPy was affected by the parameters of the preparation for the adsorbate layers, i.e., Solution concentration, solution volume, and the exposure time. Besides that, variation of the TERS spectra at randomly chosen sample positions was observed. Only some of the bands appearing in SERS experiments showed up in each TERS measurement. We propose that this is caused by different local adsorption behavior of 2MPy on the Ag surfaces. This observation perfectly demonstrates the advantage of TERS over SERS, i.e., TERS call give localized chemical information on the nanometer scale, whereas SERS can only afford average spectra with micrometer scale resolution. Finally, TERS mapping with a spatial resolution of 24 nm was demonstrated.
Additional Notes Received 28 August 2006, Revised form 31 October 2006
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
Organisational Unit(s)
NEBIS System Number 000977823
Source Database ID PP-35194
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@article{Zhng2007,
  author = "Zhang, Weihua and Schmid, Thomas and Yeo, Boon Siang and Zenobi, Renato",
  title = "{T}ip-enhanced {R}aman spectroscopy reveals rich nanoscale adsorption chemistry of 2-mercaptopyridine on {A}g",
  journal = "Israel journal of chemistry",
  year = 2007,
  volume = "47",
  number = "2",
  pages = "177--184",
}


E-Citations record created: Thu, 01 Apr 2010, 19:14:40 CET