Enhancement of Raman signals with silver-coated tips

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Author(s) Yeo, Boon-Siang, Zhang, Weihua, Vannier, Christophe, Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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Title Enhancement of Raman signals with silver-coated tips
Author(s) Yeo, Boon-Siang
Zhang, Weihua
Vannier, Christophe
Zenobi, Renato
Journal or Series Title Applied spectroscopy
Volume Number 60
Issue Number 10
Start Page 1142
End Page 1147
ISSN 0003-7028
Publisher Society for Applied Spectroscopy
Publication Place Frederick, MD
Publication Date 2006
Keyword(s) nanoscale chemical analysis
surface-enhanced Raman spectroscopy
tip-enhanced Raman spectroscopy
vapor deposition
Abstract Silver coated SiN and SiO2 tips have been fabricated for use with a bottom-illumination tip-enhanced Raman spectroscopy (TERS) setup with a 488 nm laser excitation. SiN tips with 50-60 nm of deposited Ag give the best TERS enhancements for brilliant cresyl blue test analyte spin-coated on a glass slide. Ag nanoparticles on SiN or SiO2 rather than Si tips are better for TERS because of the proximity of the wavelengths of their surface plasmon resonance to 488 run. Adjustments of tilt angle of the metallized tip with respect to the surface plane is shown to considerably raise the intensities of the TERS signals, even from tips that initially appear to be rather non-enhancing. This work helps to enable the more frequent use of the 488 nm laser for nanoscale chemical analysis with both TERS and fluorescence imaging in the same setup.
DOI 10.1366/000370206778664662
Additional Notes Received 28 April 2006, Accepted 26 June 2006
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
Organisational Unit(s)
NEBIS System Number 000031958
Source Database ID PP-24965
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  author = "Yeo, Boon-Siang and Zhang, Weihua and Vannier, Christophe and Zenobi, Renato",
  title = "{E}nhancement of {R}aman signals with silver-coated tips",
  journal = "Applied spectroscopy",
  year = 2006,
  volume = "60",
  number = "10",
  pages = "1142--1147",

E-Citations record created: Thu, 01 Apr 2010, 16:15:04 CET