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Silver-decorated carbon nanotube networks as SERS substrates

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Chen, Yi-Chieh, Young, Robert J. (Robert Joseph), Macpherson, Julie V. and Wilson, Neil R. (2011) Silver-decorated carbon nanotube networks as SERS substrates. Journal of Raman Spectroscopy, Vol.42 (No.6). pp. 1255-1262. doi:10.1002/jrs.2862

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Official URL: http://dx.doi.org/10.1002/jrs.2862

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Abstract

We report on investigations upon a surface-enhanced Raman scattering (SERS) substrate produced from a two-dimensional single-walled carbon nanotube (SWNT) network decorated with Ag nanoparticles. Using the strong and unique Raman spectrum of SWNTs as a reference, the SWNT/Ag nanostructure can be considered to provide two regions: one with an ultrasensitive SERS response for single-molecule SERS (SMSERS) study; and another with uniform SERS enhancement over an area of several square millimeters for general SERS measurements. We report the appearance of an anomalous Raman feature at around 2180 cm(-1) in the high-sensitivity region which exhibits the characteristics of SMSERS. The SERS performance of the uniform area was characterized using pyridine vapor adsorbed onto the substrate. The presence of the SWNT/Ag nanostructure enhanced the Raman intensity by over seven orders of magnitude, a factor comparable to or exceeding that obtained on SERS substrates reported by other groups. The results indicate great potential to produce highly sensitive, uniform SERS substrates via further fine-tuning of the nanostructure.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Science > Chemistry
Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Nanotubes, Raman effect, Surface enhanced, Nanostructured materials, Electroforming
Journal or Publication Title: Journal of Raman Spectroscopy
Publisher: John Wiley & Sons Ltd.
ISSN: 03770486
Official Date: June 2011
Dates:
DateEvent
June 2011Published
Volume: Vol.42
Number: No.6
Page Range: pp. 1255-1262
DOI: 10.1002/jrs.2862
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

Data sourced from Thomson Reuters' Web of Knowledge

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