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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
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 | ||||
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| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science > Chemistry Faculty of Science > Physics |
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| 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: |
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| 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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