An acoustically enhanced gold film Raman sensor on a lithium niobate substrate

Jaatinen, Esa A., Adams, Matthew P., Chou, Alison, McKay Parry, Nick, & Fredericks, Peter M. (2014) An acoustically enhanced gold film Raman sensor on a lithium niobate substrate. Journal of Raman Spectroscopy, 45(8), pp. 636-641.

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Abstract

The surface enhanced Raman scattering effect has shown immense potential for detecting trace amounts of explosive vapor molecules. To date, efforts to produce a commercially available, reliable SERS sensor have been impeded by an inability to separate the electromagnetic enhancement produced by the metallic nanostructure from other signal enhancing effects. Here, we show a new Raman sensor that uses surface acoustic waves (SAWs) to produce controllable surface structures on gold films deposited on LiNbO3 substrates that modulate the Raman signal of a target compound (thiophenol) adsorbed on the films. We demonstrate that this sensor can dynamically control the Raman signal simply by changing the SAW’s amplitude, allowing the Raman signal enhancement factor to be directly measured with no variation in the concentration of the target compound. The physically adsorbed molecules can be removed from the sensor without physical cleaning or damage, making it possible to reuse it for real-time Raman detection.

Impact and interest:

3 citations in Scopus
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2 citations in Web of Science®

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32 since deposited on 14 Aug 2014
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ID Code: 75016
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Raman scattering, SERS, surface acoustic waves, sensors
DOI: 10.1002/jrs.4522
ISSN: 1097-4555
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Funding:
Copyright Owner: Copyright 2014 John Wiley & Sons, Ltd.
Copyright Statement: This is the accepted version of the following article: Jaatinen E. A., Adams M. P., Chou A., McKay Parry N., and Fredericks P. M. (2014), An acoustically enhanced gold film Raman sensor on a lithium niobate substrate, J. Raman Spectrosc., 45, 636–641. doi: 10.1002/jrs.4522, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/jrs.4522/abstract
Deposited On: 14 Aug 2014 00:04
Last Modified: 03 Aug 2015 22:53

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