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Proceedings Paper

Detection of volatile organic compounds by surface enhanced Raman scattering
Author(s): Allan S. P. Chang; Amitesh Maiti; Nazar Ileri; Mihail Bora; Cindy C. Larson; Jerald A. Britten; Tiziana C. Bond
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Paper Abstract

We present the detection of volatile organic compounds directly in their vapor phase by surface-enhanced Raman scattering (SERS) substrates based on lithographically-defined two-dimensional rectangular array of nanopillars. The type of nanopillars is known as the tapered pillars. For the tapered pillars, SERS enhancement arises from the nanofocusing effect due to the sharp tip on top. SERS experiments were carried out on these substrates using various concentrations of toluene vapor. The results show that SERS signal from a toluene vapor is strongly influenced by the substrate temperature, and the toluene vapor can be detected within minutes of exposing the SERS substrate to the vapor. A simple adsorption model is developed which gives results matching the experimental data. The results also show promising potential for the use of these substrates in environmental monitoring of gases and vapors.

Paper Details

Date Published: 9 May 2012
PDF: 8 pages
Proc. SPIE 8366, Advanced Environmental, Chemical, and Biological Sensing Technologies IX, 83660S (9 May 2012); doi: 10.1117/12.920847
Show Author Affiliations
Allan S. P. Chang, Lawrence Livermore National Lab. (United States)
Amitesh Maiti, Lawrence Livermore National Lab. (United States)
Nazar Ileri, Lawrence Livermore National Lab. (United States)
Mihail Bora, Lawrence Livermore National Lab. (United States)
Cindy C. Larson, Lawrence Livermore National Lab. (United States)
Jerald A. Britten, Lawrence Livermore National Lab. (United States)
Tiziana C. Bond, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 8366:
Advanced Environmental, Chemical, and Biological Sensing Technologies IX
Tuan Vo-Dinh; Robert A. Lieberman; Günter Gauglitz, Editor(s)

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