Detection of volatile organic compounds by surface enhanced Raman scattering

Allan S. P. Chang; Amitesh Maiti; Nazar Ileri; Mihail Bora; Cindy C. Larson; Jerald A. Britten; Tiziana C. Bond

doi:10.1117/12.920847

9 May 2012 Detection of volatile organic compounds by surface enhanced Raman scattering

Allan S. P. Chang, Amitesh Maiti, Nazar Ileri, Mihail Bora, Cindy C. Larson, Jerald A. Britten, Tiziana C. Bond

Proceedings Volume 8366, Advanced Environmental, Chemical, and Biological Sensing Technologies IX; 83660S (2012) https://doi.org/10.1117/12.920847
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

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.

Citation Download Citation

Allan S. P. Chang, Amitesh Maiti, Nazar Ileri, Mihail Bora, Cindy C. Larson, Jerald A. Britten, and Tiziana C. Bond "Detection of volatile organic compounds by surface enhanced Raman scattering", Proc. SPIE 8366, Advanced Environmental, Chemical, and Biological Sensing Technologies IX, 83660S (9 May 2012); https://doi.org/10.1117/12.920847

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