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Proceedings Paper

Selective detection of hydrocarbon vapors by ATR-leaky mode spectroscopy
Author(s): R. P. Podgorsek; Hilmar Franke; John G. Woods; Roger A. Lessard
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Paper Abstract

The technique of dynamic ATR-leaky mode spectroscopy is demonstrated for polymer films on 50 nm Ag layers. For the vapor series R OH with R equals H,CH3, C2 H5 and the BTX compounds benzene, toluene and the 3 xylene isomers two different ways of obtaining selective sensor detection are described. The first approach uses the specific sensitivity. Each vapor has a specific molecular polarizability which causes a specific sensitivity. The second approach takes advantage of the dynamic method. The specific diffusion of the particular molecule in the polymer matrix can be evaluated. In this context the characteristic diffusion of the 3 isomers of xylene are investigated.

Paper Details

Date Published: 15 March 2000
PDF: 9 pages
Proc. SPIE 3912, Micro- and Nanotechnology for Biomedical and Environmental Applications, (15 March 2000); doi: 10.1117/12.379576
Show Author Affiliations
R. P. Podgorsek, Univ. Duisburg (Germany)
Hilmar Franke, Univ. Duisburg (Germany)
John G. Woods, Loctite Corp. (United States)
Roger A. Lessard, COPL/Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 3912:
Micro- and Nanotechnology for Biomedical and Environmental Applications
Raymond P. Mariella Jr., Editor(s)

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