A chemically diverse conducting polymer-based "electronic nose"

Creators: Freund, Michael S.; Lewis, Nathan S.

Abstract

We describe a method for generating a variety of chemically diverse broadly responsive low-power vapor sensors. The chemical polymerization of pyrrole in the presence of plasticizers has yielded conducting organic polymer films whose resistivities are sensitive to the identity and concentration of various vapors in air. An array of such sensing elements produced a chemically reversible diagnostic pattern of electrical resistance changes upon exposure to different odorants. Principal component analysis has demonstrated that such sensors can identify and quantify different airborne organic solvents and can yield information on the components of gas mixtures.

Additional Information

© 1995 National Academy of Sciences. Communicated by Robert H. Grubbs, California Institute of Technology, Pasadena, CA, November 28, 1994. We thank Profs. J. J. Hopfield and J. M. Bower, and the members of their research groups, for helpful discussions. This work was supported in part by the Caltech Consortium in Chemistry and Chemical Engineering; E. I. DuPont de Nemours and Company, Inc., the Eastman Kodak Company, National Aeronautics and Space Administration, and National Science Foundation Grant CHE-9202583. This is contribution no. 8952. The publication costs of this article were defrayed in part by page charge payment. This article must therefore be hereby marked "advertisement" in accordance with 18 U.S.C. §1734 solely to indicate this fact.

Attached Files

Published - PNAS-1995-Freund-2652-6.pdf

Files

PNAS-1995-Freund-2652-6.pdf

Files (1.4 MB)

Name	Size	Download all
PNAS-1995-Freund-2652-6.pdf md5:a501553ee14899c8e2b6a72bf4ab551a	1.4 MB	Preview Download

Additional details

	All versions	This version
Views	0	0
Downloads	0	0
Data volume	0 Bytes	0 Bytes