Array-based vapor sensing using chemically sensitive carbon black-polymer resistors
Abstract
We describe herein the construction of a simple, low-power, broadly responsive vapor sensor. Carbon black-organic polymer composites have been shown to swell reversibly upon exposure to vapors. Thin films of carbon black-organic polymer composites have been deposited across two metallic leads, with swelling-induced resistance changes of the films signaling the presence of vapors. To identify and classify vapors, arrays of such vapor-sensing elements have been constructed, with each element containing the same carbon black conducting phase but a different organic polymer as the insulating phase. The differing gas-solid partition coefficients for the various polymers of the sensor array produce a pattern of resistance changes that can be sued to classify vapors and vapor mixtures. This type of sensor array has been shown to resolve common organic solvents, including molecules of different classes as well as those within a particular class.
Additional Information
© 1997 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was supported in part by the Army Research Office MURI grant DAAH04-96-1-0048. Additional supporters include the Caltech Consortium in Chemistry and Chemical Engineering, the E.I. DuPont de Nemours and Company Inc., the Eastman Kodak Company, the National Aeronautics and Space Administration and the National Science Foundation grant CHE-9202583. M.C.L. acknowledges Caltech for an Arthur Amos Noyes Fellowship and B.J.D. acknowledges the Natural Science and Engineering Research Council of Canada for a 1967 Centennial Fellowship and the O'Brien Foundation for financial support.Attached Files
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Additional details
- Eprint ID
- 88136
- Resolver ID
- CaltechAUTHORS:20180723-125439537
- Army Research Office (ARO)
- DAAH04-96-1-0048
- Caltech Consortium in Chemistry and Chemical Engineering
- E. I. DuPont de Nemours and Company, Inc.
- Eastman Kodak Company
- NASA
- NSF
- CHE-9202583
- Arthur A. Noyes Fellowship
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- O'Brien Foundation
- Created
-
2018-07-23Created from EPrint's datestamp field
- Updated
-
2023-04-18Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 3079