Array-based carbon black-polymer composite vapor detectors for detection of DNT in environments containing complex analyte mixtures
Abstract
Thin films of carbon black-organic polymer composites have been deposited across two metallic leads, with sorption of vapors producing swelling-induced resistance changes of the detector films. To identify and classify vapors, arrays of such vapor sensing elements have been constructed in which each element of the array contains a different polymer as the insulating phase and a common conductor, carbon black, as the conducting phase. The differing gas-solid partition coefficients for the various polymers of the detector array produce a pattern of differential resistance changes that is used to classify vapors and vapor mixtures. The performance of this detector array system towards 2,4-dinitrotoluene, the predominant signature in the vapor phase above land mines, in the presence high concentrations of water or of acetone has been evaluated.
Additional Information
© 2001 Society of Photo-Optical Instrumentation Engineers (SPIE). We acknowledge an OSD ARO MURI for demining, DOE, and an ARO olfactory research MURI for support of this work.Attached Files
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Additional details
- Eprint ID
- 88129
- Resolver ID
- CaltechAUTHORS:20180723-112800453
- Army Research Office (ARO)
- Department of Energy (DOE)
- Created
-
2018-07-23Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 4394