Progress in use of carbon-black-polymer composite vapor detector arrays for land mine detection
Abstract
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. Each element contained a different organic polymer as the insulating phase. The differing gas-solid partition coefficients for the various polymers of the detector array produced a pattern of resistance changes that was used to classify vapors and vapor mixtures. The performance of this system towards DNT, the predominant signature in the vapor phase above land miens, has been evaluated in detail, with robust detection demonstrated in the laboratory in less than 5 s in air at DNT levels in the low ppb range.
Additional Information
© 2000 Society of Photo-Optical Instrumentation Engineers (SPIE). We acknowledge an OSD ARO MURI for demining, and DARPA, for support of this work.Attached Files
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Additional details
- Eprint ID
- 88107
- Resolver ID
- CaltechAUTHORS:20180720-162850664
- Army Research Office (ARO)
- Defense Advanced Research Projects Agency (DARPA)
- 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
- 4038