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Vapor sensing with arrays of carbon black-polymer composites

Matzger, Adam and Vaid, Thomas P. and Lewis, Nathan S. (1999) Vapor sensing with arrays of carbon black-polymer composites. In: Detection and Remediation Technologies for Mines and Minelike Targets IV. Proceedings of SPIE. No.3710. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 315-320. ISBN 0819431842.

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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 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 used to classify vapors and vapor mixtures. This type of sensor array has been shown to resolve all organic vapors that have been analyzed, and can even resolve H_2O from D_2O. Blends of poly(vinyl acetate) and poly(methyl methacrylate) have been used to produce a series of sensor that response to vapors with a change in resistance of a magnitude that is not simply a linear combination of the responses of the pure polymers. These compatible blend composite detectors provided additional analyte discrimination information relative to a reference detector array that only contained composites formed using the pure polymer phases. Vapor signatures from chemicals used in land mine explosives, including TNT, DNT, and DNB, have been detected in air in short sampling time and discriminated from each other using these sensor arrays.

Item Type:Book Section
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Lewis, Nathan S.0000-0001-5245-0538
Additional Information:© 1999 Society of Photo-optical Instrumentation Engineers (SPIE). We acknowledge multi-university research initiative in demining from the Army Research Office and DARPA for support of this work.
Funding AgencyGrant Number
Army Research Office (ARO)UNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Series Name:Proceedings of SPIE
Issue or Number:3710
Record Number:CaltechAUTHORS:20180724-131523822
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Official Citation:Adam J. Matzger, Thomas P. Vaid, Nathan Saul Lewis, "Vapor sensing with arrays of carbon black-polymer composites", Proc. SPIE 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV, (2 August 1999); doi: 10.1117/12.357053;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88193
Deposited By: Tony Diaz
Deposited On:24 Jul 2018 20:47
Last Modified:16 Nov 2021 00:24

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