Array based carbon black-polymer composite vapor detectors for detection of DNT in environments containing complex analyte mixtures

Shawn M. Briglin, Michael S. Freund, Brian C. Sisk, Nathan S. Lewis

Research output: Contribution to journalConference articlepeer-review

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 (as a selected volatile organic carbon vapor), has been evaluated.

Original languageEnglish
Pages (from-to)912-921
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4394
Issue number2
DOIs
Publication statusPublished - 2001
EventDetection and Remediation Technologies for Mines and Minelike Targets VI - Orlando, FL, United States
Duration: Apr 16 2001Apr 20 2001

Keywords

  • 2,4-dinitrotoluene
  • Carbon black
  • Land mine signatures
  • Vapor detectors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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