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Vapor sensor and materials therefor

  • US 7,138,090 B2
  • Filed: 04/11/2003
  • Issued: 11/21/2006
  • Est. Priority Date: 04/11/2003
  • Status: Expired due to Term
First Claim
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1. A conductometric sensor film comprising:

  • a crosslinked siloxane polymer comprising a monomer having an alkyl hydrocarbon side group with greater than or equal to two carbon atoms; and

    a plurality of conductive carbon black particles having a N2 adsorption of between about 8 to about 25 m2/g, distributed within said polymer, wherein the film exhibits a change in resistance when monomer interacts with one or more target analytes comprising one or more volatile organic hydrocarbon compounds.

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