Conductive polymer‐carbon black composites‐based sensor arrays for use in an electronic nose
- 1 December 1999
- journal article
- Published by Emerald in Sensor Review
- Vol. 19 (4), 300-305
- https://doi.org/10.1108/02602289910294745
Abstract
Polymer‐carbon black composites are a new class of chemical detecting sensors used in electronic noses. These composites are prepared by mixing carbon black and polymer in an appropriate solvent. The mixture is deposited on a substrate between two metal electrodes, whereby the solvent evaporates leaving a composite film. Arrays of these chemiresistors, made from a chemically diverse number of polymers and carbon black, swell reversibly, inducing a resistance change on exposure to chemical vapors. These arrays generate a pattern that is a unique fingerprint for the vapor being detected. With the aid of algorithms these patterns are processed and recognized. These arrays can detect and discriminate between a large number of chemical vapors.Keywords
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