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.
Muñoz, B.C., Steinthal, G. and Sunshine, S. (1999), "Conductive polymer‐carbon black composites‐based sensor arrays for use in an electronic nose", Sensor Review, Vol. 19 No. 4, pp. 300-305. https://doi.org/10.1108/02602289910294745Download as .RIS
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