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Volatile organic gas recognition using conducting polymer sensor array
Lee, Kyung-Mun (Dept. of Mat. Sci. and Metallurgy, Kyungpook National University); Yu, Joon-Boo; Jun, Hee-Kwon; Lim, Jeong-Ok; Lee, Duk-Dong; Byun, Hyung-Gi; Huh, Jeung-Soo Source: Materials Science Forum, v 439, 2003, p 344-351
ISSN: 0255-5476 CODEN: MSFOEP
Conference: Eco - Materials Processing and Design, Feb 4-6 2003, Gyungpodae, South Korea
Publisher: Trans Tech Publications Ltd

Abstract: A gas recognition system was fabricated using a conducting polymer (polypyrrole and polyaniline) sensor array that can recognize and analyze various kinds and quantities of volatile organic compounds (VOCs), such as ethanol, toluene, benzene, and chloroform. The sensors also exhibited different sensitivity curves to VOCs according to the different additive amounts and kinds of conducting polymer (polypyrrole or polyaniline) and electrode. Polypyrrole and polyaniline film sensors made by chemical polymerization were employed to detect the VOCs. The multi-dimensional sensor signals obtained from the sensor array were then analyzed using the principal component analysis (PCA) technique and a radial basis function network (RBFN). By implementing the sensing signals from the sensor array along with a multi-layer neural network using an Radial-Basis Function learning algorithm, the sensor array was successful in accurately classifying the gas species and also identifying the concentration of each VOC in a real-time process. (14 refs.)

Ei controlled terms: Conductive plastics - Aromatic polymers - Chemical sensors - Volatile organic compounds - Ethanol - Toluene - Benzene - Chlorine compounds - Additives - Composition effects - Plastic films - Principal component analysis - Radial basis function networks

Uncontrolled terms: Sensor array - Volatile organic gas recognition - Additive amounts - Sensing signals

Classification Code: 817.1 Polymer Products - 708.2 Conducting Materials - 815.1.1 Organic Polymers - 804.1 Organic Compounds - 803 Chemical Agents and Basic Industrial Chemicals - 801.1 Chemistry, General

Database: Compendex