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Materials Science Forum Vol.439 (2003), 344-351

Volatile organic gas recognition using conducting polymer sensor array

Authors: Kyung-Mun Lee, Joon-Boo Yu, Hee-Kwon Jun, Jeong-OK Lim, Duk-Dong Lee, Hyung-Gi Byun and Jeung-Soo Huh

Conductive polymer sensor measurements
Harris, P.D.  Andrews, M.K.  Partridge, A.C. 
Ind. Res. Ltd., Lower Hutt;


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原文由 quanbaogang 发表:
Conductive polymer sensor measurements
Harris, P.D.  Andrews, M.K.  Partridge, A.C. 
Ind. Res. Ltd., Lower Hutt;


This paper appears in: Solid State Sensors and Actuators, 1997. TRANSDUCERS '97 Chicago., 1997 International Conference on
Publication Date: 16-19 Jun 1997
Volume: 2,  On page(s): 1063-1066 vol.2
Meeting Date: 06/16/1997 - 06/19/1997
Location: Chicago, IL, USA
ISBN: 0-7803-3829-4
References Cited: 8
INSPEC Accession Number: 5766582
Digital Object Identifier: 10.1109/SENSOR.1997.635377
Posted online: 2002-08-06 21:09:48.0





Abstract
Conducting polymers have become popular as a means to sense odorous gasses, however the change in polymer resistance upon exposure to typical gas concentrations can be very small. Sensitivity is ultimately limited by the resistance measurement itself. We show that the passage of de current through the polymer generates high levels of excess noise, with a 1/f characteristic, which increases as approximately the square root of current. This behaviour is consistent with the granular structure of the material. We also demonstrate that the combination of low thermal mass of a typical polymer resistor and its thermal isolation makes it susceptible to self heating. Given typical temperature coefficients of resistance (e.g. -2%/°C for PPY/DS), measured resistances can be affected by ambient gas flow rates unless the measuring power is small. The use of ac techniques can provide significant S/N improvement at low measurement powers (voltages), where the resistance characteristic is most linear, enabling accurate resistance measurement in olfactory applications 

没办法，只能搞定这一个，都是会议论文吧，很难搞的，还是请高手出招吧！
Conductive polymer sensor measurements

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Materials Science Forum Vol.439 (2003), 344-351

Volatile organic gas recognition using conducting polymer sensor array

Authors: Kyung-Mun Lee, Joon-Boo Yu, Hee-Kwon Jun, Jeong-OK Lim, Duk-Dong Lee, Hyung-Gi Byun and Jeung-Soo Huh

仅找到摘要：
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