Electrical and Optical Response of a Conducting Polymer Gas Sensor
This work deals with the electrical and optical response of poly (o-methoxyaniline) (POMA) thin films exposed to nitrogen and nitrogen with methanol. A low cost apparatus was developed for the optical assessment of the presence of methanol in an ambient. It is shown that thick POMA films exhibits a...
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Published in | ECS transactions Vol. 14; no. 1; pp. 21 - 26 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
22.08.2008
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Online Access | Get full text |
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Summary: | This work deals with the electrical and optical response of poly (o-methoxyaniline) (POMA) thin films exposed to nitrogen and nitrogen with methanol. A low cost apparatus was developed for the optical assessment of the presence of methanol in an ambient. It is shown that thick POMA films exhibits a wide optical absorption variation when in presence of methanol. It was observed that the optical absorption characteristics return to the initial condition when methanol exposition ceases. Electrical response of a photoresistor to methanol showed larger relative variations but also presented large noise interference. A residual drift in the resistance is presented after every cycle and it need to be better evaluated. |
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ISSN: | 1938-5862 1938-6737 |
DOI: | 10.1149/1.2956013 |