Sensors & Transducers Journal
(ISSN 1726- 5479)
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205.767 |
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(ISSN 1726- 5479) |
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Vol. 137, Issue 2, February 2012, pp. 137-144
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Glass Surface Functionalized with Polyaniline as a Fast Responding Humidity Sensor
a H. M. P. C. K. HERATH, a E. K. C. PRADEEP, b M. K. JAYANANDA, b J. K. D. S. JAYANETTI, c V. KAPAKLIS, a,* D. P. DISSANAYAKE a Department of Chemistry, University of Colombo, Colombo 03, Sri Lanka, b Department of Physics, University of Colombo, Colombo 03, Sri Lanka c Division of Materials Physics, Department of Physics & Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden * Tel. 940112503367, fax. 940112503367 E-mail: dpd@chem.cmb.ac.lk
Received: 23 January 2012 /Accepted: 14 February 2012 /Published: 28 February 2012 |
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Abstract: Polyaniline functionalized glass surfaces display excellent sensitivity and fast response to humidity. Functionalized glass surfaces were generated by first exposing hot glass surfaces to SOCl2 and aniline monomers and then by chemical polymerization of aniline on the surface. After making electrical contacts using platinum wires, another layer of polyaniline covering the contacts was generated by electrochemical polymerization. The sensor thus made displayed fast and reproducible response to humidity.
Keywords: Polyaniline functionalized glass surface, Humidity, Sensor, FTIR of poly aniline exposed to humidity, Electron micrographs of functionalized glass surface
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