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Vol. 105, Issue 6, June 2009, pp.94-103





PPY-PVA Blend Thin Films as a Ammines Gas Sensor



*Department of Chemistry S. G. B. Amravati University Amravati, 444602 (M. S.), India

1Optoelectronics and Sensors Research laboratory, Department of Physics Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, 431004 (M.S.), India

E-mail: dharamdupare@yahoo.co.in, aswaranand@g-mail.com, mds_bamu@yahoo.co.in



Received: 6 April 2009   /Accepted: 22 June 2009   /Published: 30 June 2009


Abstract: Synthesis of polypyrrole–polyvinyl alcohol blend thin by in situ chemical oxidative polymerization, on glass substrate for development of Ammonia and Trimethyl ammine hazardous gas sensor. The all experimental process carried out at room temperature (304 k). These polymer materials were characterized by Chemical analyses, spectral studies (UV-visible and IR) and conductivity measurement by four –probe technique. The surface morphology as seen in the SEM image was observed to be granular, tubular, uniformly covering the entire substrate surface having porous in nature. The current–voltage characterization show that these thin films have conducting in nature having ohmic behaviors. The sensor was used for different concentration (ppm) of TMA and Ammonia gas investigation at room temperature (304 k). This study found to possess improved electrical, mechanical and environmental stability PPY-PVA films.


Keywords: Polymer blend, Thin film, Conducting polymer, Ammonia, TMA-Gas sensor, Polypyrrole, Polyvinyl alcohol


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