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Ion Beam Modified Conducting Polymer Composites: Material for Gas Sensing

Published online by Cambridge University Press:  01 February 2011

Virendra Singh
Affiliation:
virendra.chem@gmail.com, Panjab University, Deaprtment of Chemistry, Sector-14, Chandigarh, N/A, N/A, India
Manindar Kaur
Affiliation:
mindy.chem@gmail.com, Panjab University, Chemisty, India
Tejvir Singh
Affiliation:
tvs_chem@lycos.com, Panjab University, Chemisty, India
Amita Chandra
Affiliation:
amitach1@pu.acin, Panjab University, Physics, India
Alok Srivastava
Affiliation:
alokamla@hotmail.com, Panjab University, Chemisty, India
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Abstract

A polyaniline based conducting composite was prepared by oxidative polymerisation of aniline in presence of polyvinylchloride (PVC) matrix. The coherent free standing thin films of the composite were prepared by solution casting method. The PVC-polyaniline composite (90:10) of thickness 40 μm was irradiated with 90 MeV C5+ ions at different ion fluence ranging 5× 1011-5× 1013 ions/cm2. The changes in resistance of pristine and irradiated composite in presence of ammonia gas were studied. A general decrease in surface resistance is observed upon irradiation. The sensitivity, response time and recovery time were studied as a function of ion fluence on exposing the sensor material to ammonia gas at ambient condition. It is observed that irradiated composite films are more sensitive and fast in response to ammonia gas. The preliminary results observed are encouraging.

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Type
Research Article
Copyright
Copyright © Materials Research Society 2006

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