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Nanofibrous polyaniline thin film prepared by plasma‐induced polymerization technique for detection of NO 2 gas
Author(s) -
Tiwari Ashutosh,
Kumar Rajendra,
Prabaharan Mani,
Pandey Ravi R.,
Kumari Premlata,
Chaturvedi Anurag,
Mishra A. K.
Publication year - 2010
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1470
Subject(s) - materials science , polyaniline , thin film , scanning electron microscope , plasma polymerization , polymerization , fourier transform infrared spectroscopy , nanofiber , transmission electron microscopy , substrate (aquarium) , analytical chemistry (journal) , chemical engineering , nanotechnology , polymer , composite material , chromatography , oceanography , geology , engineering , chemistry
Abstract A nanofibrous polyaniline (PANI) thin film was fabricated using plasma‐induced polymerization method and explored its application in the fabrication of NO 2 gas sensor. The effects of substrate position, pressure, and the number of plasma pulses on the PANI film growth rate were monitored and an optimum condition for the PANI thin film preparation was established. The resulting PANI film was characterized with UV–visible spectrophotometer, FTIR, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The PANI thin film possessed nanofibers with a diameter ranging from 15 to 20 nm. The NO 2 gas sensing behavior was studied by measuring the change in electrical conductivity of PANI film with respect to NO 2 gas concentration and exposure time. The optimized sensor exhibited a sensitivity factor of 206 with a response time of 23 sec. The NO 2 gas sensor using nanofibrous PANI thin film as sensing probe showed a linear current response to the NO 2 gas concentration in the range of 10–100 ppm. Copyright © 2009 John Wiley & Sons, Ltd.