Preparation and Properties of Nanostructured PANI Thin Film and Its Application as Low Temperature NO2 Sensor

Present work reports the preparation, properties of polyaniline (PANI) thin film and its application as NO2 gas sensor opertable at room temperature. PANI was successfully synthesized via chemical oxidative polymerization technique using aniline as a monomer and ammonium persulphate (APS) as oxidant. PANI thin film sensor was fabricated on corning glass substrate using spin coating technique. The film was characterized by XRD, TEM, SEM, FTIR and UV-Visible. The PANI film was found to give maximum sensing response of similar to 12.10 towards 100 ppm NO2 gas having with fast response and recovery times as similar to 11 s and 7 min.