Abstract
Polyaniline nanofibers of varying morphology were synthesized using two different chemical methods. The polyaniline samples were prepared through the oxidation of aniline in an ice bath. In the first method, the oxidant is added drop wise in aniline solution whereas in other the samples were prepared via rapid mixing of oxidant into aniline solution. The structural and morphological analysis of prepared samples was carried out using XRD, FTIR and FESEM techniques. The thick films of the synthesized powder were deposited on alumina substrate and their sensing response to various volatile gases was investigated at room temperature. The morphology of synthesized polyaniline powder depends upon method of synthesis and thus effect the sensing response and selectivity of the fabricated sensor.
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