Abstract

V. B. Patil¹*, S.G. Pawar¹, S. L. Patil¹ and A. K. Sood²

Films of polyaniline (EB) doped with camphor sulfonic acid (CSA) from m-cresol on glass substrates exhibit considerable metallic properties. Such polymer metallic films have thermal sensitivity superior to ceramic metal (Cermet) films, prepared by metallo organic deposition (MOD) technique on silicon substrates. These PANI (EB)-CSA polymer films prepared by oxidation polymerization with doping levels in the range of 10-90%. The electrical conductivity of these films has been measured as a function of temperature between 10 and 300 K. At a doping level of 20% the onset of metallic transport is observed, and at 60% the films are found to exhibit metallic transport down to 135 K, and have a maximum room-temperature conductivity of 200 ± 20 S cm-1. The results are modeled in terms of a heterogeneous model of fluctuation induced tunneling (FIT) and metallic transport. This paper deals with these superior thermal properties together with optical studies and surface morphology by scanning electron microscopy (SEM).

Polyaniline; CSA; SEM; optical properties and electrical properties

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