Abstract
The effect of monomer concentration, surface resistance of electrode (SnO 2:F coated transparent glass) and current strength on the optical and thermal properties of galvanostatically deposited poly( o-anisidine) films was investigated. Of the three parameters, the monomer concentration was found to affect the film properties markedly. The optical spectra showed that a higher selectivity in obtaining the conducting emeraldine phase can be achieved by the proper combination of surface resistance of electrode and current strength, especially at low concentration. Thermogravimetric analysis revealed a positive shift in the final decomposition temperature with increasing monomer concentration, thereby suggesting that a lower monomer concentration is suitable for the formation of the emeraldine salt form of the polymer. The scanning electron micrographs show that the films exhibit a fibrillar morphology; the density as well as the length of the fibres seem to increase with the monomer concentration.
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