Preparation and Characterization of PAni Films by Electrochemical Polymerization


In this paper, a thin film of H2SO4 doped polyaniline (PAni) has been electrochemically polymerized on conducting indium tin oxide (ITO) substrate. Electrochemical synthesis was carried out by potentiostatic method at 0.7V. The structural and chemical characteristics of the prepared film were investigated by using x-ray photoelectron spectroscopy (XPS), scanning electron microscopy SEM, energy dispersive spectroscopy EDS, and Fourier transformation infrared spectroscopy FT-IR. The direct optical band gap of PAni was estimated from the optical properties and found to be 2.6 eV. The optical properties confirmed that the synthesized film has two broad absorption bands. The surface conductivity measurement was conducted with a four point probe.