Electrogeneration and characterization of poly(3-methylthiophene)

Results for a conducting polymer poly(3-methylthiophene) are presented with demonstration that the electrochemical deposition proceeds favourably through 3D instantaneous nucleation and growth. The polymer film is insulating at sufficiently negative 0.1V or positive 1.6V electrochemical potentials in propylene carbonate + LiClO4 solution. When the solution was H2SO4 the film was insulating in 0.5 V or 1.1 V. The macrogrowth occurred in three dimensions and showed disordered rough structures. According to the results for t < 1 s the fractal dimension D-5 = 2.5 was obtained and for t > 1 s this parameter was 2.0. The band gap energy of these material is approximate to1 eV characteristic for the polymer materials in oxidized state. This films have a lot of free charge carriers and this characteristic confers conductive properties to the material.