Preparation a Conducting Polyaniline by Chemical Oxidative Method and Study Electrical Conductivity Properties

Samples of doped polyaniline (emeraldine salt) were prepared with protonic acid dopants, namely, hydrochloric acid (HCl). Using the two-point probe method, it was found that the samples had ohmic behavior in which high linear coefficients. The doped sample had a highest conductivity of 1.2x10-4S/cm was observed for the HCl doped sample, while the lowest value 7.59x10-6 S/cm. These conductivities were compared with the computed energy gap between the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) where it was found that they are inversely proportional to each other. Field scanning electron microscopy revealed significant differences among the samples in terms of morphology