Electron Localization and Charge Transport in Poly(O-Toluidine): A ModelPolyaniline Derivative

摘要

The electron localization is increased with increasing one dimensionality of aquasi-one-dimensional disordered system (quasi-1D-DS). This concept is tested by studying the electron localization in the methyl ring-substituted derivative of polyaniline (PAN), poly(o-toluidine) (POT). The charging energy limited tunneling model for granular metals and the three-dimensional VRH model with a Coulomb gap are not consistent with the experiments. Other possible mechanisms for electron localization and the general implications for control of dimensionality and conductivity are discussed.