Enhanced electrical conductivity of polyaniline film by a low magnetic field

We report the enhanced electrical conductivity of polyaniline (PANI) films produced in a low magnetic field using polyaniline that was synthesized by a self-stabilized dispersion polymerization (SSDP). The sample PANI film prepared with a low magnetic field of 1.4 T showed a 1.85-fold increase in electrical conductivity. Moreover, the film using the polyaniline prepared using the SSDP method showed greater conductivity enhancement than the conventionally prepared sample. In addition, the PANI films exhibited considerable anisotropy of the electrical conductivity depending on the direction of the applied magnetic field. This was attributed to the non-negligible contribution of the orientation of the polyaniline backbone segment and the face-to-face π–π stacking of the main-chains by the magnetic field.