HCl-doping of insulated molecular wire formed by emeraldine base polyaniline and molecular nanotube

We have reported the formation and property of an insulated molecular wire formed by emeraldine base polyaniline (EB-PANI) and molecular nanotube. In this study, the insulated molecular wire was doped by HCl solution. The doping induced the broad absorption band around 800 nm and higher wavelength due to the polaron formation. When a solution of the insulated molecular wire was dropped and dried out on a mica substrate, the number of the insulated molecular wires attached to the mica surface was increased by the doping. This suggested that the HCl-doped cationic insulated molecular wire was strongly attached to the anionic mica surface than the non-doped insulated molecular wire. Consequently, the insulated molecular wire could be doped by HCl solution without dissociation.