Fe2(SO4)3 as a Binary Oxidant and Dopant to Thin Polyaniline Nanowires with High Conductivity

摘要

This article exposes a facial approach to self-assemble polyaniline (PANI) nanowires with thin diameter (~10 nm) and high room-temperature conductivity (~10~0 S/cm) by using Fe2(SO4)3 as a binary oxidant and dopant. The new method not only saves hard templates and postprocess of template removal but also simplifies the reagent. Formation yield, diameter, and room-temperature conductivity of the nanowires are affected by the molar ratios of Fe2(SO4)3 to aniline. The low redox potential of Fe2(SO4)3 not only results in a thinner diameter and higher room-temperature conductivity (10" S/cm) of the nanowires but also shows a much weaker temperature dependence of resistivity and smaller characteristic Mott temperature (T0 = 2.5 x 10~3 K).