Charge Transport Regime in the PAni-ES/AMPSA/SWNTs Composite Fibre System

The complex dependence of conductivity of composite material to temperature suggest that the heterogeneous model [1, 2] may be suitable for the quantitative determination of electronic transport parameters in both the metallic islands with highly ordered domain and the disordered amorphous regions[3]. The resistivity of the composite, therefore, is determined by the contribution of metallic (crystalline) and non metallic (amorphous) resistivity. The role of each portion in the determination of DC conductivity is described by temperature functions which identify the contribution of each part in the total electrical transport mechanism. The metallic part is described by the quasi VRH one dimensional exponential model [4] and an expression describing the amorphous part of the resistivity which is based on the fluctuation-induced tunneling between metallic islands[3].The measurement of electrical transport over a very broad range of temperatures from 5 K to 340 K has been carried out in current study. This data has been used to understand the influence of carbon nanotubes addition on morphological disorder and the metallic properties of a PAni-ES/AMPSA