Structure and Properties of Polyaniline Nanofibers

The spectroscopic features (FTIR, UV-vis) of both powders and films of PANI-NFs are essentially identical to conventional nonfibrillar PANI in the emeraldine oxidation state [51,131]. UV-vis absorption and X-ray diffraction studies have shown that the PANI-NFs, 

Four-probe pressed-pellet conductivities for PANI emeraldine hydrochloride nanofibers are in the range 2-10 S cm [51], similar to conventional PANI emeraldine hydrochloride powder [1]. Maximum conductivities of PANI-NFs prepared by various template and template-free methods are given in Tables 2.1 and 2.2, respectively. 

Method of PANI-NFs preparation Maximum conductivity (S cm ) Refs. 

Higher coloration efficiency, larger charge capacity, enhanced cycling stability and faster color-bleach rates were observed for nanofibrUlar PANI films, obtained by electropolymerization from an aqueous medium in the presence of an ionic liquid (1-ethyl, 3-methylimidazolium bromide), as compared to that shown by nonfibrillar PANI films fabricated from PEG solution [279]. 

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