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Formation and electronic conductivity of polyaniline
Author(s) -
Thyssen A.,
Borgerding A.,
W. Schultze J.
Publication year - 1987
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19870080112
Subject(s) - polyaniline , nucleation , materials science , conductivity , metal , phase (matter) , layer (electronics) , dielectric , deposition (geology) , chemical engineering , electron transfer , chemical physics , composite material , chemistry , metallurgy , photochemistry , optoelectronics , polymerization , organic chemistry , paleontology , sediment , engineering , biology , polymer
Potentiostatic measurements of polyaniline (PANI) formation show the growth of a metallic conducting phase, probably growing after instantaneous nucleation by a semisphere mechanism. The double layer capacity proves the formation of a metallic phase at first, but in a later stage the surface is covered by any dielectric reaction product forming an interface of a few nm thickness. Various measurements of electron transfer reactions show the very good conductivity of the PANI film within a potential range of 0 to 1 V. A large nucleation overvoltage hinders the cathodic metal deposition. Oxidation at higher potentials causes an overoxidation with the formation of an insulating film.