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Polypyrrole Nanofibers with Extended 1D Hierarchical Structure
Author(s) -
Wójcik Kamil,
Grzeszczuk Maria
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700472
Subject(s) - polypyrrole , electrosynthesis , bilayer , conductive polymer , redox , polymerization , materials science , chemical engineering , layer (electronics) , nanofiber , electrochemistry , chemistry , polymer chemistry , nanotechnology , polymer , inorganic chemistry , electrode , membrane , composite material , biochemistry , engineering
Abstract A two‐step electrochemical synthesis of polypyrrole nanofibers with a fractal‐like surface structure is described. The bilayer structure of polypyrrole on a Pt substrate provided protection of the polymer against overoxidation. The polypyrrole bilayer is electronically conductive. Specific charge‐transport properties originated from the primary counter ions used in the two‐step electrosynthesis. When the outer layer of polypyrrole was involved in cation exchange during redox switching, the inner layer of anion exchanging polypyrrole was set at its conductive oxidized state, thus providing a stable reversible redox activity of the former. The growth dimensionality of the outer layer (1D or 2D) depended on the concentration of the anionic surfactant in the polymerization solution.