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Electronic Structure and Doping Behavior of PANI‐NSA Nanofibers Investigated by Resonance Raman Spectroscopy
Author(s) -
do Nascimento Gustavo M.,
Silva Claudio H. B.,
Temperini Marcia L. A.
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200500690
Subject(s) - raman spectroscopy , polyaniline , nanofiber , materials science , doping , polymerization , scanning electron microscope , protonation , resonance raman spectroscopy , chemical engineering , polymer chemistry , nanotechnology , chemistry , polymer , composite material , organic chemistry , optics , optoelectronics , physics , engineering , ion
Summary: Polyaniline nanofibers (from 93 to 220 nm) doped with β ‐naphtalenesulfonic acid (PANI‐NSA) have been characterized. Nonhomogeneity in the thickness of fibers, as can be seen with scanning electron microscopy, is the reason for their instability under the HCl doping process. Resonance Raman spectral profiles of PANI‐NSA fibers suggest a lower protonation state than the emeraldine salt forms. Observation of Raman bands, which are a result of cross‐linking, confirms that one of the properties of the polymeric structure formed in micellar polymerization is the type of connection between chains.