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Influence of the working electrode metal on the polythiophene structure. Raman and x‐ray photoelectron spectroscopic investigations of the aluminium/polythiophene interface
Author(s) -
Bazzaoui E. A.,
Aubard J.,
Elidrissi A.,
Ramdani A.,
Lévi G.
Publication year - 1998
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/(sici)1097-4555(199809)29:9<799::aid-jrs305>3.0.co;2-z
Subject(s) - polythiophene , raman spectroscopy , thiophene , materials science , polymerization , electrode , x ray photoelectron spectroscopy , covalent bond , metal , aluminium , polymer , conductive polymer , electrochemistry , chemical engineering , analytical chemistry (journal) , chemistry , organic chemistry , composite material , metallurgy , optics , physics , engineering
Polythiophene films of different thicknesses were obtained by electrochemical polymerization of thiophene on to oxidizable (Zn, Fe and Al) and noble (Pt) metals. Resonance Raman and x‐ray photoelectron analyses indicated, on the one hand, a better structural organization of the films synthesized on to Zn, Fe and Al in comparison with those deposited on to Pt and, on the other hand, an increase in disorder with the film thickness for each metal. In the case of Al electrodes, on the basis of experimental data, it was suggested that during the first stages of electropolymerization, interactions between Al and C α atoms occur at the interface and lead to the formation of real covalent bonds between the metal and the organic coating. This, in part, could explain the strong adhesion of the polymer on the electrode surface, its significant thermal stability towards the laser local heating and the enhancement of the Raman intensity. © 1998 John Wiley & Sons, Ltd.