Electrosynthesis of poly(3,4-ethylenedioxythiophene) (PEDOT) films was performed in a micellar aqueous
solution containing sodium dodecyl sulfate (SDS) by cyclic voltammetry, chronoamperometry, and
chronopotentiometry on a platinum electrode. The electrocatalytic effect of SDS was characterized by a
significant decrease of the EDOT oxidation potential (E
p) in the micellar medium relative to 0.1 M LiClO4
acetonitrile as well as aqueous solutions. Linear variation of E
p with SDS concentration indicated the
formation of a pseudocomplex (K
eq = 5.4 × 103 M-1). PEDOT films were characterized electrochemically
and spectroscopically (UV−visible, X-ray photoelectron spectroscopy, IR, Raman spectra). Regular, well-ordered, and adherent films were obtained in SDS medium. The PEDOT film morphologies investigated
by atomic force microscopy suggested the possible presence of columnar structures when the electrosynthesis
is performed in the micellar medium.
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