28 research outputs found

    Morphological changes in electrochemically deposited poly(3,4-ethylenedioxythiophene) films during overoxidation

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    Electrochemical and morphological properties of thin poly(3,4-ethylenedioxy-thiophene) (PEDOT) films deposited on gold were investigated in aqueous sulfuric acid solutions. X-ray diffraction and electron microscopy were used for monitoring the morphological changes and structure evolution caused by overoxidation. The diffraction peaks of PEDOT became sharper and more intensive during the subsequent oxidation cycles. This indicates that besides the degradation of the PEDOT film, its crystallinity was gradually improved with increasing the number of oxidation cycles. These changes may result in the appearance of novel properties that may be advantageous for specific applications

    Dépôt sur métaux oxydables de films de poly[3,4-éthylènedioxythiophène] électrosynthétisés en milieu aqueux micellaire

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    L'électropolymérisation du 3,4-éthylène dioxythiophène (EDT) a été réalisée en mode galvanostatique sur électrode de Fe et d'Al en milieu aqueux micellaire dodécylsulfate de sodium (SDS) en présence de phtalate de sodium comme sel électrolytique. Des films de PEDT électroactifs, homogènes et adhérents sont obtenus sur Fe et Al. Le rendement faradique γ d'électropolymérisatio
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