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Electrochemical formation and properties of thin polyaniline films on Au(111) and p-Si(111)

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Abstract

The specific aspects of phase formation phenomena involved in electrodeposition of conducting polymer layers are critically discussed. The mechanism of formation and the properties of electrodeposited thin polyaniline (PANI) films on Au(111) and p-Si(111) are investigated by means of transient measurements, cyclic voltammetry, electrochemical impedance spectroscopy and atomic force microscopy (AFM). Experimental results show that the initial stages of PANI electrodeposition on Au(111) can be described by a model including progressive appearance and preferential 2D growth of polymer islands. The electropolymerization process on p-Si(111) substrates is preceded by anodic formation of an inhomogeneous thin SiO2 layer giving rise to a progressive appearance and growth of 3D PANI islands. The electrochemical redox properties of electrodeposited PANI films on p-Si(111) are influenced strongly by the electronic band structure of silicon.

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Authors and Affiliations

  1. Institute of Bio- and Nanosystems (IBN 3), and CNI-Centre of Nanoelectronic Systems for Information Technology, Research Centre Jülich, 52425, Jülich, Germany

    L. Komsiyska & G. Staikov

  2. Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria

    V. Tsakova

Authors
  1. L. Komsiyska
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  2. V. Tsakova
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  3. G. Staikov
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Correspondence to G. Staikov.

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PACS

81.10.Aj; 82.45.Wx; 82.45.Vp

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Komsiyska, L., Tsakova, V. & Staikov, G. Electrochemical formation and properties of thin polyaniline films on Au(111) and p-Si(111). Appl. Phys. A 87, 405–409 (2007). https://doi.org/10.1007/s00339-007-3905-0

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  • DOI: https://doi.org/10.1007/s00339-007-3905-0

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