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Layer-by-layer composite films of polyaniline and vanadium pentoxide sol gels studied by electrochemical surface plasmon spectroscopy

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Abstract

Electroactive multilayer films of polyaniline (PAni) and vanadium pentoxide (V2O5) sol-gels were prepared on gold surfaces by means of the layer-by-layer (LBL) method. The stepwise buildup and the optoelectrochemical behaviour of the composite films were investigated in-situ by electrochemical surface plasmon spectroscopy (ESPS). A thickness increment of 2.3 nm per deposited bilayer was obtained by modelling the surface plasmon spectra. The composite multilayer films display charging-discharging characteristics similar to a bare vanadium pentoxide xerogel network along with an optoelectrochemical response which is dominated by the conducting polymer component. Electrochemical impedance spectroscopy (EIS) experiments confirm the findings from ESPS with regard to the presence of different conductive states of the composite.

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Authors and Affiliations

  1. Institute of Materials Research and Engineering (IMRE), 3 Research Link, Singapore, 117602, Singapore

    R. Schweiss & N. Zhang

  2. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany

    W. Knoll

Authors
  1. R. Schweiss
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  2. N. Zhang
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  3. W. Knoll
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Correspondence to R. Schweiss.

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Schweiss, R., Zhang, N. & Knoll, W. Layer-by-layer composite films of polyaniline and vanadium pentoxide sol gels studied by electrochemical surface plasmon spectroscopy. J Sol-Gel Sci Technol 44, 1–5 (2007). https://doi.org/10.1007/s10971-007-1597-8

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  • DOI: https://doi.org/10.1007/s10971-007-1597-8

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