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Layer-by-layer deposition of a polythiophene/Au nanoparticles multilayer with effective electrochemical properties

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Abstract

Multilayers consisting of a water soluble polythiophene derivative and Au nanoparticles have been deposited onto different electrode substrates by means of layer-by-layer deposition technique. The assembly of the films has been performed by taking advantage of the electrostatic interactions between the positively charged imidazolic moiety of the polythiophene chain and the negative charges of citrate ions surrounding Au nanoparticles, as well of the affinity of S to Au. The nanoparticles result stably grafted to the organic matrix. The resulting modified electrodes have been characterised through electrochemical, spectroelectrochemical and microscopic techniques. The results evidenced that a high number of individual nanoparticles is present inside the multilayer. The presence of nanoparticles is of chief importance for most effective charge percolation through the multilayer, as suggested by the responses to electroactive probe species in solution. The electrocatalytic performances of the modified electrodes have been tested with respect to the oxidation of ascorbic acid.

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Authors and Affiliations

  1. Department of Chemistry, University of Modena and Reggio Emilia, via G. Campi 183, 41125, Modena, Italy

    Barbara Zanfrognini, Chiara Zanardi, Fabio Terzi & Renato Seeber

  2. Department of Chemistry and Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, FIN-20014, Turku, Finland

    Timo Ääritalo, Antti Viinikanoja & Jukka Lukkari

Authors
  1. Barbara Zanfrognini
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  2. Chiara Zanardi
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  3. Fabio Terzi
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  4. Timo Ääritalo
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  5. Antti Viinikanoja
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  6. Jukka Lukkari
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  7. Renato Seeber
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Correspondence to Renato Seeber.

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Zanfrognini, B., Zanardi, C., Terzi, F. et al. Layer-by-layer deposition of a polythiophene/Au nanoparticles multilayer with effective electrochemical properties. J Solid State Electrochem 15, 2395–2400 (2011). https://doi.org/10.1007/s10008-011-1479-4

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  • DOI: https://doi.org/10.1007/s10008-011-1479-4

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