A1 Refereed original research article in a scientific journal
Layer-by-layer deposition of a polythiophene/Au nanoparticles multilayer with effective electrochemical properties
Authors: Zanfrognini B, Zanardi C, Terzi F, Aaritalo T, Viinikanoja A, Lukkari J, Seeber R
Publisher: SPRINGER
Publication year: 2011
Journal: Journal of Solid State Electrochemistry
Journal name in source: JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Journal acronym: J SOLID STATE ELECTR
Number in series: 11-12
Volume: 15
Issue: 11-12
First page : 2395
Last page: 2400
Number of pages: 6
ISSN: 1432-8488
DOI: https://doi.org/10.1007/s10008-011-1479-4
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.
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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