A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä

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




TekijätZanfrognini B, Zanardi C, Terzi F, Aaritalo T, Viinikanoja A, Lukkari J, Seeber R

KustantajaSPRINGER

Julkaisuvuosi2011

JournalJournal of Solid State Electrochemistry

Tietokannassa oleva lehden nimiJOURNAL OF SOLID STATE ELECTROCHEMISTRY

Lehden akronyymiJ SOLID STATE ELECTR

Numero sarjassa11-12

Vuosikerta15

Numero11-12

Aloitussivu2395

Lopetussivu2400

Sivujen määrä6

ISSN1432-8488

DOIhttps://doi.org/10.1007/s10008-011-1479-4


Tiivistelmä
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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