Microfabrication and characterization of cylinder micropillar array electrodes

Ricard Prehn, Llibertat Abad, David Sánchez-Molas, Marta Duch, Neus Sabaté, F. Javier Del Campo, Francesc Xavier Muñoz, Richard G. Compton

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    27 Citations (Scopus)


    This work describes de fabrication, using standard microfabrication techniques, of cylindrical micropillar array electrodes. The work also describes the characterization of these electrodes using a combination of microscopy techniques, cyclic voltammetry and finite-element simulations based on the diffusion domain approach. The work shows that while micropillar array electrodes display currents consistent with the Randles- Ševčík equation at low scan rates, they afford enhanced voltammetric peak currents at higher scan rates. Not only this, but for certain micropillar geometries and densities, simulations predict that a voltammetric peak-to-peak separations below 57 mV due to thin-layer diffusion effects. The results presented in this article are in agreement with recent works by Compton and co-workers on porous and rough electrodes, and provide further evidence of the validity of the diffusion domain approach to predict and interpret mass transport controlled currents at microstructured electrodes. © 2011 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)361-370
    JournalJournal of Electroanalytical Chemistry
    Issue number2
    Publication statusPublished - 15 Nov 2011


    • Diffusion domain approach
    • Electrochemistry
    • Microelectrodes
    • Microfabrication
    • Micropillar array electrodes


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