Electrochemical characterization of self-assembled ferrocene-terminated alkanethiol monolayers on low-index gold single crystal electrodes

Alexander V. Rudnev, Koji Yoshida, Thomas Wandlowski

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    We present a voltammetric and in situ STM study of 11-ferrocenyl-1- undecanethiol (FcC11) assembled on low-index single crystal and polycrystalline gold electrodes. The influence of electrode surface structure as well as of structure defects in the self-assembled FcC11 monolayers on the electrochemical response during the oxidation and reduction of the terminal ferrocene group is explored. The nature of the redox peaks is discussed in detail. We identified the coexistence of disordered FcC11 regions with 2D patches of "locally ordered" FcC11 species. We demonstrate that close-packed domains are preferentially formed at atomically flat terraces. Increasing the defect density of the substrate surface leads to a decreasing amount of locally ordered FcC11 molecules.

    Original languageEnglish
    Pages (from-to)770-778
    Number of pages9
    JournalElectrochimica Acta
    Volume87
    DOIs
    Publication statusPublished - 2013 Jan 1

    Keywords

    • Alkanethiol
    • Cyclic voltammetry
    • Ferrocene
    • Gold single crystal
    • Self-assembled monolayer

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Electrochemistry

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