Fabrication and characterization of boron doped diamond microelectrode arrays of varied geometry

Cory A. Rusinek, Michael F. Becker, Robert Rechenberg, Thomas Schuelke

    Research output: Research - peer-reviewArticle

    • 1 Citations

    Abstract

    Boron doped diamond (BDD) is a well-known electrode material that exhibits an excellent electrochemical potential window with very low background current. With this, microelectrodes and microelectrode arrays (MEAs) have been found to even further lower background currents without compromising sensitivity. As such, BDD MEAs are excellent electrode materials for a variety of electroanalytical applications, capable of multi-mode detection. We fabricated BDD MEAs adapting traditional semiconductor microfabrication processes; the resulting MEAs were patterned in different geometries to find an optimum electrochemical response, depending on the application. This is demonstrated using 4 different MEA geometries of different size and spacing using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), where the charge transfer resistance (Rct) increases as the electrodes are farther spaced from one another. Excellent sigmoidal voltammogram shape in CV was obtained for each BDD MEA geometry. BDD MEAs spaced farther from one another were found to give better resolution from the background in fast scan cyclic voltammetric measurements of dopamine due to the decrease in the double layer capacitance (Cdl) as verified with EIS. This work furthers the understanding of BDD MEAs and their pertinence to sensitive electroanalytical techniques.

    LanguageEnglish (US)
    Pages10-14
    Number of pages5
    JournalElectrochemistry Communications
    Volume73
    DOIs
    StatePublished - Dec 1 2016

    Profile

    Diamond
    Boron
    Microelectrodes
    Fabrication
    Geometry
    Diamonds
    Electrodes
    Electrochemical impedance spectroscopy
    Cyclic voltammetry
    Microfabrication
    Charge transfer
    Dopamine
    Capacitance
    Semiconductor materials

    Keywords

    • Boron doped diamond
    • Fabrication
    • Microelectrode arrays

    ASJC Scopus subject areas

    • Electrochemistry

    Cite this

    Fabrication and characterization of boron doped diamond microelectrode arrays of varied geometry. / Rusinek, Cory A.; Becker, Michael F.; Rechenberg, Robert; Schuelke, Thomas.

    In: Electrochemistry Communications, Vol. 73, 01.12.2016, p. 10-14.

    Research output: Research - peer-reviewArticle

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