Carbon nanotube-modified biocatalytic microelectrodes with multiscale porosity

Hao Wen, Harshal Manubhai Bambhania, Scott Calabrese Barton

    Research output: Contribution to journalArticle

    • 11 Citations

    Abstract

    Macropores were introduced into nanotube matrices via polystyrene bead templates, and the resulting matrix was applied to carbon fiber microelectrodes as a porous medium for immobilization of enzymatic biocatalysts. The macropores were found to increase the electrochemically active surface area by twofold at a nominal polystyrene mass fraction of 73%. The modified electrodes were further coated with biocatalyst hydrogel comprising glucose oxidase, redox polymer, and crosslinker to create a glucose oxidizing bioanode. Glucose oxidation current density also increased two fold after introduction of the macropores. Focused ion beam cut cross-sections reveal complete adsorption of the enzyme-hydrogel matrix into the CNT layer. This templating technique is a promising approach to the maximization of surface area and transport in bioelectrodes.

    Original languageEnglish (US)
    Pages (from-to)145-151
    Number of pages7
    JournalJournal of Applied Electrochemistry
    Volume42
    Issue number3
    DOIs
    StatePublished - Mar 2012

    Profile

    Enzyme Reactivators
    Biocatalysts
    Microelectrodes
    Hydrogels
    Glucose
    Polystyrenes
    Edema Disease of Swine
    Cellulase
    Glucose oxidase
    Focused ion beams
    Nanotubes
    Carbon fibers
    Porous materials
    Carbon nanotubes
    Current density
    Enzymes
    Porosity
    Adsorption
    Oxidation
    Electrodes

    Keywords

    • Biofuel cells
    • Carbon fiber microelectrode
    • Carbon nanotubes
    • Electrocatalysis
    • Polystyrene particles

    ASJC Scopus subject areas

    • Electrochemistry
    • Chemical Engineering(all)
    • Materials Chemistry

    Cite this

    Carbon nanotube-modified biocatalytic microelectrodes with multiscale porosity. / Wen, Hao; Bambhania, Harshal Manubhai; Calabrese Barton, Scott.

    In: Journal of Applied Electrochemistry, Vol. 42, No. 3, 03.2012, p. 145-151.

    Research output: Contribution to journalArticle

    Wen, Hao; Bambhania, Harshal Manubhai; Calabrese Barton, Scott / Carbon nanotube-modified biocatalytic microelectrodes with multiscale porosity.

    In: Journal of Applied Electrochemistry, Vol. 42, No. 3, 03.2012, p. 145-151.

    Research output: Contribution to journalArticle

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