Carbon fiber microelectrodes modified with carbon nanotubes as a new support for immobilization of glucose oxidase

Hao Wen, Vijayadurga Nallathambi, Deboleena Chakraborty, Scott Calabrese Barton

    Research output: Research - peer-reviewArticle

    • 24 Citations

    Abstract

    Carboxylated carbon nanotubes were coated onto carbon microfiber electrodes to create a micron-scale bioelectrode. This material has a high surface area and can serve as a support for immobilization of enzymes such as glucose oxidase. A typical carbon nanotube loading of 13 μg cm-1 yields a coating thickness of 17 μm and a 2000-fold increase in surface capacitance. The modified electrode was further coated with a biocatalytic hydrogel composed of a conductive redox polymer, glucose oxidase, and a crosslinker to create a glucose bioelectrode. The current density on oxidation of glucose is 16.6 mA cm-2 at 0.5 V (vs. Ag/AgCl) in oxygen-free glucose solution. We consider this approach to be useful for designing and characterizing surface treatments for carbon mats and papers by mimicking their local microenvironment.

    LanguageEnglish (US)
    Pages283-289
    Number of pages7
    JournalMicrochimica Acta
    Volume175
    Issue number3-4
    DOIs
    StatePublished - Dec 2011

    Profile

    Glucose Oxidase
    Carbon Nanotubes
    Microelectrodes
    Glucose
    carbon fiber
    Carbon
    Electrodes
    Hydrogel
    Surface treatment
    Current density
    Capacitance
    Oxygen
    Coatings
    Oxidation
    Polymers
    Enzymes
    Oxidation-Reduction

    Keywords

    • Biofuel cells
    • Carbon fiber microelectrode
    • Carbon nanotube
    • Electrocatalysis

    ASJC Scopus subject areas

    • Analytical Chemistry

    Cite this

    Carbon fiber microelectrodes modified with carbon nanotubes as a new support for immobilization of glucose oxidase. / Wen, Hao; Nallathambi, Vijayadurga; Chakraborty, Deboleena; Barton, Scott Calabrese.

    In: Microchimica Acta, Vol. 175, No. 3-4, 12.2011, p. 283-289.

    Research output: Research - peer-reviewArticle

    Wen, Hao ; Nallathambi, Vijayadurga ; Chakraborty, Deboleena ; Barton, Scott Calabrese. / Carbon fiber microelectrodes modified with carbon nanotubes as a new support for immobilization of glucose oxidase. In: Microchimica Acta. 2011 ; Vol. 175, No. 3-4. pp. 283-289
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