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: Contribution to journalArticle

  • 30 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
Electrodes
Hydrogel
Surface treatment
Current density
Capacitance
Oxygen
Coatings
Oxidation
Polymers
Enzymes
carbon fiber

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: Contribution to journalArticle

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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