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.

LanguageEnglish (US)
Pages145-151
Number of pages7
JournalJournal of Applied Electrochemistry
Volume42
Issue number3
DOIs
StatePublished - Mar 2012

Profile

Carbon Nanotubes
Microelectrodes
Carbon nanotubes
Biocatalysts
Porosity
Hydrogel
Polystyrenes
Hydrogels
Glucose
Enzymes
Glucose Oxidase
Glucose oxidase
Focused ion beams
Nanotubes
Carbon fibers
Porous materials
Polymers
Current density
Adsorption
Oxidation

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

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