Direct electron transfer of glucose oxidase immobilized in an ionic liquid reconstituted cellulose-carbon nanotube matrix
Wu, X, Zhao, F, Varcoe, JR, Thumser, AE, Avignone-Rossa, C and Slade, RCT (2009) Direct electron transfer of glucose oxidase immobilized in an ionic liquid reconstituted cellulose-carbon nanotube matrix Bioelectrochemistry, 77 (1). 64 - 68. ISSN 1567-5394
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A conductive cellulose – multiwalled carbon nanotube (MWCNT) matrix with a porous structure and good biocompatibility has been prepared by using room temperature ionic liquids (1–ethyl–3–methylimidazolium acetate) as solvent. Glucose oxidase (GOx) was encapsulated in this matrix and thereby immobilized on surface of a glassy carbon. The direct electron transfer and electrocatalysis of the encapsulated GOx has been investigated using cyclic voltammetry and chronoamperometry. The GOx exhibited a pair of stable, well defined and nearly symmetric reversible redox peaks. The experimental results also demonstrate that the immobilized GOx retains its biocatalytic activity toward the oxidation of glucose, which can be employed to determine the glucose concentration. The results showed that the bioelectrode modified by the reconstitute cellulose–MWCNT matrix has great potential for use as a biosensor and other bioelectronics devices.
|Additional Information:||NOTICE: this is the author’s version of a work that was accepted for publication in Bioelectrochemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Bioelectrochemistry, 77(1), November 2009, DOI 10.1016/j.bioelechem.2009.05.008.|
|Divisions:||Faculty of Engineering and Physical Sciences > Chemistry|
|Depositing User:||Mr Adam Field|
|Date Deposited:||13 Jun 2012 13:34|
|Last Modified:||23 Sep 2013 19:21|
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