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A high-performance glucose biosensor using covalently immobilised glucose oxidase on a poly(2,6-diaminopyridine)/carbon nanotube electrode
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, Faculty of Science & Engineering.
University of Zanjan, Iran .
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, The Institute of Technology.
2013 (English)In: Talanta: The International Journal of Pure and Applied Analytical Chemistry, ISSN 0039-9140, E-ISSN 1873-3573, Vol. 116, 801-808 p.Article in journal (Refereed) Published
Abstract [en]

A highly-sensitive glucose biosensor amenable to ultra-miniaturisation was fabricated by immobilisation of glucose oxidase (GOx), onto a poly(2,6-diaminopyridine)/multi-walled carbon nanotube/glassy carbon electrode (poly(2,6-DP)/MWNT/GCE). Cyclic voltammetry was used for both the electrochemical synthesis of poly-(2,6-DP) on the surface of a MWNT-modified GC electrode, and characterisation of the polymers deposited on the GC electrode. The synergistic effect of the high active surface area of both the conducting polymer, i.e., poly-(2,6-DP) and MWNT gave rise to a remarkable improvement in the electrocatalytic properties of the biosensor. The transfer coefficient (alpha), heterogeneous electron transfer rate constant and Michaelis-Menten constant were calculated to be 0.6, 4 s(-1) and 0.20 mM at pH 7.4, respectively. The GOx/poly(2,6-DP)/MWNT/GC bioelectrode exhibited two linear responses to glucose in the concentration ranging from 0.42 mu M to 8.0 mM with a correlation coefficient of 0.95, sensitivity of 52.0 mu AmM-1 cm(-2), repeatability of 1.6% and long-term stability, which could make it a promising bioelectrode for precise detection of glucose in the biological samples. (C) 2013 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
Elsevier , 2013. Vol. 116, 801-808 p.
Keyword [en]
Glucose biosensor, Direct electron transfer, Glucose oxidase, MWNT/poly-(2, 6-diaminopyridine)
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-102852DOI: 10.1016/j.talanta.2013.07.068ISI: 000328176000114OAI: oai:DiVA.org:liu-102852DiVA: diva2:683823
Note

Funding Agencies|European Commission|PIIF-GA-2009-254955|LIST - Linkoping University||Zanjan University Research Council||

Available from: 2014-01-07 Created: 2014-01-02 Last updated: 2017-12-06

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Ali Kamyabi, MohammadTurner, AnthonyTiwari, Ashutosh

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Biosensors and BioelectronicsFaculty of Science & EngineeringThe Institute of Technology
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Talanta: The International Journal of Pure and Applied Analytical Chemistry
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