Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 11, Issue 11, Pages 2105-2108Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.09.005
Keywords
Microelectrode; Mesoporous carbon; Glucose oxidase; Ionic liquid; Direct electrochemistry
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Funding
- Singapore A*STAR [052 117 0031]
- Foundation of University Teacher International Training Project of Shandong Province
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A functional composite was prepared by mixing mesoporous carbon, glucose oxidase (GOD) and 1-butyl-3-methylimidazolium hexafluorophosphate, an ionic liquid, and characterized by SEM and RA-IR. The composite was filled in a microcavity to fabricate a paste microelectrode, demonstrating direct electrochemistry of GOD with a pair of well-defined redox peaks. The composite microelectrode was used as a glucose microsensor, showing good sensitivity over a concentration range from 10.0 to 80.0 mu mol/L and a Michaelis-Menten constant of 2.42 mu mol/L This work demonstrates an efficient and accurate approach to study direct electrochemistry with potential applications in various enzymatic biosensors. (C) 2009 Elsevier B.V. All rights reserved.
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