Journal
ELECTROANALYSIS
Volume 22, Issue 11, Pages 1223-1228Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.200900556
Keywords
Chemically modified electrode; Ionic liquids; Electron transfer; Glucose biosensor; Electrochemistry; Biosensors
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Funding
- MKE through KEIT
- Ministry of Education, Science and Technology through the National Research Foundation of Korea [R32-2008-000-10142-0]
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Nanohybrids of chemically modified graphene (CMG) and ionic liquid (IL) were prepared by sonication to modify the electrode. The modified CMG-IL electrodes showed a higher current and smaller peak-to-peak potential separation than a bare electrode due to the promoted electron transfer rate. Furthermore, the glucose oxidase (GOx) immobilized on the modified electrode displayed direct electron transfer rate and symmetrical redox potentials with a linear relationship at different scan rates. The fabricated GOx/CMG-IL electrodes were developed selective glucose biosensor with respect to a sensitivity of 0.64 mu A mM(-1), detection limit of 0.376 mM, and response time of <5 s.
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