Journal
COLLOIDS AND SURFACES B-BIOINTERFACES
Volume 82, Issue 1, Pages 168-172Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfb.2010.08.034
Keywords
ZnO nanorod; Biosensor; Glucose oxidase; Electrochemistry
Funding
- National Basic Research Program of China [2007CB936201]
- Funds for International Cooperation and Exchange [50620120439, 2006DFB51000]
- National Natural Science Foundation of China [50972011]
- Beijing Novel Program [2008819]
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We constructed the transferred ZnO biosensor and the grown ZnO biosensor by two different nano ZnO immobilization approaches And the influence of different assembly processes on the biosensor performance has been systematically investigated and compared An enhanced sensitivity of the grown ZnO biosensor is found to be 52% higher than that of the transferred ZnO biosensor Correspondingly the other properties are also better in the grown ZnO biosensor including the response time the detection limit and the linear range These results are well consistent with the fact that more glucose oxidase is Immobilized on the well aligned ZnO arrays which have higher specific surface area and more direct electron communication path in the grown sensor than the randomly distributed and stacked ZnO nanorods in the transferred sensor The nano ZnO grown directly has been demonstrated more desirable for enzymatic immobilization and signal transduction in the high performance biosensors (C) 2010 Elsevier B.V. All rights reserved
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