Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 137, Issue 1, Pages 134-138Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2008.09.051
Keywords
Carbon nanotube; Titania nanotube; Platinum nanoparticles; Glucose biosensor
Funding
- National Science Foundation of China [20775024, 50725825]
- Specialized Research Fund [20050532024]
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Carbon nanotubes (CNTs)-modified titania nanotube (NT) arrays are prepared by vapor-growing CNTs in the inner of titania NTs. Pt nanoparticles of similar to 3 nm in diameter are uniformly decorated on the as synthesized titania-supported CNTs (TiO2/CNTs) electrode, showing remarkably improved catalytic activities for the oxidation of hydrogen peroxide. The consequent glucose biosensor fabricated by modifying TiO2/CNT/Pt electrode with glucose oxidase (GOx) presents a high sensitivity of 0.24 mu A mM(-1) cm(-2) to glucose in the range of 0.006 mM to 1.5 mM with a response time of less than 3s and a detection limit of 5.7 mu M at 3 signal/noise ratio. (c) 2008 Elsevier B.V. All rights reserved.
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