Journal
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS
Volume 29, Issue 4, Pages 1306-1310Publisher
ELSEVIER
DOI: 10.1016/j.msec.2008.10.031
Keywords
Carbon nanotubes; Polyaniline; Glucose oxidase; Dendrimer-encapsulated nanoparticles; Biosensor
Categories
Funding
- National Natural Science Foundation of China [20676038]
- Key Project of Science and Technology for Ministry of Education [107045]
- Program of Shanghai Subject Chief Scientist [08XD1401500]
- Shanghai Leading Academic Discipline [13502]
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A novel amperometric glucose biosensor based on the nanocomposites of multi-wall carbon nanotubes (CNT) coated with polyaniline (PANI) and dendrimer-encapsulated Pt nanoparticles (Pt-DENs) is prepared. CNT coated with protonated PANI is in situ synthesized and Pt-DENs is absorbed on PANI/CNT composite surface by self-assembly method. Then Glucose oxidase (GOx) is crosslink-immobilizated onto Pt-DENs/PANI/CNT composite film. The results show that the fabricated GOx/Pt-DENs/PANI/CNT electrode exhibits excellent response performance to glucose, such as low detection limit (0.5 mu M), wide linear range (1 mu M-12 mM), short response time (about 5 s), high sensitivity (42.0 mu A mM(-1) cm(-2)) and stability (83% remains after 3 weeks). (C) 2008 Elsevier B.V. All rights reserved.
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