Journal
ELECTROCHIMICA ACTA
Volume 58, Issue -, Pages 179-183Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.09.030
Keywords
Helical carbon nanotubes; Glucose oxidase; Biosensor; Magnetic electrode
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Funding
- National Natural Science Foundation of China [20905010, 51001019]
- National Basic Research Program of China [2011CB933502]
- China Postdoctoral Science Foundation [20100471293]
- Fundamental Research Funds for the Central Universities [1112020504]
- Changshu Institute of Technology (Thesis) team
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Poly(diallyldimethylammonium chloride) functionalized helical carbon nanotubes (PDDA-HCNTs) were successfully synthesized. The resulting PDDA-HCNTs composite has good conductivity, solubility and ferromagnetic property. The fabricated HCNTs could be conveniently separated and magnetically attached to the magnetic electrode owing to their excellent magnetic properties. An amperometric biosensor was firstly developed based on glucose oxidase (GOD) functionalized PDDA-HCNTs loaded on magnetic glass carbon electrode. The constructed biosensor exhibited excellent electrocatalytic activity and stability for the detection of glucose with a linear range from 5 to 85 p,M and a low detection limit of 0.72 mu M at 3 sigma. The present work offers a new avenue to broaden the applications of HCNTs in electrochemical biosensors. (C) 2011 Elsevier Ltd. All rights reserved.
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