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Electrochemistry of glucose oxidase immobilized on carbon nanotubes noncovalently functionalized by multihydroxyl and multicarboxyl groups |
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| Authors: | Chao-Hua Xue Ren-Jia Zhou Min-Min Shi Gang Wu Xiao-Bin Zhang Mang Wang Hong-Zheng Chen |
| Affiliation: | 1. Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, State Key Lab of Silicon Materials, & Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, PR China;2. Zhejiang-California International Nanosystems Institute, Hangzhou 310027, PR China;3. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China |
| Abstract: | In this paper we have described that multi-walled carbon nanotubes (MWNTs) can be homogeneously dispersed and solubilized in water using non-covalent functionalization. These soluble MWNTs were then used for the immobilization of glucose oxidase (GOx) on glassy carbon electrode. Scanning electron microscopy is used to investigate the nanoscale structure of the film formed by the functionalized MWNTs. Electrochemical measurements were conducted to reveal the electroactivity of the GOx on the MWNT modified electrode. The functionalized MWNTs served as a network carrier for GOx as well as a conductor, enhancing greatly the response current. The GOx immobilized in this way retained its bioelectrocatalytic activity for the oxidation of glucose. |
| Keywords: | Carbon nanotubes Functionalization Electrochemistry Biosensor Glucose oxidase |
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