Engineering graphene/carbon nanotube hybrid for direct electron transfer of glucose oxidase and glucose biosensor
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The graphene/carbon nanotube hybrid was designed and implemented by a deoxygenation process for direct electron transfer of glucose oxidase and glucose biosensor. The procedure was analyzed by transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectra, etc. The strategy of structurally engineering one-dimensional carbon nanotube (CNT) and two-dimensional graphene oxide (GO) presented three benefits: (a) a deoxygenation process between GO and acid-CNT was introduced under strongly alkaline condition; (b) GO prevented the irreversible integration of CNT; and (c) CNT hindered the restacking of GO. The RGO interacted with CNT through the van der Waals forces and π–π stacking interaction. The three-dimensional hybrid not only had a high surface area, but also exhibited a good electronic conductivity. A direct electrochemistry of glucose oxidase was obtained on the nanohybrid modified electrode which showed good response for glucose sensing. This study would provide a facile and green method for the preparation of nanohybrid for a wide range of applications including biosensing, super capacitor, and transparent electrode.
KeywordsGraphene Carbon nanotube Glucose oxidase Three-dimensional hybrid Biosensor Direct electrochemistry
This work was financially supported by the National Natural Science Foundation of China (Nos. 21075051, 21143008 and 50832001), Program for New Century Excellent Talents in University (NCET-10-0433), the “211” and “985” project of Jilin University, China, and State Key Laboratory of Electroanalytical Chemistry, CIAC, CAS.
- 24.Hong T-K, Lee DW, Choi HJ, Shin HS, Kim B-S (2010) ACS Nano 4:8Google Scholar