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Biosens Bioelectron. 2011 Jan 15;26(5):2685-8. doi: 10.1016/j.bios.2010.07.020. Epub 2010 Jul 15.

Improvement of electrical properties via glucose oxidase-immobilization by actively turning over glucose for an enzyme-based biofuel cell modified with DNA-wrapped single walled nanotubes.

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  • 1Department of Chemical and Biological Engineering, Korea University, 1, Anam-dong, Seongbuk-gu, Seoul 136-701, Republic of Korea.


One of the major areas of study associated with enzyme fuel cells (EFCs) has been identification of redox enzymes with high electron transfer rates that lead to a high power output. The effects of a method of enzyme immobilization by actively turning over glucose on the electrical properties of a fuel cell were evaluated under ambient conditions in attempt to increase the power of an EFC modified with DNA-wrapped single walled carbon nanotubes (SWNTs). The anode cyclic voltammetry (CV cycle) electrical properties increased as a result of glucose oxidase (GOD) immobilization by actively turning over glucose. Furthermore, an EFC that employed DNA-wrapped SWNTs and GOD immobilization in conjunction with protection of the active site increased the stability of the cell, which enabled maintenance of a high level of power production (ca. 730-760 μW cm(-2)) for 1 week.

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