Use of bioelectrode containing DNA-wrapped single-walled carbon nanotubes for enzyme-based biofuel cell

Jin Young Lee, Hyun Yong Shin, Seong Woo Kang, Chulhwan Park, Seung Wook Kim

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


Biofuel cells that utilize enzymes are attractive alternatives to metal catalyst-based cells because they are environmentally friendly, renewable and operate well at room temperature. Glucose oxidase (GOD)/laccase based biofuel cells have been evaluated to determine if they are useful power supplies that can be implanted in vivo. However, the usefulness of GOD/laccase systems is limited because they produce low level of electrical power. The effects of DNA-wrapped single-wall carbon nanotubes (SWNTs) on the electrical properties of a fuel cell are evaluated under ambient conditions in an attempt to increase the electrical power of an enzyme-based biofuel cell (EFC). The anode (GOD) and cathode (laccase) system in the EFC is composed of gold electrodes that are modified with DNA-wrapped SWNTs. Glucose (for anode) and O2 (for cathode) are used as the substrates. The anodic electrical properties increase significantly with a bioelectrode that contains DNA-wrapped SWNTs as an electron-transfer mediator. Furthermore, the modified bioelectrode results in increased activities and stabilities of GOD and laccase, which enhance power production (442 μW cm-2 at 0.46 V) compared with a basic EFC.

Original languageEnglish
Pages (from-to)750-755
Number of pages6
JournalJournal of Power Sources
Issue number3
Publication statusPublished - 2010 Feb 1


  • Carbon nanotube
  • Electron transfer
  • Enzyme-based biofuel cell
  • Glucose
  • Glucose oxidase
  • Laccase

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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