Enzymatic biofuel cell with self-regulating enzyme-nanotube ensemble films

Takeo Miyake, Syuhei Yoshino, Takeo Yamada, Kenji Hata, Matsuhiko Nishizawa

研究成果: Conference contribution


Nanostructured carbons have been widely used for fabricating enzyme-modified electrodes due to their large specific surface area. However, because they are random aggregates of particular or tubular nanocarbons, the post-modification of enzymes to their intra-nanospace is generally hard to control. Here, we describe a free-standing film of carbon nanotube forest (CNTF) that can form a hybrid ensemble with enzymes through liquid-induced shrinkage. This provides in-situ regulation of its intra-nanospace (inter CNT pitch) to the size of enzymes, and eventually serves as a highly active electrode. The CNTF ensemble with fructose dehydrogenase (FDH) showed the oxidation current density of 16 mA cm -2 in stirred 200 mM fructose solution. The power density of a biofuel cell using the FDH-CNTF anode and the Laccase-CNTF cathode reached 1.8 mW cm -2 (at 0.45 V) in the stirred oxygenic fructose solution, more than 80 % of which could be maintained after continuous operation for 24 h. Application of the free-standing, flexible character of the enzyme-CNTF ensemble electrodes is demonstrated via their use in the patch or wound form.

ホスト出版物のタイトルMEMS, BioMEMS and Bioelectronics - Materials and Devices
出版ステータスPublished - 2012
イベント2011 MRS Fall Meeting - Boston, MA, United States
継続期間: 2011 11 282012 12 2


名前Materials Research Society Symposium Proceedings


Conference2011 MRS Fall Meeting
CountryUnited States
CityBoston, MA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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