TY - GEN
T1 - Enzyme-based biofuel cell designed for direct power generation from biofluids in living organisms
AU - Miyake, T.
AU - Yoshino, S.
AU - Ofuji, T.
AU - Kaji, H.
AU - Nishizawa, M.
PY - 2012/1/1
Y1 - 2012/1/1
N2 - Enzymatic biofuel cells have attracted much attention for their potential to directly use biochemical energy sources in living organisms such as animals, fruits, etc. However, generally natural organisms have a skin, and the oxygen concentration in the organisms is lower than that of biofuels like sugars. Here, we fabricated a miniature assembly that consists of a needle bioanode for accessing biofuels in organisms through their skins and a gas-diffusion biocathode for utilizing abundant oxygen in air, for the first time. The performance of the biocathode was fourfold improved by optimizing its hydrophobicity. The assembled device with a needle anode for fructose oxidation was inserted into a raw grape, producing a maximum power of 26.5 μW (115 μW cm-2) at 0.34 V. A light-emitting diode (LED) with the cell served as a self-powered indicator of the sugar level in the grape. Power generation from blood sugar was also investigated by inserting a needle anode for glucose oxidation into a blood vessel in a rabbit ear. Prior coating of the tip of the needle anode with an antibiofouling agent was effective to stabilize output power.
AB - Enzymatic biofuel cells have attracted much attention for their potential to directly use biochemical energy sources in living organisms such as animals, fruits, etc. However, generally natural organisms have a skin, and the oxygen concentration in the organisms is lower than that of biofuels like sugars. Here, we fabricated a miniature assembly that consists of a needle bioanode for accessing biofuels in organisms through their skins and a gas-diffusion biocathode for utilizing abundant oxygen in air, for the first time. The performance of the biocathode was fourfold improved by optimizing its hydrophobicity. The assembled device with a needle anode for fructose oxidation was inserted into a raw grape, producing a maximum power of 26.5 μW (115 μW cm-2) at 0.34 V. A light-emitting diode (LED) with the cell served as a self-powered indicator of the sugar level in the grape. Power generation from blood sugar was also investigated by inserting a needle anode for glucose oxidation into a blood vessel in a rabbit ear. Prior coating of the tip of the needle anode with an antibiofouling agent was effective to stabilize output power.
KW - Bioelectrode
KW - Miniature biofuel cell
KW - Power generation
UR - http://www.scopus.com/inward/record.url?scp=84901745019&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84901745019&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84901745019
SN - 9780979806452
T3 - Proceedings of the 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2012
SP - 1432
EP - 1434
BT - Proceedings of the 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2012
PB - Chemical and Biological Microsystems Society
T2 - 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2012
Y2 - 28 October 2012 through 1 November 2012
ER -