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11 September 2007 Interaction of [FeFe]-hydrogenases with single-walled carbon nanotubes
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Single-walled carbon nanotubes (SWNT) are promising candidates for use in energy conversion devices as an active photo-collecting elements, for dissociation of bound excitons and charge-transfer from photo-excited chromophores, or as molecular wires to transport charge. Hydrogenases are enzymes that efficiently catalyze the reduction of protons from a variety of electron donors to produce molecular hydrogen. Hydrogenases together with SWNT suggest a novel biohybrid material for direct conversion of sunlight into H2. Here, we report changes in SWNT optical properties upon addition of recombinant [FeFe] hydrogenases from Clostridium acetobutylicum and Chlamydomonas reinhardtii. We find evidence that novel and stable charge-transfer complexes are formed under conditions of the hydrogenase catalytic turnover, providing spectroscopic handles for further study and application of this hybrid system.
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Drazenka Svedruzic Chang, Timothy J. McDonald, Yong-Hyun Kim, Jeffrey L. Blackburn, Michael J. Heben, and Paul W. King "Interaction of [FeFe]-hydrogenases with single-walled carbon nanotubes", Proc. SPIE 6650, Solar Hydrogen and Nanotechnology II, 665011 (11 September 2007);

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