Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 40, Pages 27795-27800Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp04823h
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan [26790011]
- Grants-in-Aid for Scientific Research [26790011] Funding Source: KAKEN
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Graphene edge sites not only facilitate heterogeneous electron transfer reactions of redox species because of localization of electrons, but also allow sensitivities and selectivities to be tuned by controlling the atomic oxygen/carbon (O/C) ratio. Here, we immobilized fructose dehydrogenase (FDH) onto the surface of cup-stacked carbon nanofibers (CSCNFs), which provide highly ordered graphene edges with a controlled O/C ratio, and investigated the direct electron communication with FDH. As the O/C ratio decreased at the CSCNF surface, the negative zeta potential was mitigated and the electrochemical communication with FDH was facilitated. This is likely due to improved orientation of FDH molecules on the CSCNF surface. CSCNFs with a controlled O/C ratio could be applied to FDH-based D-fructose biosensors with tunable dynamic range and fructose biofuel cells with a controlled maximum current.
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