Journal
NANOSCALE
Volume 4, Issue 10, Pages 3123-3127Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2nr30302g
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Funding
- United States NSF [DMR-0847786]
- Natural Science Foundations of China [90923008, J1103305]
- Natural Science Foundations of Guangdong Province [9251027501000002]
- Academic New Artist Ministry of Education Doctoral Post Graduate (China)
- China Scholarship Council
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We report a seed-mediated hydrothermal growth of free-standing nickel hydroxide [Ni(OH)(2)] and nickel oxide (NiO) nanoflake arrays and their implementation as electrodes for non-enzymatic glucose sensors. Ni(OH)(2) nanoflakes were converted into porous NiO nanoflakes upon thermal annealing in air at temperatures of 300 degrees C or above. NiO nanoflake-arrayed sensors achieve an excellent glucose sensitivity of similar to 8500 mu A cm(-2) mM(-1) and a low detection limit of 1.2 mu M glucose at an applied bias of 0.5 V vs. Ag/AgCl. The fabrication of the nanoflake electrode avoids the use of polymer binders representing additional advantage over the conventional powder based glucose sensors. Furthermore, they show good specificity to glucose in the presence of ascorbic acid, D-lactose and D-fructose.
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