Journal
ELECTROCHIMICA ACTA
Volume 187, Issue -, Pages 413-421Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.11.085
Keywords
Nickel nanosheet; Nanodiamond; Boron-doped diamond; Non-enzymatic biosensor; Glucose
Categories
Funding
- Hi-tech Research and Development Program of China (863 Program) [2013AA030801]
- National Nature Science Foundation of China [61301045, 61401306, 61504096]
- Natural Science Foundation of Tianjin [13JCZDJC36000, 15JCYBJC24000]
- Excellent Young Teachers Program of Tianjin
- Youth Topnotch Talents Program of Tianjin
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A stable and sensitive non-enzymatic glucose sensor was prepared by modifying a boron-doped diamond (BDD) electrode with nickel (Ni) nanosheets and nanodiamonds (NDs). The NDs were electrophoretically deposited on the BDD surface, and acted as nucleation sites for the subsequent electrodeposition of Ni. The morphology and composition of the modified BDD electrodes were characterized by field-emission scanning electron microscopy and energy-dispersive X-ray spectroscopy, respectively. The Ni nanosheet-ND modified BDD electrode exhibited good current response towards the non-enzymatic oxidation of glucose in alkaline media. The NDs significantly extended the potential window. The response to glucose was linear over the 0.2-1055.4-mu M range. The limit of detection was 0.05 mu M, at a signal-to-noise ratio of 3. The Ni nanosheet-ND/BDD electrode exhibited good selectivity, reproducibility and stability. Its electrochemical performance, low cost and simple preparation make it a promising non-enzymatic glucose sensor. (C) 2015 Elsevier Ltd. All rights reserved.
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