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Electrodeposition of nickel nanostructures using silica nanochannels as confinement for low-fouling enzyme-free glucose detection

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Abstract

This work reports an enzyme-free glucose sensor based on nickel nanostructures electrodeposited on a fluorine-doped tin oxide (FTO) electrode modified with a silica nanochannel membrane (SNM). The SNM consists of a high density of nanochannels vertically oriented to the electrode surface, which can spatially confine the electrodeposition of nickel nanostructures and protect them to make Ni@SNM/FTO electrodes. In alkaline media, nickel could be converted to nickel oxyhydroxide that displayed catalytic activity toward the anodic oxidation of glucose. The electrodes could thus function as enzyme-free sensors for glucose detection. Under optimal conditions, the sensors exhibited an excellent analytical performance, with an analytical sensitivity as high as 62.3 μA mM−1 cm−2, a wide detection range from 10 μM to 12 mM and a low detection limit of 0.44 μM. Furthermore, given nickel nanostructures were embedded inside the nanochannels of the SNM (with a diameter of 2–3 nm), the sensor possessed anti-fouling ability and outstanding current stability, thus allowing the direct detection of glucose in dilute blood samples.

Graphical abstract: Electrodeposition of nickel nanostructures using silica nanochannels as confinement for low-fouling enzyme-free glucose detection

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Article information


Submitted
04 Nov 2019
Accepted
13 Dec 2019
First published
14 Dec 2019

J. Mater. Chem. B, 2020, Advance Article
Article type
Paper

Electrodeposition of nickel nanostructures using silica nanochannels as confinement for low-fouling enzyme-free glucose detection

J. Ding, X. Li, L. Zhou, R. Yang, F. Yan and B. Su, J. Mater. Chem. B, 2020, Advance Article , DOI: 10.1039/C9TB02472G

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