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Mikrochim Acta. 2018 Jun 26;185(7):339. doi: 10.1007/s00604-018-2866-7.

Non-enzymatic electrochemical glucose sensor based on monodispersed stone-like PtNi alloy nanoparticles.

Wang R1,2, Liang X3,4, Liu H1,2, Cui L5, Zhang X1,2, Liu C1,2.

Author information

1
Tianjin Key Laboratory of Food and Biotechnology, Tianjin University of Commerce, Tianjin, 300134, People's Republic of China.
2
Department of Applied Chemistry, College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, 300134, People's Republic of China.
3
Tianjin Key Laboratory of Food and Biotechnology, Tianjin University of Commerce, Tianjin, 300134, People's Republic of China. lxyi@tjcu.edu.cn.
4
Department of Applied Chemistry, College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, 300134, People's Republic of China. lxyi@tjcu.edu.cn.
5
College of Materials Science and Engineering, Tianjin University, Tianjin, 300072, People's Republic of China.

Abstract

Monodisperse stone-like PtNi alloy nanoparticles (NPs) were synthesized at room temperature using an inverse microemulsion method. The results of XRD, HRTEM, and EDS demonstrate that these NPs consist of a disordered alloy that has (a) a face-centered cubic structure, (b) Pt/Ni atomic ratios of ∼5:1, and (c) a large number of atoms exposed on the NP surface and enclosed by low index facets. The material was placed on a glassy electrode which then displayed superior response to glucose. Best operated at a potential of 0.43 V (vs. SCE), the electrode has the following features: (a) a wide linear range (from 0.5 mM to 40 mM), (b) rapid response (<1 s), (c) a low detection limit (0.35 μM) and (d) a sensitivity of 40.17 μA mM-1cm-2). The NP sensor also is fairly selective over ascorbic acid, uric acid and fructose. The sensor has repeatability and durability for up to 30 days after manufacture. Graphical abstract Non-enzymatic glucose sensor based on a glassy carbon electrode modified with PtNi-NPS enclosed by low index facets. The sensor exhibits excellent features towards detecting glucose.

KEYWORDS:

Bimetal; Catalysis; Enzyme-free sensing; Low index facet; Morphology; Nanocrystals; Texture

PMID:
29946746
DOI:
10.1007/s00604-018-2866-7
[Indexed for MEDLINE]

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