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Hydrothermal synthesis of NiWO4 crystals for high performance non-enzymatic glucose biosensors.

Mani S, Vediyappan V, Chen SM, Madhu R, Pitchaimani V, Chang JY, Liu SB - Sci Rep (2016)

Bottom Line: A facile hydrothermal route for the synthesis of ordered NiWO4 nanocrystals, which show promising applications as high performance non-enzymatic glucose sensor is reported.The NiWO4-modified electrodes showed excellent sensitivity (269.6 μA mM(-1 )cm(-2)) and low detection limit (0.18 μM) for detection of glucose with desirable selectivity, stability, and tolerance to interference, rendering their prospective applications as cost-effective, enzyme-free glucose sensors.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan.

ABSTRACT
A facile hydrothermal route for the synthesis of ordered NiWO4 nanocrystals, which show promising applications as high performance non-enzymatic glucose sensor is reported. The NiWO4-modified electrodes showed excellent sensitivity (269.6 μA mM(-1 )cm(-2)) and low detection limit (0.18 μM) for detection of glucose with desirable selectivity, stability, and tolerance to interference, rendering their prospective applications as cost-effective, enzyme-free glucose sensors.

No MeSH data available.


Related in: MedlinePlus

Electrochemical performances of NiWO4-modified electrodes.CV curves recorded (A) without and (C) with the presence of glucose (100 μM) in 0.1 M NaOH electrolyte solution at different scan rates (10–100 mV s−1). (B) Comparisons of CV curves obtained from (a) bare GCE, and NiWO4-modified GCEs (b) without and (c) with glucose (100 μM glucose) recorded with a scan rate of 50 mV s−1. (D) CV curves recorded under varied concentrations of glucose (99–909 μM). All insets show corresponding calibration plots.
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f5: Electrochemical performances of NiWO4-modified electrodes.CV curves recorded (A) without and (C) with the presence of glucose (100 μM) in 0.1 M NaOH electrolyte solution at different scan rates (10–100 mV s−1). (B) Comparisons of CV curves obtained from (a) bare GCE, and NiWO4-modified GCEs (b) without and (c) with glucose (100 μM glucose) recorded with a scan rate of 50 mV s−1. (D) CV curves recorded under varied concentrations of glucose (99–909 μM). All insets show corresponding calibration plots.

Mentions: Figure 5A displays the CV curves of the blank NiWO4-modified GCE recorded in 0.1 M NaOH electrolyte solution at different scan rates (10–100 mV s−1) while in the absence of glucose. Both anodic (Ipa) and cathodic (Ipc) redox peak currents as well as their peak-to-peak separation were found to increase linearly with increasing scan rate (see inset, Fig. 5A), indicating the occurance of a surface-controlled electrochemical process. By comparison, such redox peaks were invisible in bare GCE (curve a; Fig. 5B). In the absence of glucose, the neat NiWO4-modified GCE exhibited well-defined redox peak potentials (Epa and Epc) of 0.51 and 0.37 V at a fixed scan rate of 50 mV s−1 (curve b; Fig. 5B), resembling that of the neat NiO-modified GCE32. In this context, while the existence of WO42− polyanions in the NiWO4 composite helps to promote a higher electrical conductivity, the presence of NiO should play the key role for the observed redox behavior243334, which may be explained by the mechanism proposed by Wang et al.15:


Hydrothermal synthesis of NiWO4 crystals for high performance non-enzymatic glucose biosensors.

Mani S, Vediyappan V, Chen SM, Madhu R, Pitchaimani V, Chang JY, Liu SB - Sci Rep (2016)

Electrochemical performances of NiWO4-modified electrodes.CV curves recorded (A) without and (C) with the presence of glucose (100 μM) in 0.1 M NaOH electrolyte solution at different scan rates (10–100 mV s−1). (B) Comparisons of CV curves obtained from (a) bare GCE, and NiWO4-modified GCEs (b) without and (c) with glucose (100 μM glucose) recorded with a scan rate of 50 mV s−1. (D) CV curves recorded under varied concentrations of glucose (99–909 μM). All insets show corresponding calibration plots.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4834566&req=5

f5: Electrochemical performances of NiWO4-modified electrodes.CV curves recorded (A) without and (C) with the presence of glucose (100 μM) in 0.1 M NaOH electrolyte solution at different scan rates (10–100 mV s−1). (B) Comparisons of CV curves obtained from (a) bare GCE, and NiWO4-modified GCEs (b) without and (c) with glucose (100 μM glucose) recorded with a scan rate of 50 mV s−1. (D) CV curves recorded under varied concentrations of glucose (99–909 μM). All insets show corresponding calibration plots.
Mentions: Figure 5A displays the CV curves of the blank NiWO4-modified GCE recorded in 0.1 M NaOH electrolyte solution at different scan rates (10–100 mV s−1) while in the absence of glucose. Both anodic (Ipa) and cathodic (Ipc) redox peak currents as well as their peak-to-peak separation were found to increase linearly with increasing scan rate (see inset, Fig. 5A), indicating the occurance of a surface-controlled electrochemical process. By comparison, such redox peaks were invisible in bare GCE (curve a; Fig. 5B). In the absence of glucose, the neat NiWO4-modified GCE exhibited well-defined redox peak potentials (Epa and Epc) of 0.51 and 0.37 V at a fixed scan rate of 50 mV s−1 (curve b; Fig. 5B), resembling that of the neat NiO-modified GCE32. In this context, while the existence of WO42− polyanions in the NiWO4 composite helps to promote a higher electrical conductivity, the presence of NiO should play the key role for the observed redox behavior243334, which may be explained by the mechanism proposed by Wang et al.15:

Bottom Line: A facile hydrothermal route for the synthesis of ordered NiWO4 nanocrystals, which show promising applications as high performance non-enzymatic glucose sensor is reported.The NiWO4-modified electrodes showed excellent sensitivity (269.6 μA mM(-1 )cm(-2)) and low detection limit (0.18 μM) for detection of glucose with desirable selectivity, stability, and tolerance to interference, rendering their prospective applications as cost-effective, enzyme-free glucose sensors.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan.

ABSTRACT
A facile hydrothermal route for the synthesis of ordered NiWO4 nanocrystals, which show promising applications as high performance non-enzymatic glucose sensor is reported. The NiWO4-modified electrodes showed excellent sensitivity (269.6 μA mM(-1 )cm(-2)) and low detection limit (0.18 μM) for detection of glucose with desirable selectivity, stability, and tolerance to interference, rendering their prospective applications as cost-effective, enzyme-free glucose sensors.

No MeSH data available.


Related in: MedlinePlus