Abstract
In this study, copper/nickel (CuNi) particle decorated multiwalled carbon nanotubes (MWCNTs) have been fabricated for nonenzymatic glucose detection by the electrodeposition of CuNi particles on a glassy carbon electrode (GCE) modified with Nafion-functionalized MWCNTs (fMWCNTs). Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses reveal that CuNi particles were successfully deposited on the fMWCNTs/GCE. The as-synthesized CuNi/fMWCNT composite reveals the shape characteristics of dendrite with a Cu/Ni atomic ratio of around 88.1/11.9. The nonenzymatic glucose sensor based on CuNi/fMWCNT composite shows excellent electrocatalytic activity toward glucose oxidation with a high sensitivity (1470.2 μA cm−2 mM−1), a low detection limit (2.5 nM, signal/noise (S/N) ratio = 3), and a wide linear range (0.1–5000 μM). Moreover, the sensor has been successfully used for the assay of glucose in human serum samples with good recovery, ranging from 95.6 to 100.1 %. These results indicate that CuNi/fMWCNT composite is an ideal candidate for novel nonenzymatic glucose sensor because of its high sensitivity, good selectivity, good stability, and low cost.
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Acknowledgments
Financial support from Program for NSFC (51272219), RFDP (20124301110006), International Joint Research Program of Hunan Province (2013WK3036), Open Project of Hunan Provincial University Innovation Platform (12 K050), and the Construct Program of the Key Discipline in Hunan Province is greatly acknowledged.
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Yi, W., Liu, J., Chen, H. et al. Copper/nickel nanoparticle decorated carbon nanotubes for nonenzymatic glucose biosensor. J Solid State Electrochem 19, 1511–1521 (2015). https://doi.org/10.1007/s10008-015-2766-2
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DOI: https://doi.org/10.1007/s10008-015-2766-2