Abstract
The authors describe a template-free method for the electrodeposition of ultra-long copper nanowires on titanium foils. Scanning electron microscopy shows that the nanowires are around 50 nm in diameter and 30 μm in length. The titanium foils enable nonenzymatic sensing of glucose in 0.1 M NaOH solution because the nanowire-modified electrodes exhibit excellent electrocatalytic activity towards glucose oxidation at a typical working voltage of 0.7 V (vs. Ag/AgCl). Figures of merit include (a) a sensitivity of 4985 μA·mM−1·cm−2, (b) a linear response extending from 1 μM to 6.0 mM of glucose, (c) good reusability (a 2.5% relative standard deviation of one electrode in five detections), and (d) an excellent reproducibility (a 3.3% RSD of five electrodes to one sample).
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Acknowledgements
This work was supported by the National Science Foundation of China (NSFC) (NO. 21203044, 31470489) and Fundamental Research Funds for the Central Universities (HIT. IBRSEM. A. 201407).
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Zhang, L., Ding, Y., Li, R. et al. Electrodeposition of ultra-long copper nanowires on a titanium foil electrode for nonenzymatic voltammetric sensing of glucose. Microchim Acta 184, 2837–2843 (2017). https://doi.org/10.1007/s00604-017-2279-z
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DOI: https://doi.org/10.1007/s00604-017-2279-z