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Ni(OH)(2)@Cu dendrite structure for highly sensitive glucose determination

机译：Ni（OH）（2）@Cu枝晶结构用于高灵敏度葡萄糖测定

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摘要

Fast and accurate monitoring of glucose levels in various fields has attracted increasing attention in recent years. In this study, a nickel hydroxide-coated copper dendrite structure [Ni(OH)(2)@Cu] was prepared by a facile two-step electrodeposition on a gold substrate and was used as a non-enzymatic glucose sensor. The surface morphology of the Ni(OH)(2)@Cu dendrite structure was characterized by scanning electron microscopy and elemental mapping, and its composition was confirmed by X-ray diffraction and X-ray photoelectron spectroscopy. Due to the large surface area of the dendrite structure, the as-prepared sensor demonstrated a high electrocatalytic activity towards the oxidation of glucose in alkaline solution. Following analysis of the optimum deposition and sensing conditions, the developed sensor showed a high sensitivity of 2082 mu A mM(-1) cm(-2) over a wide linear range of 1-4500 mu M, as well as a low detection limit of 0.24 mu M (S/N = 3) with a rapid response time of 2 s. This sensor can also reliably measure glucose concentration in human urine samples, indicating its use as a promising glucose sensor.
机译：近年来，在各个领域中快速，准确地监测葡萄糖水平已引起越来越多的关注。在这项研究中，通过在金基底上方便的两步电沉积制备了氢氧化镍涂层的铜枝晶结构[Ni（OH）（2）@Cu]，并将其用作非酶葡萄糖传感器。 Ni（OH）（2）@Cu枝晶结构的表面形貌通过扫描电子显微镜和元素图谱表征，并通过X射线衍射和X射线光电子能谱确认其组成。由于枝晶结构的表面积大，因此所制备的传感器表现出对碱性溶液中葡萄糖氧化的高电催化活性。在对最佳沉积和感测条件进行分析之后，开发的传感器在1-4500μM的宽线性范围内显示了2082μAmM（-1）cm（-2）的高灵敏度，并且检测限低0.24μM（S / N = 3），响应时间为2 s。该传感器还可以可靠地测量人尿液样品中的葡萄糖浓度，表明它可以用作有希望的葡萄糖传感器。

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