A non-enzymatic glucose sensor based on the use of CuO-Cu nanospheres placed on a TiO2 nanotube (TNT) array with excellent performance is described. The electrode was fabricated by coating the CuO-Cu nanospheres onto the TNT array through electrochemical deposition. The CuO-Cu nanospheres with a diameter of ~200 nm are well dispersed on the TNT surface, which warrants smooth interaction and a 3D nanostructure with high uniformity. The modified electrode was then used for amperometric determination of glucose in 0.1 M NaOH solution. Figures of merit include (a) a typical working voltage of 0.65 V (vs. Ag/AgCl). (b) a linear range as wide as from 0.2–90 mM, (c) good sensitivity (234 μA mM−1 cm−2), and a 19 nM lower detection limit. The sensor is selective over ascorbic acid (AA), dopamine (DA), uric acid (UA), lactose, sucrose, and fructose. Graphical abstract Graphical abstract

中文翻译：

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TiO2纳米管阵列上的CuO/Cu复合纳米球用于葡萄糖的电流检测

描述了一种基于使用放置在具有优异性能的 TiO2 纳米管 (TNT) 阵列上的 CuO-Cu 纳米球的非酶葡萄糖传感器。通过电化学沉积将 CuO-Cu 纳米球涂覆到 TNT 阵列上来制造电极。直径约 200 nm 的 CuO-Cu 纳米球很好地分散在 TNT 表面，这保证了平滑的相互作用和具有高均匀性的 3D 纳米结构。然后将修改后的电极用于对 0.1 M NaOH 溶液中的葡萄糖进行电流测定。品质因数包括 (a) 0.65 V 的典型工作电压（相对于 Ag/AgCl）。(b) 0.2-90 mM 的线性范围，(c) 良好的灵敏度（234 μA mM-1 cm-2），以及 19 nM 的检测下限。该传感器对抗坏血酸 (AA)、多巴胺 (DA)、尿酸 (UA)、乳糖、蔗糖和果糖具有选择性。