Laser-induced atmospheric CuxO formation on copper surface with enhanced electrochemical performance for non-enzymatic glucose sensing,Journal of Materials Chemistry C

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Laser-induced atmospheric CuxO formation on copper surface with enhanced electrochemical performance for non-enzymatic glucose sensing
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2021-07-29 , DOI: 10.1039/d1tc01289d
Sotoudeh Sedaghat _{1,

2} , Sina Nejati _{1,

2} , Luis Helena Bermejo _{1,

2} , Zihao He ₃ , Alejandro M. Alcaraz ₁ , Alexander Roth _{1,

4} , Zheng Li ₅ , Vilas G. Pol ₅ , Haiyan Wang _{1,

2,

3} , Rahim Rahimi _{1,

2}

Affiliation

Copper oxide nanostructures are widely used for various applications due to their unique optical and electrical properties. In this work, we demonstrate an atmospheric laser-induced oxidation technique for the fabrication of highly electrochemically active copper oxide hierarchical micro/nano structures on copper surfaces to achieve highly sensitive non-enzymatic glucose sensing performance. The effect of laser processing power on the composition, crystallinity, microstructure, wettability, and color of the laser-induced oxide on copper (LIO-Cu) surface was systematically studied using scanning electron microscopy (SEM), grazing incidence X-ray diffraction (GI-XRD), Raman spectroscopy, energy dispersive X-ray spectroscopy (EDX), EDX-mapping, water contact angle measurements, and optical microscopy. Results of these investigations showed a remarkable increase in copper oxide composition by increasing the laser processing power. The pore size distribution and surface area of the pristine and LIO-Cu sample estimated by N₂ adsorption–desorption data showed a developed mesoporous LIO-Cu structure. The size of the generated nano-oxides, crystallinity, and electroactivity of the LIO-Cu were observed to be adjustable by the laser processing power. The electrocatalytic activity of LIO-Cu surfaces was studied by means of cyclic voltammetry (CV) within a potential window of −0.8 to +0.8 V and chronoamperometry in an applied optimized potential of +0.6 V, in 0.1 M NaOH solution and phosphate buffer solution (PBS), respectively. LIO-Cu surfaces with optimized laser processing powers exhibited a sensitivity of 6950 μA mM⁻¹ cm⁻² within a wide linear range from 0.01 to 5 mM, with exceptional specificity and response time (<3 seconds). The sensors also showed excellent response stability over a course of 50 days that was originated from the binder-free robust electroactive film fabricated directly onto the copper surface. The demonstrated one-step LIO processing onto commercial metal films, can potentially be applied for tuneable and scalable roll-to-roll fabrication of a wide range of high surface area metal oxide micro/nano structures for non-enzymatic biosensing and electrochemical applications.

中文翻译：

铜表面激光诱导大气 CuxO 形成具有增强的非酶葡萄糖传感电化学性能

氧化铜纳米结构由于其独特的光学和电学特性而被广泛用于各种应用。在这项工作中，我们展示了一种大气激光诱导氧化技术，用于在铜表面制造高电化学活性氧化铜分级微/纳米结构，以实现高灵敏度的非酶葡萄糖传感性能。使用扫描电子显微镜 (SEM)、掠入射 X 射线衍射系统研究了激光加工功率对铜 (LIO-Cu) 表面激光诱导氧化物的成分、结晶度、微观结构、润湿性和颜色的影响。 GI-XRD)、拉曼光谱、能量色散 X 射线光谱 (EDX)、EDX 映射、水接触角测量和光学显微镜。这些研究的结果表明，通过增加激光加工功率，氧化铜的成分显着增加。通过 N 估算的原始和 LIO-Cu 样品的孔径分布和表面积₂吸附-解吸数据显示出发达的介孔 LIO-Cu 结构。观察到生成的纳米氧化物的尺寸、结晶度和 LIO-Cu 的电活性可通过激光加工功率进行调节。LIO-Cu 表面的电催化活性通过循环伏安法 (CV) 在 -0.8 至 +0.8 V 的电位窗口内和计时电流法在 +0.6 V 的应用优化电位、0.1 M NaOH 溶液和磷酸盐缓冲溶液中进行研究(PBS)，分别。具有优化激光加工能力的 LIO-Cu 表面的灵敏度为 6950 μA mM^-1 cm^-2在 0.01 至 5 mM 的宽线性范围内，具有出色的特异性和响应时间（<3 秒）。这些传感器在 50 天的过程中还表现出出色的响应稳定性，这是由于直接在铜表面上制造的无粘合剂的坚固电活性膜。在商业金属薄膜上展示的一步 LIO 处理可潜在地应用于可调节和可扩展的卷对卷制造，用于非酶生物传感和电化学应用的各种高表面积金属氧化物微/纳米结构。

更新日期：2021-09-08

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