Cu has recently received great interest as a potential candidate for glucose sensing to overcome the problems with noble metals. In this work, reduced graphene oxide-encapsulated Cu nanoparticles ([email protected]) have been prepared via an electrostatic self-assembly method. This core/shell composites were found to be more stable than conventional Cu-decorated graphene composites and bare copper nanoparticles in an air atmosphere because the graphene shell can effectively protect the Cu nanoparticles from oxidation. In addition, the obtained [email protected] composites also showed an outstanding electrocatalytic activity toward glucose oxidation with a wide linear detection range of 1 μM to 2 mM, low detection limit of 0.34 μM (S/N = 3), and a sensitivity of 150 μA mM^–1 cm^–2. Moreover, [email protected] composites exhibited a satisfactory reproducibility, selectivity, and long effective performance. These excellent properties indicated that [email protected] nanoparticles have great potential application in glucose detection.

中文翻译：

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用于非酶葡萄糖传感的石墨烯封装铜复合材料的自组装

最近，铜作为葡萄糖传感的潜在候选者受到了极大的关注，以克服贵金属的问题。在这项工作中，通过静电自组装方法制备了还原氧化石墨烯封装的铜纳米粒子（[email protected]）。研究发现，这种核/壳复合材料在空气气氛中比传统的铜装饰石墨烯复合材料和裸铜纳米粒子更稳定，因为石墨烯壳可以有效保护铜纳米粒子免遭氧化。此外，所获得的[email protected]复合材料还对葡萄糖氧化表现出出色的电催化活性，具有1 μM至2 mM的宽线性检测范围、0.34 μM的低检测限（S/N = 3）和灵敏度150 μA mM ^–1 cm ^–2。此外，[电子邮件保护]复合材料表现出令人满意的再现性、选择性和长效性能。这些优异的特性表明[电子邮件保护]纳米颗粒在葡萄糖检测中具有巨大的潜在应用。