The assembly of 3D nanoscale structures of plasmonic nanoparticles (NPs) holds great promise for achieving enhanced optical and electronic properties. This type of materials exhibits a large number of surface hot spots, while offering the possibility for synergetic effects to be observed. Herein, a facile, yet powerful, strategy to fabricate 3D mesoporous networks of copper NPs decorated with graphite layers (denoted as Cu/G) is demonstrated by using a polymer-assisted self-assembly method. After thermal processing, the resulting Cu/G-linked networks retain an open and interconnected porosity with a large surface area (up to 90 m2  g-1 ) and narrow pore size distribution (ca. 4.3 nm in size). Owing to these characteristics, Cu/G assemblies behave as high-performance surface-enhanced Raman scattering (SERS) probes for the detection of analytes in very low concentrations. The substrates comprise low-cost, environmentally benign materials and show promise for chemical and biological sensing applications.

中文翻译：

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石墨层修饰的介孔铜纳米粒子网络，用于痕量分析物的表面增强拉曼散射检测。

等离子体纳米粒子（NPs）的3D纳米尺度结构的组装对于实现增强的光学和电子特性具有广阔的前景。这种类型的材料表现出大量的表面热点，同时提供了观察到协同效应的可能性。在本文中，通过使用聚合物辅助自组装方法展示了一种简便而强大的策略，该策略可制造装饰有石墨层（表示为Cu / G）的铜NP的3D中孔网络。热处理后，所得的与Cu / G连接的网络保留了具有大表面积（最大90 m2 g-1）和狭窄的孔径分布（大小约为4.3 nm）的开放且互连的孔隙率。由于这些特征，Cu / G组件可充当高性能表面增强拉曼散射（SERS）探针，用于检测极低浓度的分析物。基板包括低成本，对环境无害的材料，并显示出对化学和生物传感应用的希望。