Bimetallic nanomaterials, which exhibit a combination of the properties associated with two different metals, have enabled innovative applications in nanoscience and nanotechnology. Here, we introduce the fabrication of dendritic Au/Ag bimetallic nanostructures for surface-enhanced Raman scattering (SERS) and catalytic applications. The dendritic Au/Ag bimetallic nanostructures were prepared by combining the electrochemical deposition and replacement reaction. The formation of Au nanoparticle shell on the surface of Ag dendrites greatly improves the stability of dendritic nanostructures, followed by a significant SERS enhancement. In addition, these dendritic Au/Ag bimetallic nanostructures are extremely efficient in degrading 4-nitrophenol (4-NP) compared with the initial dendritic Ag nanostructures. These experimental results indicate the great potential of the dendritic Au/Ag bimetallic nanostructures for the development of excellent SERS substrate and highly efficient catalysts.

中文翻译：

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改进的基于Ag树突的树枝状Au / Ag双金属纳米结构的SERS性能和催化活性。

具有与两种不同金属相关的特性组合的双金属纳米材料已经在纳米科学和纳米技术中实现了创新应用。在这里，我们介绍了用于表面增强拉曼散射（SERS）和催化应用的树枝状Au / Ag双金属纳米结构的制造。结合电化学沉积和置换反应制备了枝状金/银双金属纳米结构。在Ag树枝状晶体表面上形成Au纳米粒子壳大大改善了树枝状纳米结构的稳定性，随后显着增强了SERS。另外，与最初的树枝状Ag纳米结构相比，这些树枝状Au / Ag双金属纳米结构在降解4-硝基苯酚（4-NP）方面极为有效。