Au₁₀Cu₉₀ and Au₇₆Cu₂₄ nanoparticles (NPs) were directly fabricated on a glass substrate by spark discharge deposition technique. The prepared NPs were characterized by FE-SEM, and XPS techniques. The substrate composition was controlled by simply changed the electrode type that connected to a high voltage power supply. The generated substrates were evaluated of surface-enhanced Raman scattering (SERS) by using crystal violet as a molecular probe. The Au₇₆Cu₂₄ substrate showed the highest SERS signals, with a limit of detection could reach to 1 × 10⁻¹² M, and enhancement factor of 2.8 × 10⁸. The high SERS performance of this substrate could be attributed to the high electromagnetic field generated between the connected networking NPs and the chemical enhancement provided by the small amount of CuO.

中文翻译：

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用于表面增强拉曼散射的 au/cu 纳米颗粒的火花放电沉积

Au ₁₀ Cu ₉₀和Au ₇₆ Cu ₂₄纳米粒子(NP)通过火花放电沉积技术直接制造在玻璃基板上。制备的纳米颗粒通过 FE-SEM 和 XPS 技术进行表征。通过简单地改变连接到高压电源的电极类型来控制基板组成。通过使用结晶紫作为分子探针，对生成的基板进行表面增强拉曼散射 (SERS) 评估。Au ₇₆ Cu ₂₄底物显示出最高的 SERS 信号，检测限可达 1 × 10 ^-12  M，增强因子为 2.8 × 10 ⁸. 该基板的高 SERS 性能可归因于连接网络 NP 之间产生的高电磁场和少量 CuO 提供的化学增强。