Developing well-defined surface enhanced Raman scattering (SERS)-active substrates with superior performance is potentially attractive for many areas of research such as new generation sensing and analysis. Here, a nanohybrid SERS platform has been developed by decorating two-dimensional (2D) tungsten diselenide (WSe₂) flakes with zero-dimensional (0D) plasmonic gold nanoparticles (Au NPs). The morphology studies showed that under optimal conditions densely populated Au NPs were formed on the WSe₂ surface. Here, we report the utility of the Au NPs/WSe₂ nanohybrid structure as an efficient SERS substrate by performing concentration-dependent SERS measurements of a highly fluorescent molecule (Rhodamine 6G, R6G). The hybrid substrate displays promising SERS activity with the detection limit as low as 1 × 10^–9 M, which is several orders of magnitude higher than the bare WSe₂ on its own (10^-3 M). The substrate also exhibits reliable signal stability and reproducibility. These results indicate that the nanohybrid structure has great potential in SERS applications.

开发具有卓越性能的定义明确的表面增强拉曼散射 (SERS) 活性基板对于诸如新一代传感和分析等许多研究领域具有潜在的吸引力。在这里，通过用零维 (0D) 等离子体金纳米粒子 (Au NPs)装饰二维 (2D) 二硒化钨 (WSe _{2 ) 薄片，开发了一种纳米混合 SERS 平台。形态学研究表明，在最佳条件下，在WSe 2}表面上形成了密集分布的Au NP 。在这里，我们报告了 Au NPs/WSe _2的效用通过对高荧光分子（罗丹明 6G、R6G）进行浓度依赖性 SERS 测量，将纳米杂化结构作为有效的 SERS 底物。混合基板显示出有前景的 SERS 活性，检测限低至 1 × 10 ^–9 M，比单独的裸 WSe ₂ (10 ^-3 M) 高几个数量级。该底物还表现出可靠的信号稳定性和重现性。这些结果表明纳米杂化结构在 SERS 应用中具有巨大的潜力。