Developing well-defined nanostructures with superior surface-enhanced Raman scattering (SERS) performance is a critical and highly desirable goal for the practical applications of SERS in sensing and analysis. Here, a SERS-active substrate was fabricated by decorating a MoS₂ monolayer with Ag nanowire (NW) and nanoparticle (NP) structures, using a spin-coating method. Both experimental and theoretical results indicate that strong SERS signals of rhodamine 6G (R6G) molecules can be achieved at “hotspots” formed in the Ag NW-Ag NP-MoS₂ hybrid structure, with an enhancement factor of 10⁶. The SERS enhancement is found to be strongly polarization dependent. The fabricated SERS substrate also exhibits ultrasensitive detection capabilities with a detection limit of 10^–11 M, as well as reliable reproducibility and good stability.

中文翻译：

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Ag纳米线/纳米粒子修饰的MoS 2单层，用于表面增强拉曼散射应用

开发具有出色的表面增强拉曼散射（SERS）性能的明确定义的纳米结构，对于SERS在传感和分析中的实际应用是至关重要的且非常理想的目标。在此，通过使用旋涂法通过用Ag纳米线（NW）和纳米颗粒（NP）结构装饰MoS ₂单层来制造SERS活性基板。实验和理论结果均表明，在Ag NW-Ag NP-MoS ₂杂化结构中形成的“热点”处，可以实现若丹明6G（R6G）分子的强SERS信号，增强因子为10 ⁶。发现SERS增强是强烈偏振相关的。制成的SERS基板还具有超灵敏的检测功能，检测极限为10 – ¹¹ M，并且具有可靠的重现性和良好的稳定性。