The monolayer graphene-noble metallic nanostructure hybrid system with excellent optical characteristic, which is deserved pay attentions in the study of surface-enhanced Raman scattering spectroscopy. In this work, a hybrid sandwich structure is designed to transfer single-layer graphene to the surface of discs substrate covered by silver film and assembly of the dense Au nanoparticles (AuNPs). Blu-ray disc has a cycle density of approximately 5.7 times that of DVD-R due to the different storage capacities of these optical discs. In the research, enhancement effects have been explored for two different periodic grating structures. Compared to spectra of Si/G structure, Graphene Raman spectra from Blu-grating/AuNPs/G structure and Blu-grating/G/AuNPs enhancement multiples at the 2D peak position possesses different Raman responses of 1.09 and 2.51 times, respectively. The sandwich hybrid structure of Ag grating/graphene/AuNPs obtains a Raman enhancement factor (EF) of 6.2×10⁸ for Rhodamine 6G and surface-enhanced Raman Scattering(SERS) detection limit of 0.1 nM. These findings can be attributed to the electric field enhancement of the hybrid structure and the chemical enhancement of graphene. This study provides a new approach for SERS detection and offers a new technique for designing SERS sensors with grapheme-plasmon hybrid structures.

中文翻译：

---

等离子激子耦合，用于芯片上的纳米光子传感。

具有优异光学特性的单层石墨烯-贵金属纳米结构杂化体系在表面增强拉曼散射光谱研究中值得重视。在这项工作中，设计了一种混合夹心结构，以将单层石墨烯转移到被银膜覆盖的圆盘基材表面上，并组装致密的Au纳米颗粒（AuNPs）。由于这些光盘的存储容量不同，蓝光光盘的循环密度约为DVD-R的5.7倍。在研究中，已经探索了两种不同周期性光栅结构的增强效果。与Si / G结构的光谱相比，Blu-grating / AuNPs / G结构和2d峰位置处Blu-grating / G / AuNPs增强倍数的石墨烯拉曼光谱具有1.09和2的不同拉曼响应。分别是51次。Ag光栅/石墨烯/ AuNPs的三明治混合结构获得的拉曼增强因子（EF）为6.2×10⁸为若丹明6G和表面增强拉曼散射（SERS）检测为0.1nM的限制。这些发现可归因于杂化结构的电场增强和石墨烯的化学增强。这项研究为SERS检测提供了一种新方法，并为设计具有字素-等离激元混合结构的SERS传感器提供了一种新技术。