Abstract A new substrate composing of Ag nanoflowers on graphene@Cu net (AgNFs/G@Cu) was fabricated on the flexible woven copper net. Graphene, an ideal 2D plane, provides better dispersion of regular electrodeposited AgNFs arrays. Graphene nanogap was used to enhance the EM coupling between AgNFs and metal Cu substrate. Regular AgNFs arrays offer denser “hotspots”, which further enhance the EM coupling. High sensitivity (rhodamine 6G (R6G): 10−14 M, crystal violet (CV): 10−12 M) and good homogeneity are realized in our experiment and proved by the COMSOL simulation. Cu net, remarkable flexibility and practicality, allows for a close contact to the sample surface by swabbing. Malachite green (MG) as low as 10−11 M on the surface of the marine fish can be detected. This work may offer novel and practical SERS applications in the areas of pesticide residue, food security and biotechnology.

中文翻译：

---

石墨烯纳米间隙在作为柔性基板的编织铜网上电沉积 AgNFs 的作用及其在 SERS 中的应用

摘要 在柔性编织铜网上制备了一种由石墨烯@Cu 网（AgNFs/G@Cu）上的银纳米花组成的新型基板。石墨烯是一种理想的 2D 平面，可以更好地分散常规电沉积 AgNFs 阵列。石墨烯纳米间隙用于增强 AgNFs 和金属 Cu 基板之间的 EM 耦合。常规 AgNF 阵列提供更密集的“热点”，这进一步增强了 EM 耦合。在我们的实验中实现了高灵敏度（罗丹明 6G (R6G)：10-14 M，结晶紫 (CV)：10-12 M）和良好的均匀性，并通过 COMSOL 模拟证明。铜网，具有非凡的灵活性和实用性，允许通过擦拭与样品表面紧密接触。可以检测到海鱼表面低至 10-11 M 的孔雀石绿 (MG)。