Through a replacement reaction approach, Ag nanostructure was easily prepared on economical digital video disc (DVD) and polydimethysiloxane (PDMS) with surface structure duplicating from the former. Distinct nanoscale morphology was observed, featuring intersecting Ag nanoplates with abundant hot spots on the DVD and spherical Ag nanoparticles on the PDMS. Surface-enhanced Raman scattering (SERS) spectra, using crystal violet as a probe, revealed a superior enhancement effect in Ag/DVD versus that in Ag/PDMS. Considering the desirable flexibility and transparency of PDMS for in situ detection, we further developed a protocol to introduce intersecting Ag nanoplates onto the PDMS surface. The resulting Ag/PDMS substrate was endowed with remarkable sensitivity, excellent uniformity and good stability under mechanical bending. Furthermore, effective in situ detection of malachite green on fish was demonstrated, highlighting the great potential of our approach for the in situ detection of target molecules on a curved surface.

中文翻译：

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高密度热点Ag/PDMS基板的制备及其在原位检测中的应用

通过置换反应方法，Ag纳米结构很容易在经济的数字视频光盘（DVD）和聚二甲基硅氧烷（PDMS）上制备，表面结构与前者相同。观察到不同的纳米级形态，具有交叉的 Ag 纳米板，在 DVD 上具有大量热点，在 PDMS 上具有球形 Ag 纳米颗粒。使用结晶紫作为探针的表面增强拉曼散射 (SERS) 光谱显示，与 Ag/PDMS 相比，Ag/DVD 具有更好的增强效果。考虑到 PDMS 所需的灵活性和透明度，原位检测，我们进一步开发了一种协议，将相交的银纳米板引入 PDMS 表面。得到的 Ag/PDMS 基板在机械弯曲下具有显着的灵敏度、优异的均匀性和良好的稳定性。此外，有效原位证明了在鱼身上检测到孔雀石绿，突显了我们方法的巨大潜力原位检测曲面上的目标分子。