Plasmonic nanostructured silver silica at an optimum volume ratio of silver silica and constant concentration of silver nanoparticles (AgNPs) was successfully synthesized by the sol-gel technique for surface-enhanced Raman scattering (SERS) application. Transmission electron microscopy (TEM) images confirm that the optimum ratio of the nanostructures consists of SiO₂ particles partially penetrated and embedded by the Ag NPs with a mean particle size of 35 nm, which are homogeneous and spherical in shape. UV–vis spectroscopy of the optimum ratio shows that the intensity of the Ag–SiO₂NCs peak is greatly reduced with a clear and sharp absorption peak. 4-Aminobenzenethiol (4-ABT) as the probe molecule greatly enhances the SERS signal. The results from different pH values confirm that the substrate is stable and gives the strongest SERS enhancements in a highly alkaline environment.

通过溶胶-凝胶技术成功地在表面增强拉曼散射（SERS）应用中成功合成了等离子纳米结构化银二氧化硅，该银纳米粒子具有最佳的硅二氧化硅体积比和恒定浓度的银纳米颗粒（AgNPs）。透射电子显微镜（TEM）图像证实，纳米结构的最佳比例包括被平均粒径为35 nm的Ag NPs部分穿透和嵌入的SiO ₂颗粒组成。最佳比例的紫外可见光谱表明，Ag-SiO ₂的强度清晰而尖锐的吸收峰大大降低了NCs峰。作为探针分子的4-氨基苯硫醇（4-ABT）大大增强了SERS信号。来自不同pH值的结果证实了底物是稳定的，并且在强碱性环境中具有最强的SERS增强作用。