硅基金纳米基底的制备及在拉曼检测中的应用

The preparation of silicon-based gold nanoparticles substrate and its application in Raman detection

单晶硅通过碱性溶液腐蚀制备有序的金字塔结构,采用磁控溅射法在硅基金字塔表面镀上一定厚度的金膜,作为表面增强拉曼散射活性基底。采用扫描电镜和紫外-可见分光光度计表征样品的表面形貌和光学性质。以亚甲基蓝为探针分子,检测到更多的拉曼特征峰。通过改进硅基金纳米基底,检测到了三聚氰胺和农药联苯肼酯的拉曼光谱。实验结果表明,制备出的硅基金纳米基底在食品安全和农药检测有潜在的应用前景。

Monocrystalline silicon is etched by alkaline solution to prepare an ordered pyramid structure.A certain thickness of gold film is plated on the surface of the silicon-based pyramid by magnetron sputtering as a surface-enhanced Raman scattering active substrate.The surface morphology and optical properties of the samples were characterized by SEM and UV-Vis spectrophotometer.With methylene blue as the probe molecule,more Raman characteristic peaks were detected.Raman spectra of melamine and pesticide diphenoquinone were detected by improving silicon fund nanosubstrate.The experimental results show that the prepared silicon fund nanosubstrate has potential application prospects in food safety and pesticide detection.