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Preparation of SERS Substrate with Ag Nanoparticles Covered on Pyramidal Si Structure for Abamectin Detection
Plasmonics ( IF 3 ) Pub Date : 2021-06-10 , DOI: 10.1007/s11468-021-01386-w
Nguyen Huu Ke , Dao Anh Tuan , Tran Tri Thong , Nguyen Hoang Long , Nguyen Ha Thanh , Le Vu Tuan Hung

In this study, a surface-enhanced Raman scattering (SERS) substrate based on uniform silver nanoparticles/pyramidal silicon arrays (Ag NPs/PSi) is prepared by combining of wet etching processes and magnetron sputtering method. The average size of the Ag NPs is about 30–50 nm and uniform distribution on the surface of the PSi which are beneficial to the sensitivity and stability of the SERS signal. For R6G probe, a significant enhancement has been obtained even for the lowest concentration of 10−10 M. For abamectin detection, the Ag NPs/PSi substrate has exhibited sensitivity as low concentration as 1 ppm. The vibration peaks of abamectin molecules are firstly identified and investigated.



中文翻译:

用于阿维菌素检测的金字塔形硅结构包覆银纳米粒子的 SERS 基板的制备

在这项研究中,通过结合湿蚀刻工艺和磁控溅射方法制备了基于均匀银纳米颗粒/锥体硅阵列(Ag NPs/PSi)的表面增强拉曼散射(SERS)衬底。Ag NPs 的平均尺寸约为 30-50 nm,均匀分布在 PSi 表面,有利于 SERS 信号的灵敏度和稳定性。对于 R6G 探针,即使在 10 -10  M的最低浓度下也获得了显着的增强。对于阿维菌素检测,Ag NPs/PSi 底物已表现出低至 1 ppm 的灵敏度。首先对阿维菌素分子的振动峰进行了鉴定和研究。

更新日期:2021-06-11
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