材料科学
检出限
罗丹明6G
拉曼散射
纳米技术
纳米颗粒
农药残留
分析化学(期刊)
拉曼光谱
色谱法
杀虫剂
光学
化学
物理
荧光
生物
农学
作者
Congshan Zhu,Qiang Zhao,Guowen Meng,Xiujuan Wang,Xiaoye Hu,Fangming Han,Yong Lei
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2020-03-02
卷期号:31 (20): 205303-205303
被引量:25
标识
DOI:10.1088/1361-6528/ab7100
摘要
It is of great significance to develop a simple and effective method for constructing large-scale high-quality surface-enhanced Raman scattering (SERS) substrate. Here, an Ag nanoparticle-assembled micro-bowl array was prepared by a close-packed polystyrene (PS) sphere monolayer templated electrodeposition approach. The fabricated Ag nanoparticle-assembled micro-bowl array shows high SERS sensitivity to rhodamine 6G (R6G) under an ultra-low concentration of 1 fM, and exhibits excellent SERS spectral uniformity with a small relative standard deviation (RSD) of 7.6% and good reproducibility (a RSD ∼8.2% for the average peak intensities from different batches of SERS substrates). The fabricated micro-bowl array SERS substrate was employed to detect pesticide residue (thiram and methyl parathion) on vegetables. The limit of detections (LODs) for the two pesticides are lower than the maximum residue limits (MRLs) set by the European Union respectively, showing promising application in rapid inspection of food safety.
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