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研究的目的是利用银纳米粒作为关键材料制备出高效的基底用于表面增强拉曼光谱法检测农药残留,选择了有机硫农药中的福美双用于检测。银纳米在表面增强拉曼方面有着巨大的潜力,因为其纳米粒子在拉曼光谱的激发波长下很容易产生表面等离子共振。金电极是比较成熟的表面增强拉曼基底同时在辅助金属纳米结构方面也具有优良的表现。结合银纳米-金电极制备了一种新颖的表面增强拉曼基底。研究表明,银纳米-金电极(AgNPs-Au)结构对所选择的农药显示出很强的拉曼增强效果,AgNPs-Au结构对农药福美双检测的检测限为4.0×10~(-10) mol/L。银纳米-金电极复合结构在制备灵敏、轻质、灵活结构方面具有巨大的潜力,可用于表面增强拉曼应用到促进食品安全。
The purpose of the study was to use silver nanoparticle as the key material to prepare an efficient substrate for the surface-enhanced Raman spectroscopy to detect pesticide residues, and to select thiomers for the detection of thiomers. Silver nanomaterials have great potential for surface-enhanced Raman because their nanoparticles are prone to surface plasmon resonance at Raman excitation wavelengths. The gold electrode is a more mature surface-enhanced Raman substrate and also has excellent performance in supporting metallic nanostructures. A novel surface-enhanced Raman matrix was prepared with silver nano-gold electrode. The results show that AgNPs-Au structure shows a strong Raman enhancement effect on selected pesticides. The detection limit of AgNPs-Au structure on the pesticide thiram is 4.0 × 10 -10 mol / L. The silver nano-gold electrode composite has great potential for preparing sensitive, lightweight, flexible structures that can be used for surface-enhanced Raman applications to promote food safety.