中文摘要：二硫代氨基甲酸酯是广泛应用于水果、蔬菜和成熟作物中防治真菌的农药，但其残留可能会对人类身体健康造成威胁。因此，本文开发了一个用于检测二硫代氨基甲酸酯残留的表面增强拉曼散射传感器，表面增强拉曼散射可以提供农药残留特殊光谱并且不必在传感器中使用分子识别探针，为了获取更高的灵敏度、更强的抗干扰能力和鲁棒性，本文设计了一个还原氧化石墨烯包裹的银纳米粒子海绵，当基质中同时含有二硫代氨基甲酸酯和芳香杀虫剂时，还原氧化石墨烯包裹的银纳米粒子海绵可以选择性的识别二硫代氨基甲酸酯，避免芳香杀虫剂对表面增强拉曼散射信号的干扰。以还原氧化石墨烯包裹的银纳米粒子为衬底的海绵表面增强拉曼散射光谱在二硫代氨基甲酸酯弄残留检测方面具有巨大的潜力。
 
外文摘要：Dithiocarbamate (DTC) pesticides are widely used for fruits, vegetables, and mature crops to control fungal diseases. Their residues in food could pose a threat to human health. Therefore, a surface-enhanced Raman scattering-based (SERS-based) sensor is developed to detect DTC pesticides because SERS can provide the characteristic spectrum of pesticides and avoid the use of a molecular recognition probe in the sensor. For the acquisition of high sensitivity, good anti-interference ability, and robustness of the SERS sensor, a silver nanocube reduced graphene oxide (AgNC-rGO) sponge is devised. In the AgNC-rGO sponge, the rGO sheets form a porous scaffold that physically holds the AgNCs, which create narrow gaps between the neighboring AgNCs, leading to the formation of "hot spots" for SERS-signal amplification. When DTC pesticides coexist with aromatic pesticides in a sample matrix, the AgNC-rGO sponge can selectively detect DTC pesticides because of the preferential adsorption of DTC pesticides on the Ag surface and aromatic pesticides on the rGO surface, which can effectively eliminate the interference of the SERS signals of aromatic pesticides, and facilitate the qualitative and quantitative analysis of DTC pesticides.. The AgNC-rGO sponge shows great potential as a SERS substrate for selective detection of DTC pesticides.
外文关键词：surface-enhanced Raman scattering, dithiocarbamate, silver nanocube, reduced graphene oxide, surface plasmon resonance
作者：Zhu, Chuhong; Wang, Xiujuan; Sho, Xiaofei; Yang, Feng; Meng, Guowen;Xiong, Qizhong; Ke, Yan; Wang, Hua; Lu, Yilin; Wu, Nianqiang
作者单位：Chinese Acad Sci, Key Lab Mat Phys, CAS Ctr Excellence Nanosci, Hefei 230031, Anhui, Peoples R China.
期刊名称：ACS APPLIED MATERIALS & INTERFACES
期刊影响因子：7.504
出版年份：2017
出版刊次：45
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