Construction of pure worm-like AuAg nanochains for ultrasensitive SERS detection of pesticide residues on apple surfaces
Construction of pure worm-like AuAg nanochains for ultrasensitive SERS detection of pesticide residues on apple surfaces
复制标题
纯蠕虫状金银纳米链的构建用于苹果表面农药残留的超灵敏SERS检测
DOI：
10.1016/j.saa.2018.10.051
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发表时间：
2019-02-15
影响因子：
4.4
通讯作者：
Chen, Ming
中科院分区：
文献类型：
--
作者：
Jiao, Anxin;Dong, Xuejian;Chen, Ming
利用表面增强拉曼光谱（Sers）技术对农产品中的农药残留进行超灵敏检测，在食品安全领域具有重要意义。在此，蠕虫状的AuAg纳米链与高度互连的超细（类似于6.2 nm）的纳米粒子被开发作为一个优秀的Sers纳米传感器通过激光辅助策略。苹果表面福美双分子的Sers检测限约为10（-7）M（0.03 ppm），比美国环境保护署（EPA）规定的水果中最大残留限量（MRL，7 ppm）低约200倍。重要的是，Sers强度和福美双浓度之间建立良好的线性关系，可以灵敏地监测农业中农药残留的微小变化。(C)2018爱思唯尔B. V.保留所有权利。
Ultrasensitive detection of pesticide residues on agricultural products using surface-enhanced Raman spectroscopy (SERS) is of significant interest in food security. Herein, worm-like AuAg nanochains with highly interconnected ultrafine (similar to 6.2 nm) bimetallic particles were developed as an excellent SERS nanosensor via laser-assisted strategy. The SERS detection limit of thiram molecules on apple surfaces is about 10(-7) M (0.03 ppm), which is about 200 times lower than the maximal residue limit (MRL, 7 ppm) in fruit prescribed by the U.S. Environmental Protection Agency (EPA). Importantly, the established excellent linear relationships between the SERS intensities and thiram concentrations can sensitively monitor the slight variation of pesticide residues in agriculture. (C) 2018 Elsevier B.V. All rights reserved.