Template-free synthesis of SERS-active gold nanopopcorn for rapid detection of chlorpyrifos residues
Template-free synthesis of SERS-active gold nanopopcorn for rapid detection of chlorpyrifos residues
复制标题
无模板合成SERS活性金纳米爆米花用于快速检测毒死蜱残留
DOI：
10.1016/j.snb.2016.11.021
复制
发表时间：
2017-03-31
影响因子：
8.4
通讯作者：
Yang, Haifeng
中科院分区：
文献类型：
--
作者：
Xu, Qin;Guo, Xiaoyu;Yang, Haifeng
毒死蜱是一种广谱的有机磷杀虫剂，在农业上应用广泛。然而，毒死蜱在食物和水中的残留对人类健康构成潜在风险。本工作在温和的条件下合成了爆米花状的金纳米粒子，并将其作为表面增强拉曼光谱（SERS）活性基底，利用便携式拉曼光谱仪对毒死蜱进行了检测。该基底具有极低的背景信号，并由于金纳米爆米花尖端之间形成的“热点”而显著增强了用于检测水果样品中痕量毒死蜱残留的Sers信号。结果表明，该传感器系统对毒死蜱的检测限为1 μ M，符合国家标准要求。(C)© 2016 Elsevier B.V.版权所有。
Chiorpyrifos, one of the broad-spectrum organophosphorus insecticides, is utilized extensively in agriculture. However, chlorpyrifos residues in food and water pose potential risks to human health. In this work, popcorn-like gold nanoparticles were synthesized under mild condition without any surfactant as template and serviced as SERS-active substrate for sensing chlorpyrifos by using a portable Raman spectrometer. The obtained substrate had extremely low background signal and remarkably enhanced SERS signal for detecting trace chlorpyrifos residues in fruit samples due to the "hot spots" formed between tips of gold nanopopcorns. As a result, the portable SERS-sensor system had a limit of detection at 1 mu M of chlorpyrifos, which met the requirement of national standard. (C) 2016 Elsevier B.V. All rights reserved.