基于SERS技术的微量食品添加剂高灵敏检测方法  

High Sensitive Detection Method of Micro Food Additives Based on the SERS Technology

作　　者：夏美晶 郭浩[1] 唐军[1] 刘俊[1] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室

出　　处：《微纳电子技术》2018年第3期194-200,共7页Micronanoelectronic Technology

基　　金：国家自然科学基金资助项目(51727808,51635011,51775522)

摘　　要：提出一种基于表面增强喇曼散射（SERS）效应的高灵敏、快捷、便携式的微量食品添加剂检测方法。采用光纤球结构,设计研发了一种光纤球结构表面包覆银纳米颗粒的高灵敏便携式SERS信号检测探针,并利用parylene-C纳米薄膜包覆银纳米结构,实现了该探针的可重复性应用及测试。实验中,激光从光纤探针末端输入,激发探针表面银纳米结构从而增强食品添加剂的喇曼信号,然后通过光纤球聚集喇曼信号,并从光纤末端收集测试喇曼信号,实现了对浓度为10-12 mol/L的微量R6G分子的检测,并实现了对常用食品中食品添加剂的检测。此探针具有便携、高效、快速、高灵敏检测特性,能够得到广泛应用,从而提高对食品安全的检测能力。A highly sensitive,fast and portable detection method for the micro food additives based on surface-enhanced Raman scattering（SERS）effect was proposed.Using the fiber ball structure,a highly sensitive and portable SERS signal detection probe based on the fiber ball structure coated with the silver nanoparticles was designed and developed.The parylene-C nanofilm was coated on the silver nanostructure to achieve the repeatability application and test of the probe.In the experiment,when the laser was inputted from the fiber probe end,the silver nanostructure on the probe surface was excited to enhance the Raman signals of the food additives.Then the Raman signals were gathered by the fiber ball,and were collected and tested through the end of the fiber probe.The detection of the micro R6 G molecular with the concentration of10-12 mol/L was realized,and the detection of the food additives in usual food was also realized.This probe has the portability,high efficiency,rapidity,high sensitive detection characteristics,and can be widely used to improve the detection ability of the food safety.

关 键 词：表面增强喇曼散射(SERS)技术 食品添加剂 银纳米颗粒 食品安全 光纤探针 

分 类 号：TH741[机械工程—光学工程]