Ag@Au核壳SERS基底的优化设计  

Ag@Au optimal design of core-shell SERS substrate

作　　者：邸志刚 周昊 贾春荣 刘花菊 刘继腾 李金鑫 DI Zhigang;ZHOU Hao;JIA Chunrong;LIU Huaju;LIU Jiteng;LI Jinxin(College of Electrical Engineering,North China University of Science and Technology,Tangshan Hebei 063210,China)

机构地区：[1]华北理工大学电气工程学院,河北唐山063210

出　　处：《激光杂志》2022年第6期41-45,共5页Laser Journal

基　　金：国家973计划(No.2010CB327801);河北省食品药品监督管理局科技计划重点项目(No.ZD2015016);河北省教育厅科学技术研究项目(No.ZD2021332);华北理工大学培育基金(No.SP201502)。

摘　　要：表面增强拉曼散射(Surface Enhanced Raman Scattering,SERS)技术在食品检测中发挥着重要的作用,该技术的核心在于基底的优化,所以开发新型基底是目前研究的热点课题。采用金银两种纳米复合材料,研究核壳式纳米结构的SERS基底,用有限元法对Ag@Au的结构进行电场强度的仿真,模拟在不同核壳半径、厚度以及散射光照的条件下场强的变化,计算SERS增强因子,与其他类型纳米结构进行比较。仿真实验表明,采用Ag@Au核壳结构作为SERS基底,在波长为523 nm、核半径为38 nm、壳厚度为0.5 nm时,增强效果最好,增强因子是7.47×10^(9)。因此,Ag@Au核壳式SERS基底具有广泛的应用前景。Surface enhanced Raman scattering(SERS)technology plays an important role in food detection.The core of this technology lies in the optimization of substrate,so the development of new substrate is a hot topic at present.In this paper,core-shell nanostructure SERS substrates are studied by using gold and silver nanocomposites [e-mail] changes of field intensity under different core-shell radius,thickness and scattered light are simulated,and the SERS enhancement factor is calculated and compared with other types of nanostructures.Simulation results show that Ag@Au as SERS substrate,the core-shell structure has the best enhancement effect when the wavelength is 523 nm,the core radius is 38 nm and the shell thickness is 0.5 nm,the enhancement factor is 7.47×10^(9).So,the Ag@Au core-shell SERS substrate has a wide application prospect.

关 键 词：表面增强拉曼散射 核壳结构 金银纳米颗粒 有限元法 

分 类 号：O657.37[理学—分析化学]