基于平板波导-金纳米颗粒基底的表面增强拉曼散射信号长程探测  

Long-Range Detection of Surface-Enhanced Raman Scattering Signal Based on Flat-Plate Waveguide-Gold Nanoparticles Substrate

作　　者：刘少平 姜小明 赖林 刘家瑜 钟征源 薄晓晗 许茜 Liu Shaoping;Jiang Xiaoming;Lai Lin;Liu Jiayu;Zhong Zhengyuan;Bo Xiaohan;Xu Qian(College of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;College of Bioinformatics,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学光电工程学院,重庆400065 [2]重庆邮电大学生物信息学院,重庆400065

出　　处：《激光与光电子学进展》2021年第23期379-385,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61801069)。

摘　　要：研制了一种基于聚合物平板波导-金纳米颗粒(AuNPs)的表面增强拉曼散射(SERS)基底,长程检测了罗丹明6G(R6G)的SERS信号,对基底的增强性能和重复性进行了分析。实验结果表明:SERS信号强度随着探测距离的增加先增大后减小,在探测距离为10 mm时SERS信号达到最大值;该基底对R6G的检测限为10^(-7)mol/L,增强因子为4.3×10^(4);R6G各特征峰强度的相对标准偏差(RSD)在3%左右,具有较好的重复性。该聚合物平板波导-AuNPs SERS基底能够有效长程检测SERS信号,为生物样本分子的无损检测奠定了基础。A surface-enhanced Raman scattering(SERS) substrate based on polymeric flat-plate waveguide and gold nanoparticles(AuNPs) is developed.The SERS signal of rhodamine 6 G(R6 G) is detected in the long range,and the enhancement performance and reproducibility of the substrate are analyzed.The experimental results show that the SERS signal increases and then decreases with increasing detection distance,reaching a maximum at a detection distance of 10 mm;the detection limit of the substrate for R6 G is 10^(-7) mol/L and the enhancement factor is 4.3×10^(4);the relative standard deviation(RSD) of each characteristic peak intensity of R6 G is around 3% and has good repeatability.The polymeric flat-plate waveguide-AuNPs substrate can effectively detect SERS signals in a long range,laying the foundation for the non-destructive detection of molecules in biological samples.

关 键 词：光谱学 表面增强拉曼散射 平板波导 长程检测 聚合物 

分 类 号：O433.4[机械工程—光学工程]