广东工业大学学报2024，Vol.41Issue(3)：48-53,6.DOI:10.12052/gdutxb.230036
金-银复合微纳结构制备及高灵敏度表面增强拉曼散射检测
Preparation of Au-Ag Composite Micro and Nanostructures and High Sensitivity Surface Enhanced Raman Scattering Detection
摘要
Abstract
Surface-enhanced Raman Scattering(SERS)is a rapid and highly sensitive molecular detection technology.Having a highly sensitive and uniform Raman signal is a necessary factor in spectroscopy.Raman substrate structures often face complex processes and high costs.To achieve high-performance SERS,Au-Ag composite nanostructures were prepared by multilayer Au-Ag alternate deposition,annealing and dealloying technology in this research,the method can be used for large-area preparation and facile preparation process.By annealing at a suitable temperature,a large number of nanopores are distributed on the surface of Au-Ag composite nanostructures,which can be firmly distributed on the surface to provide hot spots.The Finite-difference Time-domain(FDTD)method is used to simulate the electric field distribution,and the results show that the Au-Ag composite nanostructure surface can induce great local field enhancement.The experiment results exhibit excellent uniformity and high sensitivity of the SERS detection.The enhancement factor of the Rhodamine 6G(R6G)molecules detected by SERS substrate reaches 2.4×105,and the Relative Standard Deviation(RSD)is as low as 6.9%.The minimum detection concentration of R6G molecules by the Au-Ag composite nanostructures can reach 10-11 mol/L.The proposed Au-Ag composite nanostructures and the fabrication process have great potential in preparation of high sensitivity and excellent uniformity SERS substrate.关键词
表面增强拉曼散射/多孔金-银复合纳米结构/高灵敏度/均匀/退火Key words
SERS(Surface-enhanced Raman Scattering)/porous Au-Ag composite nanostructure/high-sensitivity/uniform/annealing分类
数理科学引用本文复制引用
鄢中华,陈星宇,刘文杰..金-银复合微纳结构制备及高灵敏度表面增强拉曼散射检测[J].广东工业大学学报,2024,41(3):48-53,6.基金项目
国家自然科学基金资助项目(61975037) （61975037）
