Multiple plasmon couplings in 3D hybrid Au-nanoparticles-decorated Ag nanocone arrays boosting highly sensitive surface enhanced Raman scattering  

作　　者：Zewen Zuo Lianye Sun Yongbin Guo Lujun Zhang Junhu Li Kuanguo Li Guanglei Cui 

机构地区：[1]Anhui Province Key Laboratory of Optoelectric Materials Science and Technology(OEMST),Key Laboratory of Functional Molecular Solids,Ministry of Education,School of Physics and Electronics Information,Anhui Normal University,Wuhu 241002,China

出　　处：《Nano Research》2022年第1期317-325,共9页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51871003).

摘　　要：Plasmon coupling is an essential strategy to realize strong local electromagnetic(EM)field which is crucial for high-performance plasmonic devices.In this work,multiple plasmon couplings are demonstrated in three-dimensional(3D)hybrid plasmonic systems composed of polydimethylsiloxane-supported ordered silver nanocone(AgNC)arrays decorated with high-density gold nanoparticles(AuNPs)which are fabricated by a template-assisted physical vapor deposition process.Strong interparticle coupling,particle-film coupling,inter-cone coupling,and particle-cone coupling are revealed by numerical simulations in such composite nanostructures,which produce intense and high-density EM hot spots,boosting highly sensitive and reproducible surface enhanced Raman scattering(SERS)detection with an enhancement factor of-1.74×10^(8).Furthermore,a linear correlation between logarithmic Raman intensity and logarithmic concentration of probe molecules is observed in a large concentration range.These results offer new ideas to develop novel plasmonic devices,and provide alternative strategy to realize flexible and high-performance SERS sensors for trace molecule detection and quantitative analysis.

关 键 词：multiple plasmon coupling electric field enhancement nanocone array three-dimensional hybrid surface enhanced Raman scattering(SERS)substrate 

分 类 号：TB383[一般工业技术—材料科学与工程]