Self-formation of Ag particles/Ag-Zr alloy films on flexible polyimide as SERS substrates

被引:25
作者
Huang, X. X. [1 ]
Sun, H. L. [1 ,2 ]
Wang, G. X. [1 ]
Stock, H. R. [1 ]
机构
[1] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471003, Peoples R China
[2] Collaborat Innovat Ctr Nonferrous Met Henan Prov, Luoyang 471003, Peoples R China
基金
中国国家自然科学基金;
关键词
Ag-Zr alloy film; Flexible polyimide; Annealing; Ag particles; SERS substrate; ENHANCED RAMAN-SCATTERING; SILVER NANOPARTICLES; HILLOCK FORMATION; THIN-FILMS; AU; MICROSTRUCTURE; NANOSTRUCTURES; FABRICATION; UNIFORM; GROWTH;
D O I
10.1016/j.apsusc.2019.05.181
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Ag-Zr alloy films were deposited on flexible polyimide (PI) substrates by magnetron sputtering and subsequently subjected to vacuum annealing. Effects of annealing temperature, Zr content and film thickness on formation of Ag particle and the surface enhanced Raman scattering property of Ag particles/Ag-Zr alloy films have been investigated. Results show that microstructure of Ag-Zr alloy film changes significantly after annealing and a large number of regular polyhedral Ag particles spontaneously formed on the surface of annealed Ag-Zr alloy films. The Ag particles are single crystal and uniformly distributed on the Ag-Zr alloy films surface to form the Ag particles/Ag-Zr alloy films composite structure with large specific surface area. The detection limit of R6G concentration using Ag particles/Ag-Zr alloy films covered by 12 nm Ag film as SERS substrate is significantly lower than 5 x 10(-8) M (1 M = 1 mol/L) due to its abundant active "hot spots". The particle/film composite structure obtained in this paper provides a method to prepare the highly efficient SERS substrates.
引用
收藏
页码:1341 / 1347
页数:7
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