Self-formation of Ag particles/Ag-Zr alloy films on flexible polyimide as SERS substrates
| Autor: | H.R. Stock, Haoliang Sun, Guangxin Wang, X.X. Huang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Annealing (metallurgy) General Physics and Astronomy Zr alloy 02 engineering and technology Surfaces and Interfaces General Chemistry Sputter deposition 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films symbols.namesake Chemical engineering Specific surface area symbols 0210 nano-technology Single crystal Raman scattering Polyimide |
| Zdroj: | Applied Surface Science. 487:1341-1347 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2019.05.181 |
| Popis: | 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 × 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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