材料科学
退火(玻璃)
拉曼散射
拉曼光谱
去湿
分析化学(期刊)
粒径
薄膜
纳米技术
光电子学
光学
化学工程
复合材料
色谱法
物理
工程类
化学
作者
Junfan Chen,Hongxian Chen,Jie Zhang,Yong Zhu
摘要
Combining self-assembly technology and the thin-film annealing method, annealed Ag nano-islands (Ag NIs) with SiO 2 microsphere (MS) arrays were prepared as surface-enhanced Raman scattering (SERS) substrate in this paper. A “top-binding” model was established to analyze the effect of SiO 2 MS at different annealing temperatures and different Ag film thickness. The corresponding comparative analysis with and without MS templates have been carried on. We simulated the electric field enhancement, coupling enhancement spectrum and the optical focus function of SiO 2 MS. Characterization and experiments showed that the use of a SiO 2 MS array as a dewetting template can well regulate the size and morphology of Ag NIs. Among them, SiO 2 MS-Ag-20 can achieve the most uniform particle size at an annealing temperature of 873.15 K. According to the UV-Vis absorption spectrum, it had an active SERS analytical enhancement factor (AEF) of ∼3.91×10 5 and good SERS reproducibility (relative standard deviation, RSD = 0.113) for R6G when the wavelength was 532 nm.
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