材料科学
薄脆饼
拉曼光谱
拉曼散射
聚苯乙烯
光电子学
栅栏
光学
罗丹明6G
纳米技术
荧光
聚合物
物理
复合材料
作者
Junfan Chen,Cong Zhang,Jie Zhou,Yongtian Zhu
摘要
Two types of Ag grating arrays as surface-enhanced Raman scattering (SERS) were fabricated using the monolayer self-assembled polystyrene (PS) as a template, using the silver film and monocrystalline silicon wafer as the substrates, imprinting different thicknesses of silver (50 nm, 75 nm, 100 nm, 125 nm and 150 nm) on the template, then removing PS. Rhodamine 6G (R6G) was used as a probe to characterize the performance of Raman enhancement. Experimental results showed that two structures can obtain a Raman enhancement factor of more than 10 7 at arbitrary deposition thicknesses. The insensitivity of two arrays induced by incident polarization and the difference in near-field and far-field simulation were also compared. These novel SERS substrates can achieve considerable uniformity, and the relative standard deviation (RSD) of the characteristic peak calculated at 1650 cm −1 were about 9.2% and 9.5%, respectively.
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