量子电子学报, 2017, 34 (4): 385, 网络出版: 2017-08-09
金属尖端角度对表面增强拉曼散射的影响
Influence of metal tip angle on surface enhanced Raman scattering
光谱学 表面增强拉曼散射 光刻 数字微镜设备 spectroscopy surface enhance Raman scattering light lithography digital micro-mirror device
摘要
金属尖端对于表面拉曼散射有增强效果,尖端的角度对表面增强拉曼散射(SERS)的 影响很少有定量报道。为研究尖端角度大小与SERS的关系,利用数字微镜设备(DMD)进行无掩 模投影光刻制备了4组不同尖端角度的样品,分别为30°、60°、90°、120°。测量了样品对 应的SERS谱,研究了金属尖端角度对SERS的影响。结果表明: 锐角具有更好的表面增强拉曼散射效果,角度越小增强效果越明显;钝角情况下, SERS对角度 依赖的敏感度下降。
Abstract
Surface Raman scattering can be enhanced by metal tip. There are few quantitative reports about the influence of tip angle on surface enhanced Raman scattering (SERS). In order to investigate the relationship between the tip angle and SERS, four kinds of samples with different tip angles, including 30°, 60°, 90°, 120° are fabricated by maskless projective lithography using digital micro-mirror device (DMD). The corresponding SERS spectra of the samples are measured, and influence of metal tip angle on SERS is investigated. Results show that acute angles have a better SERS effect, and the smaller the angle is, the more obvious the effect will be. Dependence on angle of SERS decreases in the case of obtuse angle.
崔辰静, 李宽国, 戴艳秋, 鲁拥华, 王沛. 金属尖端角度对表面增强拉曼散射的影响[J]. 量子电子学报, 2017, 34(4): 385. CUI Chenjing, LI Kuanguo, DAI Yanqiu, LU Yonghua, WANG Pei. Influence of metal tip angle on surface enhanced Raman scattering[J]. Chinese Journal of Quantum Electronics, 2017, 34(4): 385.