倾斜Ag纳米棒阵列的等离子体共振的SERS光谱研究  

A study on the SERS spectra of plasma resonance of the tilted Ag nanobar array

作　　者：张永军[1] 朱奥男 高稔现 ZHANG Yong-jun,ZHU Ao-nan,GAO Ren-xian(College of Physics,Jilin Normal University, Siping 136000, China)

机构地区：[1]吉林师范大学物理学院,吉林四平136000

出　　处：《吉林师范大学学报（自然科学版）》2018年第3期7-10,共4页Journal of Jilin Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(61575080)

摘　　要：以六方密排聚苯乙烯小球阵列为模板,利用倾斜磁控溅射方法制备了倾斜Ag纳米棒阵SERS活性基底.通过514 nm激发线拉曼光谱测试发现,随着周期性Ag纳米棒阵列倾斜角度的增加,修饰在其表面的4-MBA分子的A1震动模式处所对应的主峰出现了明显的红移现象.通过时域有限差分(FDTD)数值模拟和线偏振拉曼光谱结合的方法,准确解释了拉曼光谱中主峰产生红移现象的根本原因.The active substrate of the tilted Ag nanobar array was prepared by tilting magnetron sputtering based on the six-sided polystyrene ball array. With the increase of the tilt angle of the periodic Ag nanobar array,the corresponding principal peak of the A1 vibration mode of the 4-MBA molecule had the significantly redshift by Raman measurement with 514 nm excitation line. And the root cause of redshift in Raman spectra was explained by means of finite difference time domain（ FDTD） numerical simulation and linear polarization Raman spectroscopy.

关 键 词：SERS 4-MBA 纳米棒阵列 LSPR 

分 类 号：O657.37[理学—分析化学]