【摘要】 当贵金属纳米结构被外部电磁波激发时,由于自由电子沿着贵金属纳米结构表面的集体振荡将会出现光学共振,这些集体振动模式被称为等离子体[1-3]。在周期性阵列结构中LSPR的分布和强度是决定其表面增强拉曼(SERS)性能的最主要因素。通过倾角溅射的方法制备了倾斜角度可调的的六方密排银纳米棒阵列(见Scheme 1.),通过数值模拟和偏振拉曼结合的方法,解释了不同倾斜角度的所对应的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的根本原因。本研究不仅促进了这种结构在SERS领域的深入应用,同时也增加了我们对复杂金属纳米结构中表面等离子体激发的深入理解。更多还原

【Abstract】 When the noble metal nanostructure is excited by external electromagnetic waves,optical resonance will occur due to the collective oscillation of free electrons along the surface of noble metal nanostructures,These collective vibration modes are called plasma.The distribution and strength of LSPR are the most important factors to determine the performance of the SERS in the periodic array structure,through simulation and polarization Raman integration method.This paper explains the root cause of the obvious red shift in the corresponding principal peak of the a1 vibrational mode of the 4-MBA probe molecules.更多还原