摘要
在准静态极限下,首先通过第一性原理推导带壳纳米颗粒的多重极化率,然后运用GN模型研究Ag-Au核-壳结构双金属纳米颗粒的表面增强拉曼散射.研究结果表明,随着Au壳层厚度的增加,短波长处SPR峰发生红移现象,强度减小,而长波长处的SPR峰红移的过程中伴随着强度的增加.
In this paper,we present a first-principles approach to the study of the multipolar moments induced by the coated bimetallic particles in the quasi-static limit.Based on the semiclassical Gersten-Nitzan model,we take one step forward to investigate the the enhancement radio(R) from bimetallic interface in Ag-Au core-shell structure nanoshell.Numerical results show that the longer wavelength peak red shifts slightly and gets intense,while the shorter wavelength peak red shifts nonlinearly and decreases in intensity with increasing the Au shell thickness.
出处
《苏州大学学报（自然科学版）》
CAS
2012年第2期80-83,共4页
Journal of Soochow University(Natural Science Edition)
基金
国家自然科学基金(11074183)
