中南大学学报（自然科学版）2012，Vol.43Issue(5)：1604-1609,6.
球形银纳米颗粒及氧化硅/银纳米壳层的消光性能模拟
Simulation on extinction properties of spherical silver nanoparticles and silica/silver nanoshells
摘要
Abstract
By means of discrete dipole approximation theory, the extinction properties in the range of UV-Vis-NIR of spherical silver nanoparticles and silica/silver nanoshells were simulated. The simulation results display that with the increase of diameters of spherical silver nanoparticles, the dipole extinction peaks gradually redshift, the quadrupole extinction peaks begin to appear and then inchmeal redshift, and scattering efficiency exceeds absorption efficiency. Size and core-shell ratio of silica/silver nanoshells have great influences on extinction property, namely, with the increase of core-shell ratio the main extinction peaks take place to redshift regularly, and with same core-shell ratio the extinction peak of larger nanoshell is located at longer wavelength. When the silver shell thickness is greater than electronic mean free path of silver, the extinction performance of nanoshells is consistent with that of same-sized silver nanoparticles.关键词
银/纳米壳层/消光性能/离散偶极近似Key words
silver/ nanoshells/ extinction property/ discrete dipole approximation分类
通用工业技术引用本文复制引用
刘琨,冯其明,欧乐明,张国范,卢毅屏..球形银纳米颗粒及氧化硅/银纳米壳层的消光性能模拟[J].中南大学学报（自然科学版）,2012,43(5):1604-1609,6.基金项目
国家自然科学基金资助项目(51104180,50574102) （51104180,50574102）
