Theoretical investigation of the extinction coefficient of magnetic fluid

被引：8
作者：
Fang, Xiaopeng [1 ]
Xuan, Yimin [1 ,2 ]
Li, Qiang [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Energy & Power Engn, Nanjing 210094, Jiangsu, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Sch Energy & Power Engn, Nanjing 210016, Jiangsu, Peoples R China
来源：
JOURNAL OF NANOPARTICLE RESEARCH | 2013年 / 15卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Magnetic fluid; Extinction coefficient; Optical property; External magnetic field; Anisotropic feature; Magnetic nanoparticle; Chain-like cluster; MD simulation; T-matrix method; NANOPARTICLES; LIGHT; MAGNETOCHROMATICS; GRATINGS;
D O I：
10.1007/s11051-013-1652-z
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A new theoretical approach for calculating the extinction coefficient of magnetic fluid is proposed, which is based on molecular dynamics (MD) simulation and T-matrix method. By means of this approach, the influence of particle diameter, particle volume fraction, and external magnetic filed on the extinction coefficient of magnetic fluid is investigated. The results show that the extinction coefficient of the magnetic fluid linearly increases with increase in the particle volume fraction. For a given particle volume fraction, the extinction coefficient increases with increase in the particle diameter which varies from 5 to 20 nm. When a uniform external magnetic filed is applied to the magnetic fluid, the extinction coefficient of the magnetic fluid presents an anisotropic feature. These results agree well with the reported experimental results. The proposed approach is applicable to investigating the optical properties of magnetic fluids.
引用
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页数：12
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