BIREFRINGENCE AND MAGNETO-OPTICAL PROPERTIES IN OLEIC ACID COATED Fe3O4 NANOPARTICLES: APPLICATION FOR OPTICAL SWITCH

被引：15
|
作者：
Xia, Si-Hua [1 ]
Wang, Jun [1 ,2 ]
Luy, Zhang-Xian
Zhang, Feiyan [1 ]
机构：
[1] Ningbo Univ, Fac Sci, Ningbo 315211, Zhejiang, Peoples R China
[2] Wanli Univ, Jr Coll, Ningbo 315100, Zhejiang, Peoples R China
来源：
INTERNATIONAL JOURNAL OF NANOSCIENCE | 2011年 / 10卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Magnetic fluids; birefringence; magneto-optical properties; optical switch;
D O I：
10.1142/S0219581X11008289
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report magneto-optical properties in a kerosene colloidal suspension of oleic acid coated Fe3O4 nanoparticles (similar to 14 nm). The magnetic colloids (fluids) show birefringence under a magnetic field. Systematical studies of the on-off switch times upon application of the on-off magnetic field with varied experimental parameters indicate that the switch response time depends strongly on the strength of the magnetic field and the concentration of the magnetic nanoparticles in the fluid. The data can be explained in terms of the formation of magnetic nanoparticle chains under a magnetic field. The important magneto-optical properties of the magnetic fluids allow us to design a tunable optical switch.
引用
收藏
页码：515 / 520
页数：6
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