Superparamagnetic nickel ferrite colloidal spheres for constructing magnetically responsive photonic crystals

被引：10
|
作者：
Fu, L. S. [1 ]
Xu, C. Y. [1 ,2 ]
Wang, W. S. [1 ,2 ]
Jiang, J. T. [1 ]
Zhen, L. [1 ,2 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, MOE Key Lab Microsyst & Microstruct Mfg, Harbin 150001, Peoples R China
来源：
MATERIALS LETTERS | 2012年 / 81卷
关键词：
Magnetic materials; Nanocrystalline materials; Superparamagnetic nanoparticles; Nickel ferrite; Photonic crystals; NANOPARTICLES; SIZE;
D O I：
10.1016/j.matlet.2012.04.139
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Well-dispersed nickel ferrite (NixFe1-xFe2O4) colloidal spheres with uniform size and tunable composition were synthesized by a simple hydrothermal method. The changes of diameter, grain size, and magnetic properties of nickel ferrite colloidal spheres with the content of nickel element were investigated. The saturation magnetization of nickel ferrite can be tuned via changing the composition, which affects molecular magnetic moment and diameter of colloidal spheres. All nickel ferrite colloidal spheres prepared in this work show superparamagnetic behavior, and thus can be used to construct magnetically responsive photonic crystals. The color of aqueous solution containing Ni0.40Fe0.60Fe2O4 colloidal spheres changed from blue to brown with decreasing external magnetic field. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：62 / 64
页数：3
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