Mesoscopic monodisperse ferromagnetic colloids enable magnetically controlled photonic crystals

被引:136
作者
Xu, XL
Majetich, SA
Asher, SA [1 ]
机构
[1] Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA
[2] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA
关键词
D O I
10.1021/ja026901k
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We report here the first synthesis of mesoscopic, monodisperse particles which contain nanoscopic inclusions of ferromagnetic cobalt ferrites. These monodisperse ferromagnetic composite particles readily self-assemble into magnetically responsive photonic crystals that efficiently Bragg diffract incident light. Magnetic fields can be used to control the photonic crystal orientation and, thus, the diffracted wavelength. We demonstrate the use of these ferromagnetic particles to fabricate magneto-optical diffracting fluids and magnetically switchable diffracting mirrors.
引用
收藏
页码:13864 / 13868
页数:5
相关论文
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