Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.
Adv Mater. 2013 Jun 11;25(22):3090-4. doi: 10.1002/adma.201300595. Epub 2013 Apr 30.
A simple process to prepare monodisperse ferrimagnetic cobalt-substituted magnetite Co(x)Fe(3-x)O4 nanoparticles is reported. These ferrimagnetic nanoparticles are readily dispersed in hexane, forming a stable ferrimagnetic nanoparticle dispersion, and allowing easy nanoparticle self-assembly. When assembled under an external magnetic field (5.5 kOe), these nanoparticles show preferred magnetic alignment with their H(c) reaching 2.49 kOe.
一种简单的方法可制备单分散的铁磁性钴取代磁铁矿 Co(x)Fe(3-x)O4 纳米粒子。这些铁磁性纳米粒子很容易在正己烷中分散，形成稳定的铁磁性纳米粒子分散体，并且易于纳米粒子自组装。在外磁场（5.5kOe）下组装时，这些纳米粒子表现出优先的磁性取向，其 H(c)达到 2.49kOe。
