Study on magnetite nanoparticles synthesized by chemical method
Study on magnetite nanoparticles synthesized by chemical method
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DOI：
10.1016/j.jmmm.2006.10.837
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发表时间：
2007-03-01
影响因子：
2.7
通讯作者：
Ishio, S.
中科院分区：
文献类型：
--
作者：
Pei, Wenli;Kumada, H.;Ishio, S.
采用化学方法合成了尺寸可控的磁铁矿纳米颗粒。较高的沉积温度和快速升温程序有利于单分散纳米粒子的粒径分布和制造。较大的纳米颗粒可以通过两步法合成。成功制备了无团聚的大纳米粒子（最大25 nm）。 11nm磁铁矿颗粒在室温下的饱和磁化强度为45emu/g，由于表面效应，其小于块状磁铁矿的饱和磁化强度。磁铁矿纳米粒子的磁滞非常小，表明超顺磁行为。通过 MFM 成功观察到 11 nm 磁铁矿纳米粒子的磁畴。 (c) 2006 Elsevier B.V. 保留所有权利。
Magnetite nanoparticles with controlled size were synthesized by chemical method. Higher deposition temperature and a rapid- raising temperature procedure are favorable to particle size distribution and fabrication of monodisperse nanoparticles. The larger nanoparticles can be synthesized by the two- step method. The large nanoparticle ( up to 25 nm) without agglomeration was successfully produced. The saturation magnetization of 11nm magnetite particles was 45 emu/ g at room temperature, which is smaller than that of bulk magnetite due to surface effect. Hysteresis of the magnetite nanoparticle was very small, indicating superparamagnetic behavior. The magnetic domains of the 11nm magnetite nanoparticles were successfully observed by MFM. (c) 2006 Elsevier B. V. All rights reserved.