Large-scale synthesis of uniform and crystalline magnetite nanoparticles using reverse micelles as nanoreactors under reflux conditions
Large-scale synthesis of uniform and crystalline magnetite nanoparticles using reverse micelles as nanoreactors under reflux conditions
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DOI：
10.1002/adfm.200400187
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发表时间：
2005-03-01
影响因子：
19
通讯作者：
Hyeon, T
中科院分区：
文献类型：
--
作者：
Lee, Y;Lee, J;Hyeon, T
我们通过铁盐在微乳液纳米反应器中的反应合成了均匀且高度结晶的磁铁矿纳米粒子。通过改变铁盐、表面活性剂和溶剂的相对浓度，可以将粒径控制在 2 nm 至 10 nm 之间。纳米颗粒的透射电子显微镜图像显示它们的尺寸分布非常均匀。使用X射线衍射和X射线磁圆二色性的结构表征表明纳米颗粒是磁铁矿。纳米粒子的磁性表征表明它们在室温下具有超顺磁性。使用类似的合成程序，我们已经能够合成几种混合金属铁氧体的纳米颗粒，包括铁氧体钴、铁氧体锰、铁氧体镍和铁氧体锌。
We have synthesized uniform and highly crystalline magnetite nanoparticles from the reaction of iron salts in microemulsion nanoreactors. The particle size can be controlled from 2 nm to 10 nm by varying the relative concentrations of the iron salts, surfactant, and solvent. Transmission electron microscope images of the nanoparticles reveal that they are very uniform in size distribution. Structural characterization using X-ray diffraction and X-ray magnetic circular dichroism shows that the nanoparticles are magnetite. The magnetic characterization of the nanoparticles showed that they are superparamagnetic at room temperature. Using a similar synthetic procedure, we have been able to synthesize nanoparticles of several mixed metal ferrites including cobalt ferrite, manganese ferrite, nickel ferrite, and zinc ferrite.