摘要
Fe3O4 magnetic nanoparticles were prepared by the aqueous co-precipitation of FeCl3-6H2O and FeCl2-4H2O with addition of ammonium hydroxide. The conditions for the preparation of Fe3O4 magnetic nanoparticles were optimized, and Fe3O4 magnetic nanoparticles obtained were characterized systematically by means of transmission electron microscope （TEM）, dynamic laser scattering analyzer （DLS） and X-ray diffraction （XRD）. The results revealed that the magnetic nanoparticles were cubic shaped and dispersive, with narrow size distribution and average diameter of 11.4 nm. It was found that the homogeneous variation of pH value in the solution via the control on the dropping rate of aqueous ammonia played a critical role in size distribution. The magnetic response of the product in the magnetic field was also analyzed and evaluated carefully. A 32.6 mT magnetic field which is produced by four ferromagnets was found to be sufficient to excite the dipole moments of 0.05 g Fe3O4 powder 2 cm far away from the ferromagnets. In conclusion, the Fe3O4 magnetic nanoparticles with excellent properties were competent for the magnetic carders of targeted-drug in future application.
Fe3O4 磁性的 nanoparticles 被 FeCl3 · 6 H2O 和 FeCl2 · 4 H2O 的水的一起沉淀与铵氢氧化物的增加准备。为 Fe3O4 磁性的 nanoparticles 的准备的条件被优化，并且获得的 Fe3O4 磁性的 nanoparticles 借助于传播电子显微镜(TEM ) 系统地被描绘，动态激光散布分析器(DLS ) 和 X 射线衍射(XRD ) 。结果表明磁性的 nanoparticles 是立方的塑造并且散，与狭窄的大小分布和 11.4 的平均直径， nm.It 被发现在经由氨水的落下的率上的控制的解决方案的最适 PH 价值的同类的变化在大小分布起了一个关键作用。在磁场的产品的磁性的反应也被分析并且评估被四种铁磁物质生产的 32.6 mT 磁场被发现足够使离开铁磁物质 2 厘米远的 0.05 g Fe3O4 粉末的偶极矩激动的 carefully.A。在结论，有优秀性质的 Fe3O4 磁性的 nanoparticles 为在未来申请的目标药的磁性的搬运人是能干的。
基金
the Technology Project of Jiangxi Provincial Education Department
Jiangxi Provincial Science Department
