Room temperature synthesis of single-crystal Fe3O4 nanoparticles with superparamagnetic property
Room temperature synthesis of single-crystal Fe3O4 nanoparticles with superparamagnetic property
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DOI：
10.1007/s00339-006-3766-y
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发表时间：
2006-11
期刊：
影响因子：
--
通讯作者：
J. Wan;G. Tang;Y. Qian
中科院分区：
文献类型：
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作者：
J. Wan;G. Tang;Y. Qian
在聚乙烯吡咯烷酮（PVP）存在下，通过室温共沉淀法成功制备了粒径均匀、单分散性较好的单晶Fe3O4纳米粒子。该方法不需要高温、昂贵和有毒的起始原料、复杂的步骤和有毒的有机溶剂。用超导量子干涉仪测量了样品的磁性能。其阻断温度为140K。单晶Fe3O4纳米粒子在300 K和10 K下的磁滞回线显示了从超顺磁性到铁磁性的转变。高饱和磁化强度的保持归因于这些Fe3O4纳米粒子的单晶性质。
Single-crystal Fe3O4nanoparticles with uniform size and relatively better monodispersity have been successfully synthesized via a facile room temperature coprecipitation route in the present of poly(vinyl pyrrolidone) (PVP). This method does not require high temperature, expensive and toxic starting materials, complicated procedure and toxic organic solvents. The magnetic properties of as-prepared samples were recorded on a superconducting quantum interference device magnetometer. Its blocking temperature is 140 K. The hysteresis loops of single-crystal Fe3O4nanoparticles at 300 K and 10 K show the transition from superparamagnetic to ferromagnetic behavior. And the maintenance of high saturation magnetization ascribes to the single-crystalline nature of these Fe3O4nanoparticles.