Ultrasonic-assisted synthesis of colloidal Mn3O4 nanoparticles at normal temperature and pressure
Ultrasonic-assisted synthesis of colloidal Mn3O4 nanoparticles at normal temperature and pressure
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DOI：
10.1021/cg050402o
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发表时间：
2006-08-02
影响因子：
3.8
通讯作者：
Zheng, Huagui
中科院分区：
文献类型：
--
作者：
Lei, Shuijin;Tang, Kaibin;Zheng, Huagui
在常温常压下，在不添加成核剂和表面活性剂的情况下，通过超声辅助直接合成制备了直径约为5-10 nm的胶体纳米Mn3O4。高分辨率透射电镜观察表明，合成的纳米颗粒为单晶。对样品的磁性进行了详细的研究。超导量子干涉器件（SQUID）结果表明，Mn3O4纳米颗粒在低温（40 K）下表现出铁磁性。
A facile direct synthesis has been developed to prepare colloidal Mn3O4 nanoparticles with diameters of about 5-10 nm at normal temperature and pressure by an ultrasonic-assisted method in the absence of any additional nucleation and surfactant. High-resolution transmission electron microscopy observations revealed that the as-synthesized nanoparticles were single crystals. The magnetic properties of the samples were investigated in detail. The superconducting quantum interference device (SQUID) results showed that Mn3O4 nanoparticles exhibited ferromagnetic behavior at low temperature ( 40 K).