Synthesis and magnetic properties of monodisperse magnetite nanocubes
Synthesis and magnetic properties of monodisperse magnetite nanocubes
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DOI：
10.1063/1.2833820
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发表时间：
2008-03
影响因子：
3.2
通讯作者：
Haitao Yang;T. Ogawa;D. Hasegawa;M. Takahashi
中科院分区：
文献类型：
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作者：
Haitao Yang;T. Ogawa;D. Hasegawa;M. Takahashi
用一锅法制备了尺寸在6.5~30.0 nm之间的单分散Fe3O4纳米立方体。通过对流组装技术在衬底上沉积了自组装纳米立方体超晶格的形状诱导织构。与各向同性球形纳米粒子相比，立方体形状影响自组装超晶格中单个粒子的结晶取向。尺寸小于25 nm的纳米立方体在室温下表现出典型的超顺磁性行为。比较了不同尺寸立方在5K时的磁滞回线，揭示了饱和磁化强度和矫顽力与尺寸的关系。
The monodisperse Fe3O4 nanocubes with controllable sizes from 6.5to30.0nm have been synthesized in one pot. The shape-induced texture of the self-assembled nanocube superlattices has been deposited onto substrates by a convective assembly technique. The cubelike shapes affect the crystalline orientation of individual particles within the self-assembled superlattices compared with the nanoparticles with an isotropic spherical shape. The nanocubes with a size less than 25nm show a typical superparamagnetic behavior at room temperature. Comparison of the hysteresis loop at 5K of cubes with different sizes reveals a size-dependent behavior of saturation magnetization and coercivity.