Cobalt nanosized particles organized in a 2D superlattice: Synthesis, characterization, and magnetic properties
Cobalt nanosized particles organized in a 2D superlattice: Synthesis, characterization, and magnetic properties
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DOI：
10.1021/jp982755m
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发表时间：
1999-03-18
影响因子：
3.3
通讯作者：
Pileni, MP
中科院分区：
文献类型：
--
作者：
Petit, C;Taleb, A;Pileni, MP
胶体组装体用于合成FCC钴纳米颗粒。该颗粒被涂覆，从胶束中提取，并通过透射电子显微镜，小角X-射线散射，电子和X-射线衍射光谱进行表征。这些钴金属颗粒在空气中是稳定的，具有窄的尺寸分布，并且在沉积在石墨载体上时，自发地形成2D六边形网络。当它们分散在溶剂中并在2D超晶格中组织时，比较了磁性。观察到的磁滞回线和阻塞温度的变化，并归因于集体翻转相邻颗粒的磁化。
Colloidal assemblies are used to synthesize FCC cobalt nanoparticles. The particles are coated, extracted from micelles, and characterized by transmission electron microscopy, small angle X-ray scattering, and electron and X-ray diffraction spectroscopy. These cobalt metal particles are stable in air, have a narrow size distribution, and on deposition on a graphite support, spontaneously form a 2D hexagonal network. The magnetic properties are compared when they are dispersed in a solvent and organized in 2D superlattices. Changes in the hysteresis loop and in the blocking temperature are observed and attributed to collective flip of the magnetization of adjacent particles.