Synthesis of Coral-Like FePt Nanoparticles with High Grain Boundary Density
Synthesis of Coral-Like FePt Nanoparticles with High Grain Boundary Density
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高晶界密度珊瑚状 FePt 纳米颗粒的合成
DOI：
10.1166/jnn.2017.14465
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发表时间：
2017-09-01
影响因子：
--
通讯作者：
Wang, Qiang
中科院分区：
文献类型：
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作者：
Pei, Wenli;Huang, Fei;Wang, Qiang
采用简单的化学方法合成了具有高晶界密度的珊瑚状FePt纳米粒子。合成的珊瑚状纳米粒子具有多晶结构与晶界。在较低的反应温度下可以获得更多的晶界。讨论了珊瑚状的生长过程。在反应开始时，前体被还原并形成FePt球形核。核逐渐长大为FePt球形纳米粒子。这些颗粒自组装和连接，形成树枝状珊瑚状的形态在表面活性剂的存在下。最后，连接颗粒生长在一起的珊瑚状纳米粒子。热处理后的纳米粒子表现出良好的磁性能。这种复杂形貌的颗粒具有较高的晶界密度和良好的磁性能，有望成为磁性纳米催化剂的候选材料。
FePt coral-like nanoparticles with high grain boundary densities have been synthesized by using a facile chemical method. The as-synthesized coral-like nanoparticles have polycrystalline structures with grain boundaries. More grain boundaries could be obtained at lower reactive temperatures. Growth process of the coral-like shape has been discussed. At the beginning of the reaction, precursors were reduced and FePt spherical nuclei were formed. The nuclei gradually grew up to FePt spherical nanoparticles. These particles self-assembled and jointed to form dendritic coral-like morphology in the presence of a surfactant. Finally, the jointing particles grew together to the coral-like nanoparticles. The nanoparticles exhibit good magnetic properties after heating treatment. This type of complex morphology particles might be a good candidate for magnetic nanocatalyst, because the particles possess high grain boundary density and good magnetic performance.