Size Effect on Crystal Morphology of Faceted Face-Centered Cubic Fe Nanoparticles
Size Effect on Crystal Morphology of Faceted Face-Centered Cubic Fe Nanoparticles
复制标题
多面面心立方铁纳米颗粒晶体形貌的尺寸效应
DOI：
10.1021/jp903496c
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发表时间：
2009-06-04
影响因子：
3.7
通讯作者：
Xie, Lin
中科院分区：
文献类型：
--
作者：
Ling, Tao;Zhu, Jing;Xie, Lin
面形金属纳米颗粒以其独特的物理和化学性能而备受关注。本文成功地合成了具有二十面体、十面体、五重孪晶纳米棒、四面体和立方体等多种形貌的面心立方（fcc）铁纳米颗粒。揭示了尺寸对这些面形fcc-Fe纳米颗粒形貌的影响。小尺寸（5 ~ 13 nm）有利于二十面体纳米颗粒；在中等尺寸（12 ~ 164 nm）下，十面体和五重孪晶纳米棒受到青睐；在大尺寸（200nm）下，三角形板和立方体纳米棒受到青睐。面形fcc-Fe纳米颗粒的这种尺寸-形态依赖关系可以用热力学计算很好地解释。
Faceted metal nanoparticles have attracted much attention owing to their size and shape enhanced unique physical and chemical properties. Here we successfully synthesized face-centered cubic (fcc) Fe nanoparticles with diverse morphologies including icosahedron, decahedron, 5-fold twinned nanorod, tetrahedron and cube. A size effect on the particle morphologies of these faceted fcc-Fe nanoparticles was revealed. Small sizes (5−13 nm) favor icosahedral nanoparticles; decahedron and 5-fold twinned nanorods are favored at intermediate sizes (12−164 nm), and triangular plate and cube at large sizes such as 200 nm. This size-morphology dependence correlation of faceted fcc-Fe nanoparticles can be well explained by thermodynamic calculations.