Icosahedral Face-Centered Cubic Fe Nanoparticles: Facile Synthesis and Characterization with Aberration-Corrected TEM

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• 作者：Tao Ling ; Lin Xie ; Jing Zhu ; Huimin Yu ; Hengqiang Ye ; Rong Yu ; Zhiying Cheng ; Li Liu ; Li Liu ; Guangwen Yang ; Zhida Cheng ; Yujia Wang ; Xiuliang Ma
• 刊名：Nano Letters
• 出版年：2009
• 出版时间：April 8, 2009
• 年：2009
• 卷：9
• 期：4
• 页码：1572-1576
• 全文大小：312K
• 年卷期：v.9,no.4(April 8, 2009)
• ISSN：1530-6992

文摘

Iron nanoparticles are highly desirable for their potential applications in magnetic and catalytic industry. However, their shape-controlled fabrication is still an important challenge. Here we successfully synthesized icosahedral face-centered cubic (fcc) Fe nanoparticles with size of 5−13 nm by a specifically designed thermodynamic governed synthetic route, which is facile but highly efficient and reproducible. With the aberration-corrected transmission electron microscopy (TEM), the unique icosahedral structure’s pseudo-2-fold, 3-fold, and pseudo-5-fold axes were directly observed for the first time and verified by computer simulation, which reveals that nanoparticles’ orientations have a large impact on HRTEM images at ultrahigh resolution. It is expected that as-synthesized Fe nanoparticles with sharp corners and edges would be beneficial for tailoring chemical and physical properties at the nanoscale.