Formation of Nickel Clusters Wrapped in Carbon Cages: Toward New Endohedral Metallofullerene Synthesis
Formation of Nickel Clusters Wrapped in Carbon Cages: Toward New Endohedral Metallofullerene Synthesis
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DOI：
10.1021/acs.nanolett.6b04607
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发表时间：
2017-02-01
期刊：
影响因子：
10.8
通讯作者：
Khlobystov, Andrei N.
中科院分区：
文献类型：
--
作者：
Sinitsa, Alexander S.;Chamberlain, Thomas W.;Khlobystov, Andrei N.
尽管内嵌金属富勒烯（EMF）在生物学、医学和分子电子学中的应用具有很高的潜力，并且最近在EMF合成方面做出了努力，但是通过常规合成方法可获得的EMF的种类仍然有限，并且不包括例如后过渡金属的EMF。我们提出了一种方法，其中EMF的形成是由像差校正的高分辨率透射电子光谱（AC-HRTEM）的金属簇包围的无定形碳内的碳纳米管作为纳米反应器的电子辐照引发的，并应用这种方法合成镍EMF。AC-HRTEM的使用不仅可以合成新的，以前无法实现的纳米物体，而且还可以原位研究结构转变的机制。分子动力学模拟使用国家的最先进的方法建模的电子辐照的效果进行合理化的实验观察，并将所观察到的过程与散装EMF合成的条件。
Despite the high potential of endohedral metallofullerenes (EMFs) for application in biology, medicine and molecular electronics, and recent efforts in EMF synthesis, the variety of EMFs accessible by conventional synthetic methods remains limited and does not include, for example, EMFs of late transition metals. We propose a method in which EMF formation is initiated by electron irradiation in aberration-corrected high-resolution transmission electron spectroscopy (AC-HRTEM) of a metal cluster surrounded by amorphous carbon inside a carbon nanotube serving as a nanoreactor and apply this method for synthesis of nickel EMFs. The use of AC-HRTEM makes it possible not only to synthesize new, previously unattainable nanoobjects but also to study in situ the mechanism of structural transformations. Molecular dynamics simulations using the state-of-the-art approach for modeling the effect of electron irradiation are performed to rationalize the experimental observations and to link the observed processes with conditions of bulk EMF synthesis.