Metal atom catalyzed enlargement of fullerenes.
Metal atom catalyzed enlargement of fullerenes.
复制标题
DOI：
10.1103/physrevlett.101.176102
复制
发表时间：
2008-10
影响因子：
8.6
通讯作者：
C. Jin;Haiping Lan;K. Suenaga;Lianmao Peng;S. Iijima
中科院分区：
文献类型：
--
作者：
C. Jin;Haiping Lan;K. Suenaga;Lianmao Peng;S. Iijima
原位高分辨透射电子显微镜证实了金属催化的富勒烯增大。研究发现，在高温下，碳原子和碳团簇可以连续地嵌入到封闭的富勒烯笼中，导致富勒烯笼的直径增加，从而在吸附金属原子的帮助下形成巨大的富勒烯。密度泛函理论模拟确实表明，由于金属原子的存在，碳掺入和相关的Stone-Wales转变的活化能可以大大降低，这对富勒烯的生长至关重要。
A metal catalyzed enlargement of fullerenes has been demonstrated by in situ high-resolution transmission electron microscopy. It was found that carbon atoms and clusters can be continuously incorporated into a closed fullerene cage at a high temperature, leading to an increase in the diameter and consequently the formation of giant fullerene with the assist of adsorbed metal atoms. Density functional theoretical simulations indeed suggest that the activation energy for the carbon incorporation and the associated Stone-Wales transformation can be substantially reduced due to the presence of metal atoms, which should be of key importance for the fullerene growth.