Graphene growth by a metal-catalyzed solid-state transformation of amorphous carbon.
Graphene growth by a metal-catalyzed solid-state transformation of amorphous carbon.
复制标题
DOI：
10.1021/nn103456z
复制
发表时间：
2011-01
期刊：
影响因子：
17.1
通讯作者：
J. A. Rodríguez-Manzo;C. Pham‐Huu;F. Banhart
中科院分区：
文献类型：
--
作者：
J. A. Rodríguez-Manzo;C. Pham‐Huu;F. Banhart
单层和多层石墨烯是通过在催化活性金属上的无定形碳的固态转化来生长的。这个过程是在电子显微镜下进行和监测的。在600℃以上的温度下，Fe、Co或Ni晶体形成非晶碳膜。金属表面石墨烯层的成核和生长发生在非晶碳膜溶解后。结果表明，碳原子通过催化活性金属的扩散，使能量较弱的非晶态碳向更有利的石墨烯相转变。
Single and few-layer graphene is grown by a solid-state transformation of amorphous carbon on a catalytically active metal. The process is carried out and monitored in situ in an electron microscope. It is observed that an amorphous carbon film is taken up by Fe, Co, or Ni crystals at temperatures above 600 °C. The nucleation and growth of graphene layers on the metal surfaces happen after the amorphous carbon film has been dissolved. It is shown that the transformation of the energetically less favorable amorphous carbon to the more favorable phase of graphene occurs by diffusion of carbon atoms through the catalytically active metal.