Acknowledgments This work was supported by the National Natural Science Foundation of China (21373208, 91545204, and 21321002), the National Basic Research Program of China (2016YFA0200200, 2013CB834603, and 2013CB933100), and the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB 17020200). The authors are grateful for the support for Nano-X from Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (SINANO).
The orientation control of graphene overlayers on metal surface is an important issue which remains as a challenge in graphene growth on Ni surface. Here we have demonstrated that epitaxial graphene overlayers can be ...