High quality sub-monolayer,monolayer,and bilayer graphene on Ru(0001)  

作　　者：徐文焱 黄立 阙炎德 李恩 张海刚 林晓 王业亮 杜世萱 高鸿钧 

机构地区：[1]Institute of Physics,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Chinese Physics B》2014年第9期15-18,共4页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China(Grant Nos.2013CBA01600 and 2011CB932700);the National Natural Science Foundation of China(Grant Nos.61222112 and 11334006)

摘　　要：High quality sub-monolayer, monolayer, and bilayer graphene were grown on Ru（0001）. For the sub-monolayer graphene, the size of graphene islands with zigzag edges can be controlled by the dose of ethylene exposure. By increasing the dose of ethylene to 100 Langmuir at a high substrate temperature （800 ℃）, high quality single-crystalline monolayer graphene was synthesized on Ru（0001）. High quality bilayer graphene was formed by further increasing the dose of ethylene while reducing the cooling rate to 5 ℃/min. Raman spectroscopy revealed the vibrational states of graphene, G and 2D peaks appeared only in the bilayer graphene, which demonstrates that it behaves as the intrinsic graphene. Our present work affords methods to produce high quality sub-monolayer, monolayer, and bilayer graphene, both for basic research and applications.High quality sub-monolayer, monolayer, and bilayer graphene were grown on Ru（0001）. For the sub-monolayer graphene, the size of graphene islands with zigzag edges can be controlled by the dose of ethylene exposure. By increasing the dose of ethylene to 100 Langmuir at a high substrate temperature （800 ℃）, high quality single-crystalline monolayer graphene was synthesized on Ru（0001）. High quality bilayer graphene was formed by further increasing the dose of ethylene while reducing the cooling rate to 5 ℃/min. Raman spectroscopy revealed the vibrational states of graphene, G and 2D peaks appeared only in the bilayer graphene, which demonstrates that it behaves as the intrinsic graphene. Our present work affords methods to produce high quality sub-monolayer, monolayer, and bilayer graphene, both for basic research and applications.

关 键 词：GRAPHENE Ru（0001） scanning tunneling microscopy 

分 类 号：O613.71[理学—无机化学] TN304.23[理学—化学]