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)
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. ...