摘要
Since Geim et al.firstly separated graphene from graph-ite by mechanical exfoliation method in 2004,the research of two-dimensional(2D)van der Waals(vdW)layered materials has begun[1].Compared with three-dimensional materials,2D vdW layered materials exposing the most atoms to exterior are more sensitive to external control and have the great po-tential applications in electronic,optoelectronic and electro-chemical area[2].
