Preface to the Special Issue on Monoelemental 2D Semiconducting Materials and Their Applications

Atomically monolayer 2D material was predicted thermal dynamically unstable,until the ground-breakthrough reports of the isolation of graphene in 2004,which was shortly recognized by the Nobel Prize in 2010.Monoelemental graphene inherits the merits of simple stoichiometry and crystal structure,which offers the possibilities for basic physics scenarios demonstrations and a great deal of functional devices explorations.