Two-dimensional (2D) materials are crystalline materials consisting of a single layer of atoms. Since the discovery of graphene, research of various two-dimensional materials including graphene has been carried out. As different two-dimensional materials, such as graphene with metallic property, hexagonal boron nitride (h-BN) with insulating property, and transition metal dichalcogenides (TMDs) with semiconducting property, have been reported, the possibility has been presented about application and property variation through modification with synthesis method. Our laboratory focuses on the effective synthesis method of two-dimensional materials and chemical, structural variation which occur in the modification process.
Synthesis of two-dimensional materials
Our laboratory has attempted various methods to synthesize two-dimensional materials. Among them, chemical vapor deposition (CVD) has received considerable attention because this method can synthesize high-crystalline two-dimensional materials. We synthesize various two-dimensional materials such as, h-BN, MoS2, WSe2 using CVD method. However, it is not known how several two-dimensional materials are formed on the substrate. Our laboratory aims to identify and understand these growth mechanisms to control two-dimensional materials formed on substrates.
The areas that can be applied to the two-dimensional materials may expand depending on which molecules are functionalized. In the case of graphene, research is being carried out to form a band-gap through a functionalization process, and in the case of TMDs having a band-gap, research is being carried out to control the band-gap. Our laboratory aims to apply two-dimensional materials to the various area through the functionalization process and overcome the existing problem that spontaneous functionalization occurs at the metallic property.