Emerging Materials and Electron Microscopy Group

2D

Synthesizing and imaging 2D materials

Recently there has been interest in two-dimensional graphene-based superstructures, such as twisted bilayer or trilayer graphene or graphene on hexagonal boron nitride, stacked one on top of the other. By structural mapping in the micrometer scale, we demonstrated that superstructures consist of stacking-induced ‘superlattice domains’. We also realized that the rotational disorder between domains was created by the superstructural defects, such as wrinkles, folds and grain boundaries, and guest species intercalated between stacked layers. (Carbon 80, 755-761 (2014)) In addition to graphene, we also have interest in other 2D materials, such as boron nitride and metal dichalcogenide.