超平坦金属表面上におけるグラフェン成長その場観察

抄録

We observed in-situ the growth of graphene sheets on the single crystalline Ni(111) and polycrystalline Ni substrate through surface segregation phenomena by low-energy electron microscopy. The substrate surface was flat and promoted the growth of single-domain graphene sheets in a carpet-like manner. Once an extremely small number of nucleation sites are formed, the single-domain graphene sheets continue to grow not only over steps on the substrate surface, but also over its domain boundaries. This research points to the possibility of growing expansive single-domain graphene sheets even on a polycrystalline metal surface.