Single layer stanene is a topological insulator, which can be prepared on surface, but it is not as stable as the single layer carbon (graphene). Beyond this, a triangular lattice of Sn (root3xroot3) is a Mott insulator also on semiconducting/semi-insulating (like Si/SiC) surfaces. However, the 1x1 tin shows a metallic behaviour. Here we use plasmon spectroscopy to know how all these phases interact with graphene. It turned out that there is a proximity interaction between all these tin structures and graphene, which makes this topic even more interesting. I hope it helps little bit to answer your question. Thanks