Fig. 4

Possible adsorption sites and the corresponding epitaxial relationship for semiconductors on graphene. a Artificial lattice matched arrangement of the semiconductor atoms in the (111) plane of a cubic crystal [(0001) plane for hexagonal] when the atoms are placed above H- and B-sites and H- or B-sites. b Lattice constants for the lattice-matched atom arrangements. The square (■) and the hexagon (⬢) represent the cubic and hexagonal phases [84]. Copyright from American Chemical Society. c The possible lattice configurations according to the periodicity of the hexagonal lattice [85]. Copyright from American Association for the Advancement of Science