Besides MoS2, h-BN has been extensively prepared and studied using CVD on transaction metal surfaces such as Pt, Ni, Ru, Pd, Rh, etc. for well-ordered layer structure BN by thermal decomposition of B-trichloroborazine (ClBNH)3 or borazine (BN)3H6 [188-192]. Extreme conditions, including high temperature (>700 °C) and ultra-high vacuum are requiredfor this CVD process. It is worth mentioning here that a lattice mismatch between the metal surface and BN result in the formation of two different superstructures, i.e. type A and type B [188]. In case of minor lattice mismatch, type A structure develops during the CVD process, whereas for large mismatch such as in the case of Pt (111) (mismatch ~11%) both type A and type B structure form as observed from low energy electron diffraction (LEED) pattern (Figure. 9a). For type A structure, B atoms prefer to stay at hcp or fcc sites and N atoms at the top of the substrate atoms (Figure. 9b). While in type B structure, B and N atoms are at on top of the metal surface atoms and on the bridge sites (Figure. 9c).