(color online) Heterostructure with different interfaces between graphene and h-BN. (a) N–C connected interface, BN–C; (b) N–C connected interface with 5 | 7 topological defects, BN–C5 | 7. B, N, C atoms are shown in purple, blue, and gray, respectively. (c) Cross-sectional heat flux density distribution in BN–C and BN–C5 | 7 heterostructures. Reprinted with permission from Ref. [84], copyright (2016) by the American Chemical Society.