(color online) Thermal conductivity of graphyne nanotube (GNT). Thermal conductivity as a function of: (a) sample length; and (b) sample diameter. AC and ZZ refer to armchair and zigzag, respectively. GNT-1 and GNT-10 refer to the nanotube with one and ten acetylenic linkages, respectively. Adapted with permission from Ref. [116], copyrighted by the American Physical Society.