Thermal metamaterials can effectively manipulate heat flux to achieve different thermal management functions, such as thermal cloak, concentrator, and rotator. To date, most of these metamaterials are based on macroscopic compound structures, such as metal/polymer. Herein, the concept of thermal metamaterials is extended to two-dimensional (2D) graphene-based systems because of their fast response speeds, in contrast to traditional three-dimensional metamaterials. Three thermal metamaterials with heterogeneous thermal parameters are constructed using nano-holed graphene, and some extraordinary...
