Design of Thermal Metamaterials with Excellent Thermal Control Functions by Using Functional Nanoporous Graphene
PZ Jia and D Wu and QQ Zhang and WX Zhou and ZQ Fan and YX Feng and LM Tang and KQ Chen, PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS, 14, 2000333 (2020).
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 thermal phenomena, such as effective shielding, accumulation and rotation of heat flux, are observed due to the significant anisotropic thermal conductivity of these 2D systems. Moreover, these thermal phenomena are insensitive to external disturbances. For designing thermal metamaterials, this study provides a novel approach, which can be applied to other 2D thermal functional materials.
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