Thermally-tailoring dielectric “genes” in graphene-based heterostructure to manipulate electromagnetic response

Fifth-generation (5G) is as much a challenge as an opportunity. Getting insight into the nature of manipulating electromagnetic (EM) response is greatly imperative to guide the scientific research and technological exploitation at such a critical time. Herein, the dielectric “genes” of graphene-based heterostructure is further demonstrated experimentally and theoretically based on previous work, endowing unlimited possibility to manipulate EM response, even at elevated temperature. The dielectric “genes” categories are successfully discriminated, mainly including conduction network, intrinsic defects, impurity defects, and interfaces, and their temperature evolution is revealed in detail. By multiscale tailoring of “genes”, the maximal reflection loss (RL) is raised up to −58.1 dB at T = 423 K with a greatly reduced matching thickness of 1.16 mm, and the EM interference shielding performance emerges with an effective absorption efficiency (A_eff) higher than 70%. These findings of dielectric “genes” will open up an unexpected horizon for smart material design in the coming 5G age, providing a great boost for promoting the next-generation smart devices, as well as environmental government and protection.