Heterointerface Engineering in Electromagnetic Absorbers: New Insights and Opportunities

Abstract

Electromagnetic (EM) absorbers play an increasingly essential role in the electronic information age, even toward the coming “intelligent era”. The remarkable merits of heterointerface engineering and its peculiar EM characteristics inject a fresh and infinite vitality for designing high‐efficiency and stimuli‐responsive EM absorbers. However, there still exist huge challenges in understanding and reinforcing these interface effects from the micro and macro perspectives. Herein, EM response mechanisms of interfacial effects are dissected in depth, and with a focus on advanced characterization as well as theoretical techniques. Then, the representative optimization strategies are systematically discussed with emphasis on component selection and structural design. More importantly, the most cutting‐edge smart EM functional devices based on heterointerface engineering are reported. Finally, current challenges and concrete suggestions are proposed, and future perspectives on this promising field are also predicted.

Anion‐Doping‐Induced Vacancy Engineering of Cobalt Sulfoselenide for Boosting Electromagnetic Wave Absorption

“…including morphology design, [3] heterojunction construction, [4] and magnetoelectric incorporation. [5] Although substantial progresses have been made, a series of fatal shortcomings also inevitably tail as follows: 1) The optimization of electronic conductivity is most commonly dependent on importing other high-conductivity materials, but seldom involves optimizing intrinsic defect active sites, so the scope for improvement is slender and unfavorable for EM parameter modulation; 2) The absorption capacity based on above traditional strategies is still far from the broadband absorption for future application; 3) A preferred dissipation mechanism in these dielectric loss materials is still in infancy due to its compositing feature in the most of currently reports.…”

Multifunctional Integrated Transparent Film for Efficient Electromagnetic Protection

“…Entering into the age of fifth generation communication, the mushroom development of wireless communication equipment and flexible electronics has accelerated the human society process. However, the accompanying electromagnetic radiation becomes a "health killer" to human [1][2][3][4]. Exploring materials with high-efficient and stable electromagnetic wave attenuation capability is a feasible strategy to reduce electromagnetic pollution [5,6].…”

Customizing Heterointerfaces in Multilevel Hollow Architecture Constructed by Magnetic Spindle Arrays Using the Polymerizing‐Etching Strategy for Boosting Microwave Absorption

“…Heterointerface engineering plays a crucial role in tuning conductivity and permittivity of heterogeneous materials, which could induce strong polarization loss and promote microwave absorption (MA). [ 1 , 2 , 3 , 4 , 5 ] To utilize heterointerfaces to tailor electromagnetic properties and realize high absorption efficiency, an appropriate composite system should be selected and investigated. [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ] However, the precise design and systematic mechanism researches on heterointerfaces for MA have been rarely reported.…”