Abstract
Electromagnetic absorption/shielding materials are highly desirable for high-rapidly developing microelectronic devices. However, there is still a lack of specific materials with dynamic tunable properties to solve issues in complex environments. We herein report a hybrid composite consisting of three-dimensional porous melamine sponge and core@shell Al@Al2O3 nanoparticles, possessing multiple merits of low density (12.47 mg/cm3) and high elasticity. By compressing/decompressing the hybrid, the electromagnetic performances can be reversibly tuned between 18 and 26.5 GHz, ascribed to the tunable conductivity raised from the three-dimensional continuous conductive paths. The present work provides a concept for the design of “dynamic” electromagnetic materials.
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