Controllable heterogeneous interfaces and dielectric regulation of hollow raspberry-shaped Fe_(3)O_(4)@rGO hybrids for high-performance electromagnetic wave absorption  

作　　者：Yuhan Wu Shujuan Tan Puyu Liu Yan Zhang Peng Li Guangbin Ji 

机构地区：[1]College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

出　　处：《Journal of Materials Science & Technology》2023年第20期10-18,共9页材料科学技术（英文版）

基　　金：support from the National Nature Science Foundation of China(Nos.51971111 and 52273247);the Fund of Prospective Layout of Scientific Research for NUAA(Nanjing University of Aeronautics and Astronautics(No.ILA220461A22).

摘　　要：Heterogeneous interface engineering is closely related to the structural design of electromagnetic absorbers;thus,the interface control through structural design is a considerable approach to optimize the electromagnetic wave absorption(EWA)performance.Herein,the 3D hierarchical structure composites composed of two-dimensional reduced graphite oxide(rGO)and hollow raspberry Fe_(3)O_(4) nanoparticles was successfully fabricated by a simple pyrolysis and self-assembly process.This specific structure enriches the characteristics of interface polarization and dipole polarization,which further induces significant EWA behavior.By adjusting the amount of graphite oxide(GO),the complex dielectric constant of the obtained hybrids can be controlled,and the heterointerface can be cleverly adjusted.The minimum reflection loss(RLmin)of the typical products can be up to−73.86 dB at the thickness is only 1.35 mm,and the maximum effective absorption bandwidth(EAB)can reach 5.1 GHz.This work demonstrates that the unique structure and tunable components can fully improve the potential of electromagnetic absorption performance,which provides basic guidance for the heterogeneous interface engineering of efficient electromagnetic functional materials.

关 键 词：Electromagnetic wave absorption Dielectric regulation SELF-ASSEMBLE Hierarchical structure Composites 

分 类 号：TB3[一般工业技术—材料科学与工程]