Incorporation of dielectric constituents to construct ternary heterojunction structures for high-efficiency electromagnetic response.
To satisfy the diverse requirements of low reflection and high absorption of microwave attenuation, the construction of multiple heterojunction structure is imperative. On the one hand, the impedance mismatching could be ameliorated via the addition of new component; on the other hand, the multiple interface polarizations derived from the architecture of heterojunction make for the dissipation of microwave. In this work, the ternary TiO2/RGO/Fe2O3composites exhibit tremendous superiority compared with single TiO2or RGO no matter the absorption coefficient or effective bandwidth. The maximum absorption value of the TiO2/RGO/Fe2O3composites is -44.05dB at 14.48GHz with a low thickness of 2.0mm. In addition, the effective bandwidth (RL<-10dB) reaches 5.6GHz from 11.96 to 17.56GHz. The superior electromagnetic wave absorbing performance of the TiO2/RGO/Fe2O3composites derived from the appropriate impedance matching as well as the multiple polarization effect. The results adequately demonstrate the accessibility of the prepared TiO2/RGO/Fe2O3composites as a preeminent absorber.
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China.
Bin
B
Quan
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China.
Guoyue
G
Xu
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China.
Daoran
D
Li
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China.
Wei
W
Liu
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China. Electronic address: gbji@nuaa.edu.cn.
Guangbin
G
Ji
Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, PR China.
Youwei
Y
Du
Electromagnetic wave absorption; Impedance matching; Interface polarizations; Multiple heterojunction structure; TiO(2)/RGO/Fe(2)O(3) composites