A Nano-Micro Engineering Nanofiber for Electromagnetic Absorber, Green Shielding and Sensor

Nano-Micro Letters

Hui-Jing Yang¹  Jie Yuan²  Min Zhang³  Wen-Qiang Cao³  Chen Han³  Mao-Sheng Cao³ 

[1] Department of Physics, Tangshan Normal University, 063000, Tangshan, People’s Republic of China;School of Information Engineering, Minzu University of China, 100081, Beijing, People’s Republic of China;School of Materials Science and Engineering, Beijing Institute of Technology, 100081, Beijing, People’s Republic of China;

关键词: Electromagnetic absorber;    Electromagnetic shielding;    NiCoO nanofiber;    Sensor;   

DOI  :  10.1007/s40820-020-00552-9

来源: Springer

【 摘 要 】

tsThe role of electron transport characteristics in electromagnetic (EM) attenuation can be generalized to other EM functional materials.The integrated functions of efficient EM absorption and green shielding open the view of EM multifunctional materials.A novel sensing mechanism based on intrinsic EM attenuation performance and EM resonance coupling effect is revealed.AbstractIt is extremely unattainable for a material to simultaneously obtain efficient electromagnetic (EM) absorption and green shielding performance, which has not been reported due to the competition between conduction loss and reflection. Herein, by tailoring the internal structure through nano-micro engineering, a NiCo2O4 nanofiber with integrated EM absorbing and green shielding as well as strain sensing functions is obtained. With the improvement of charge transport capability of the nanofiber, the performance can be converted from EM absorption to shielding, or even coexist. Particularly, as the conductivity rising, the reflection loss declines from − 52.72 to − 10.5 dB, while the EM interference shielding effectiveness increases to 13.4 dB, suggesting the coexistence of the two EM functions. Furthermore, based on the high EM absorption, a strain sensor is designed through the resonance coupling of the patterned NiCo2O4 structure. These strategies for tuning EM performance and constructing devices can be extended to other EM functional materials to promote the development of electromagnetic driven devices.Graphic Abstract

【 授权许可】

CC BY