A Nano-Micro Engineering Nanofiber for Electromagnetic Absorber, Green Shielding and Sensor
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ARTICLE
Cite as Nano-Micro Lett. (2021) 13:27 Received: 25 August 2020 Accepted: 15 October 2020 © The Author(s) 2020
https://doi.org/10.1007/s40820-020-00552-9
A Nano‑Micro Engineering Nanofiber for Electromagnetic Absorber, Green Shielding and Sensor Min Zhang1, Chen Han1, Wen‑Qiang Cao1, Mao‑Sheng Cao1 *, Hui‑Jing Yang2 *, Jie Yuan3 *
HIGHLIGHTS • The 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.
ABSTRACT It is extremely unattainable for a material to simultaneously obtain efficient electromagnetic (EM) absorption
ing and green shielding as well as strain sensing functions is obtained. With the improvement of charge transport capability
e nc re g rfe in te ield Sh
engineering, a N iCo2O4 nanofiber with integrated EM absorb‑
In
Herein, by tailoring the internal structure through nano-micro
Ele
due to the competition between conduction loss and reflection.
ctr Ab omag sor n ptio etic n
and green shielding performance, which has not been reported
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 effective‑
Co
y
vit
cti
u nd
Strain Sensing
ness 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.
KEYWORDS Electromagnetic absorber; Electromagnetic shielding; NiCo2O4 nanofiber; Sensor
Min Zhang and Chen Han contributed equally to this work. * 1 2 3
Mao‑Sheng Cao, [email protected]; Hui‑Jing Yang, [email protected]; Jie Yuan, [email protected] School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China Department of Physics, Tangshan Normal University, Tangshan 063000, People’s Republic of China School of Information Engineering, Minzu University of China, Beijing 100081, People’s Republic of China Vol.:(0123456789)
13
27
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1 Introduction Porous nanostructures, with great potential for superca‑ pacitors, electromagnetic (EM) attenuation, catalysis, and biological medicine, are attracting growing interest [1–11]. A thorough comprehension of the growth mechanism sig‑ nificantly facilitates the tailoring of porous morphology and analysis of material properties. Especially for EM proper‑ ties, the superiority of porous nanostructures including light‑ weight, high s
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