3D Seed-Germination-Like MXene with In Situ Growing CNTs/Ni Heterojunction for Enhanced Microwave Absorption via Polarization and Magnetization

Highlights Benefiting from the possible “seed-germination” effect, the “seeds” Ni 2+ grow into “buds” Ni nanoparticles and “stem” carbon nanotubes (CNTs) from the enlarged “soil” of MXene skeleton. Compared with the traditional magnetic agglomeration, the MXene-CNTs/Ni hybrids exhibit the highly spa...

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Bibliographic Details
Published in:Nano-micro letters Vol. 13; no. 1; pp. 157 - 14
Main Authors: Li, Xiao, You, Wenbin, Xu, Chunyang, Wang, Lei, Yang, Liting, Li, Yuesheng, Che, Renchao
Format: Journal Article
Language:English
Published: Singapore Springer Nature Singapore 01.12.2021
Springer Nature B.V
SpringerOpen
Subjects:
Carbon nanotubes
Dielectrics
Engineering
Germination
Heterojunctions
Impedance matching
Magnetic coupling network
Microwave absorbers
Microwave absorption
Microwave absorption and EMI shielding
Multilayers
MXene
MXenes
Nanoparticles
Nanoscale Science and Technology
Nanotechnology
Nanotechnology and Microengineering
Polarization
Seeds
Soils
Substrates
Synergistic effect
Three dimensional composites
Two-dimensional materials
Two-dimensional materials
Microwave absorption
Synergistic effect
MXene
Magnetic coupling network
ISSN:2311-6706, 2150-5551, 2150-5551
Online Access:Get full text
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Summary:Highlights Benefiting from the possible “seed-germination” effect, the “seeds” Ni 2+ grow into “buds” Ni nanoparticles and “stem” carbon nanotubes (CNTs) from the enlarged “soil” of MXene skeleton. Compared with the traditional magnetic agglomeration, the MXene-CNTs/Ni hybrids exhibit the highly spatial dispersed magnetic architecture. 3D MXene-CNTs/Ni composites hold excellent microwave absorption performance (−56.4 dB at only 2.4 mm). Ti 3 C 2 T x MXene is widely regarded as a potential microwave absorber due to its dielectric multi-layered structure. However, missing magnetic loss capability of pure MXene leads to the unmatched electromagnetic parameters and unsatisfied impedance matching condition. Herein, with the inspiration from dielectric-magnetic synergy, this obstruction is solved by fabricating magnetic CNTs/Ni hetero-structure decorated MXene substrate via a facile in situ induced growth method. Ni 2+ ions are successfully attached on the surface and interlamination of each MXene unit by intensive electrostatic adsorption. Benefiting from the possible “seed-germination” effect, the “seeds” Ni 2+ grow into “buds” Ni nanoparticles and “stem” carbon nanotubes (CNTs) from the enlarged “soil” of MXene skeleton. Due to the improved impedance matching condition, the MXene-CNTs/Ni hybrid holds a superior microwave absorption performance of − 56.4 dB at only 2.4 mm thickness. Such a distinctive 3D architecture endows the hybrids: (i) a large-scale 3D magnetic coupling network in each dielectric unit that leading to the enhanced magnetic loss capability, (ii) a massive multi-heterojunction interface structure that resulting in the reinforced polarization loss capability, confirmed by the off-axis electron holography. These outstanding results provide novel ideas for developing magnetic MXene-based absorbers.
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ISSN:2311-6706
2150-5551
2150-5551
DOI:10.1007/s40820-021-00680-w