Controllable Atomic Migration in Microstructures and Defects for Electromagnetic Wave Absorption Enhancement

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Март 25, 2024

Abstract Defects and microstructures have been utilized to effectively modulate electromagnetic (EM) wave absorption for mitigating pollution stealth issues. However, precisely feasibly tailoring them still remains challenging. Here, by using a multilevel hollow cobalt sulfide embedded in heteroatomic sulfur (S) ‐doped carbon aerogel, preferential reaction strategy of modulating point defects via controllable S atoms migration is proposed improve the EM absorption. contribute creation structures Kirkendall effects, as well inducing lattice through doping. More significantly, mechanisms prioritizing formation over discovered, with low‐velocity atomic primarily microstructure interfacial polarization impedance matching, high‐velocity atom focused on introducing achieve conductive loss. The resulting aerogel exhibits an exceptionally maximum reflection loss −52.82 dB effective bandwidth 8.82 GHz, which far exceeds most currently reported materials. Experimental theoretical approaches, including microwave heating, Tesla interaction, first principles, far‐field simulation, are comprehensively employed verify its effect mechanism. Furthermore, combination excellent infrared self‐cleaning properties opens up potential applications complex environments.

Язык: Английский

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Joule-Heating-Driven Synthesis of a Honeycomb-Like Porous Carbon Nanofiber/High Entropy Alloy Composite as an Ultralightweight Electromagnetic Wave Absorber

ACS Nano, Год журнала: 2024, Номер 18(6), С. 5040 - 5050

Опубликована: Янв. 29, 2024

High entropy alloys (HEA) have garnered significant attention in electromagnetic wave (EMW) absorption due to their efficient synergism among multiple components and tunable electronic structures. However, high density limited chemical stability hinder progress as lightweight absorbers. Incorporating HEA with carbon offers a promising solution, but synthesizing stable HEA/carbon composite faces challenges the propensity for phase separation during conventional heat treatments. Moreover, EMW mechanisms HEAs may be different from established empirical models high-entropy effect. This underscores urgent need synthesize absorbers uncover intrinsic mechanisms. Herein, we successfully integrated quinary FeCoNiCuMn into honeycomb-like porous nanofiber (HCNF) using electrostatic spinning Joule-heating method. Leveraging inherent lattice distortion effects honeycomb structure, HCNF/HEA demonstrates outstanding properties at an ultralow filler loading of 2 wt %. It achieves minimum reflection loss −65.8 dB boasts maximum bandwidth up 7.68 GHz. study not only showcases effectiveness combining HCNF HEA, also potential synthesis developing HEA-based

Язык: Английский

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Perspective of electromagnetic wave absorbing materials with continuously tunable effective absorption frequency bands

Composites Communications, Год журнала: 2024, Номер 50, С. 101993 - 101993

Опубликована: Июль 9, 2024

Язык: Английский

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Broadband electromagnetic wave absorption using pure carbon aerogel by synergistically modulating propagation path and carbonization degree

Journal of Colloid and Interface Science, Год журнала: 2023, Номер 652, С. 780 - 788

Опубликована: Авг. 19, 2023

Язык: Английский

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Magnetic NiFe2O4@FeNi3 core-shell nanospheres derived from FeNi-LDH precursor anchoring on rGO nanosheets for enhanced electromagnetic wave absorption

Journal of Material Science and Technology, Год журнала: 2023, Номер 171, С. 101 - 114

Опубликована: Авг. 6, 2023

Язык: Английский

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Regulating the electromagnetic balance of materials by electron transfer for enhanced electromagnetic wave absorption

Journal of Material Science and Technology, Год журнала: 2024, Номер 195, С. 63 - 73

Опубликована: Фев. 24, 2024

Язык: Английский

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Construction of three-dimensional porous network Fe-rGO aerogels with monocrystal magnetic Fe3O4@C core-shell structure nanospheres for enhanced microwave absorption

Materials Today Physics, Год журнала: 2024, Номер 42, С. 101383 - 101383

Опубликована: Март 1, 2024

Язык: Английский

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Additive manufacturing of broadband electromagnetic wave absorbing materials: Polymer-derived SiC/Si3N4 composites with triply periodic minimal surface meta-structure

Chemical Engineering Journal, Год журнала: 2024, Номер 483, С. 149185 - 149185

Опубликована: Янв. 29, 2024

Язык: Английский

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Multifunctional graphene/Ti3C2T MXene aerogel inlaid with Ni@TiO2 core-shell microspheres for high-efficiency electromagnetic wave absorption and thermal insulation

Chemical Engineering Journal, Год журнала: 2024, Номер 488, С. 150918 - 150918

Опубликована: Апрель 1, 2024

Язык: Английский

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Lightweight and high-strength SiC/MWCNTs nanofibrous aerogel derived from RGO/MWCNTs aerogel for microwave absorption

Chemical Engineering Journal, Год журнала: 2024, Номер 486, С. 150417 - 150417

Опубликована: Март 14, 2024

Язык: Английский

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