Defect design and vacancy engineering of NiCo2Se4 spinel composite for excellent electromagnetic wave absorption

Ceramics International, Journal Year: 2024, Volume and Issue: 50(22), P. 46643 - 46652

Published: Sept. 3, 2024

Language: Английский

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Multifunctional electromagnetic wave absorbing carbon fiber/Ti3C2TX MXene fabric with ultra-wide absorption band

Carbon, Journal Year: 2024, Volume and Issue: 230, P. 119594 - 119594

Published: Aug. 31, 2024

Language: Английский

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Advanced Functional Electromagnetic Shielding Materials: A Review Based on Micro-Nano Structure Interface Control of Biomass Cell Walls

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)

Published: Sept. 20, 2024

Abstract Research efforts on electromagnetic interference (EMI) shielding materials have begun to converge green and sustainable biomass materials. These offer numerous advantages such as being lightweight, porous, hierarchical. Due their porous nature, interfacial compatibility, electrical conductivity, hold significant potential EMI Despite concerted the of been reported, this research area is still relatively new compared traditional In particular, a more comprehensive study summary factors influencing including pore structure adjustment, preparation process, micro-control would be valuable. The methods characteristics wood, bamboo, cellulose lignin in field are critically discussed paper, similar summarized analyzed. composite fillers various were reviewed. paper also highlights mechanism well existing prospects challenges for development trends field.

Language: Английский

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Hierarchical Engineering on Built‐In Electric Field of Bimetallic Zeolitic Imidazolate Derivatives Towards Amplified Dielectric Loss

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 7, 2024

Abstract Construction of built‐in electric field (BIEF) in nanohybrids has been demonstrated as an efficacious strategy to boost the dielectric loss by facilitating oriented transfer and transition charges, thus optimizing electromagnetic wave absorption property. However, specific influence BIEF on interface polarization needs explore thoroughly strength should be further augmented. Herein, several systems incorporated Mott–Schottky heterojunctions hollow structures are designed constructed, where bimetallic zeolitic imidazolate framework employed derive Cu‐ZnO heterojunctions, hierarchical enriched introducing structure reduced graphene oxide. The well‐established “double” verified theoretical calculation engineering can regulate conductivity, enhance relaxation effectively. Especially, there always coexisted both enhanced charge separation reversed distribution this BIEF, boosting polarization. Attributing synergy well‐matched impedance amplified loss, obtained hybrids exhibited superior (reflection −46.29 dB ultra‐wide effective bandwidth 7.6 GHz at only 1.6 mm). This work proves innovative model for dissecting mechanisms pioneers a novel advanced absorbers through enhancing BIEF.

Language: Английский

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Spontaneous Orientation Polarization of Anisotropic Equivalent Dipoles Harnessed by Entropy Engineering for Ultra-Thin Electromagnetic Wave Absorber

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)

Published: Sept. 26, 2024

Abstract The synthesis of carbon supporter/nanoscale high-entropy alloys (HEAs) electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engineering conductive/dielectric genes. Electron migration modes within HEAs manipulated electronegativity, valence electron configurations and molar proportions constituent elements determine steady state efficiency equivalent dipoles. Herein, enlightened skin-like effect, a reformative using carbonized cellulose paper (CCP) supporter is used to preserve oxygen-containing functional groups (O·) fibers (CCF). Nucleation construction emblematic shell-core CCF/HEAs heterointerfaces are inextricably linked metabolism induced O·. Meanwhile, mode switchable electron-rich sites promotes orientation polarization anisotropic By virtue reinforcement strategy, CCP/HEAs composite prepared 35% ratio Mn element (CCP/HEAs-Mn 2.15 ) achieves efficient wave (EMW) absorption − 51.35 dB at ultra-thin thickness 1.03 mm. mechanisms resulting dielectric properties HEAs-based EMW absorbing materials elucidated combining theoretical calculations with experimental characterizations, which provide bases feasible strategies simulation practical application devices (e.g., ultra-wideband bandpass filter).

Language: Английский

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Zeolite imidazolate framework derived efficient absorbers: from morphology modulation to component regulation

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1010, P. 177092 - 177092

Published: Oct. 16, 2024

Language: Английский

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Dual magnetic particles modified carbon nanosheets in CoFe/Co@NC heterostructure for efficient electromagnetic synergy

Soft Science, Journal Year: 2024, Volume and Issue: 4(4)

Published: Nov. 30, 2024

Dual magnetic particles-modified carbon materials have great potential in terms of ultrathin thickness (≤ 2 mm) and super electromagnetic wave (EMW) absorption -70 dB). Herein, using CoFe-metal-organic framework (MOF)-derived CoFe/Co@NC heterostructures composed hollow CoFe nanospheres, solid Co nitrogen-doped (NC) nanosheets, we demonstrate how the dual particles regulate response behavior heterostructure thus steer efficient EMW performance. That is, inherits an ultra-strong reflection loss (R L) -73.8 dB at 1.78 mm. The effective bandwidth (EAB) value is also available up to 5.4 GHz. Moreover, computer simulation technology (CST) simulations reveal good radar stealth effect heterostructures. Experimentally, outstanding due a large number heterointerfaces, conductive networks nanoparticles, which bring considerable interface polarization, conduction loss, characteristics. These findings underscore importance synergy induced by for steering absorbers.

Language: Английский

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Multidimensional micro-nano heterostructures composed of nanofibers and micro dodecahedrons for electromagnetic wave attenuation and energy conversion

Journal of Material Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Electromagnetic Wave Absorbing Properties of Flexible Thermal Conductive ZnO@FeSiAl Silicone Rubber

Materials Today Nano, Journal Year: 2025, Volume and Issue: unknown, P. 100587 - 100587

Published: Feb. 1, 2025

Language: Английский

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Multiscale Design of Dielectric Composites for Enhanced Microwave Absorption Performance at Elevated Temperatures

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

Abstract Aerospace vehicles and electronic devices are often operated in elevated temperature environments, which has led to an increased demand for high‐temperature microwave absorbing materials (MAMs). The absorption properties of MAMs influenced not only by the intrinsic material characteristics but also micro‐, meso‐, macro‐structural configurations composites. This paper reviews recent advancements through a multiscale design approach. Due sensitivity permittivity, tend exhibit reflection behavior at temperatures. Strategies aimed regulating conductivity polarization can enhance impedance matching under these conditions; however, this results unavoidable reduction loss capability. In contrast traditional methodologies, constructed from subwavelength‐scale functional units achieve remarkable anti‐reflection effects discrete unit distribution, thereby significantly optimizing both dielectric capacity matching. Furthermore, equivalent electromagnetic parameters metacomposites intrinsically linked their physical structural attributes. relationship offers novel strategy enhancing performance. It is anticipated that review will provide insightful guidance future explorations into innovative highly efficient MAMs.

Language: Английский

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