Enhanced Interfacial Polarization Loss of FeS/MoS₂@N‐Doped Carbon Sandwich‐Walled Nanotubes Enables High‐Performance Electromagnetic Wave Absorption

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 3, 2025

Abstract Multiple interfaces and hollow structures are vital to high‐performance electromagnetic wave (EMW) absorption of absorbers. However, it remains difficult construct tune such structures, there is limited understanding regarding the relationships between their structural dielectric loss properties. Herein, theoretical simulations for EMW performance sandwich solid double‐layer first carried out found that former exhibits a more pronounced power density than latter. Then, ligand‐exchange strategy following vulcanization process fabricate FeS/MoS 2 @N‐doped carbon sandwich‐walled nanotubes (FeMoS‐SWCNTs) dveloped. The experimental results demonstrate FeMoS‐SWCNTs show significantly enhanced compared FeS counterparts, consistent with simulation results. Further functional theory calculations reveal properties attributed stronger interfacial polarization resulting from electronic interactions at multiple (FeS/N‐doped (NC), MoS /NC, ), conduction caused by higher states in heterostructure. These findings elucidate relationship nanotube properties, developed method offers feasible approach rational design applications.

Язык: Английский

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The polarization loss induced by interfacial charge redistribution using Ar plasma treatment in Ni@C composites for superior microwave absorption performance

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160489 - 160489

Опубликована: Фев. 1, 2025

Язык: Английский

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Engineering Structural Anisotropy for Visualizing and Controlling Nanomagnetic Interactions with High‐Frequency Electromagnetic Wave

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 11, 2025

Abstract Structural anisotropy in micro‐ and nanoscale magnetic materials is critical for their response to high‐frequency electromagnetic (EM) fields. However, controlling visualizing these properties at the remains a significant challenge. In this study, it proposes strategy directional regulation of iron‐based materials. By manipulating particle structures, preferential orientation designs are achieved, resulting spherical, spindle‐shaped, symmetrical hexagonal cone‐shaped, disc‐shaped morphologies. Utilizing off‐axis electron holography micromagnetic simulations, observes that material's EM waves intensifies with increasing structural anisotropy. This enhanced directly influences permeability, enabling effective modulation waves. Building on insights, spindle‐shaped structures developed strong uniaxial anisotropy, achieving microwave absorption surpassing Snoek limit. These exhibit an initial permeability up 2.03, 35% improvement over isotropic structures. They cover 4.58–7.88 GHz range, providing across more than 50% wireless communication band thin coating just 3.0 mm, outperforming existing absorbers. Notably, bands predominantly lie within civilian frequency ranges (2–8 GHz), offering pollution protection 5G future 6G technologies.

Язык: Английский

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Hollow but perforated C/Co/Mo₂C cubes enhance electromagnetic absorption

Journal of Materials Chemistry A, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

A precise and flexible strategy has been developed to prepare hollow C/Co/Mo 2 C cubes for enhanced electromagnetic wave absorption.

Язык: Английский

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Nano-Arrayed Cu2S@MoS2 Heterojunction SERS Sensor for Highly Sensitive and Visual Detection of Polystyrene in Environmental Matrices

Talanta, Год журнала: 2025, Номер 292, С. 127934 - 127934

Опубликована: Март 12, 2025

Язык: Английский

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Nano‐Organic r‐GO‐Hybrid Microwave Absorber for Electromagnetic–Thermal–Mechanical Coupled Response and Self‐Adaptive Electromagnetic Devices

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Abstract Elastic electromagnetic‐attenuation materials attract great attention for their extensive use both in civil communication and military stealth. Nevertheless, applications as intelligent remain less developed due to insufficient understanding of constructing highly efficient stimulus‐response structures. Herein, reduced‐graphene‐oxide‐hybridized polymeric absorbers (GPAs) are prototyped enable multi‐field coupled responses based on electromagnetic (EM) attenuation smart deformation. A nano‐organic hybrid structure is stabilized via intermolecular interactions between rGO conjugated liquid crystal molecules. It found that the dielectric polarization dominates attenuation, converting EM energy into thermal inducing mechanical The GPA incorporating 0.25 wt.% exhibits an average constant 5.7 times higher than pure absorber. Under open‐space microwave irradiation, optimal response time GPAs reduced by 85% ≈10 s. Based electromagnetic‐thermal‐mechanical GPAs, devices including a reconfigurable frequency selective surface customized microwave‐absorbing conceived, achieving transformation over 2.4 GHz radar reflection intensity. This study bridges gap from elastic material dissipative will furnish novel insights developing devices.

Язык: Английский

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Multilayer hollow Cu/Ni@NC@Cu2-xS nano-boxes with superior low frequency microwave absorption properties

Materials Today Nano, Год журнала: 2025, Номер unknown, С. 100625 - 100625

Опубликована: Апрель 1, 2025

Язык: Английский

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Heterogeneous Interface Engineering of 1D Hybrid Nanobelts Decorated with Mo₂N–Mo_xC Nanoparticles for Boosting Microwave Absorption

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 23, 2025

Язык: Английский

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Application of carbon-based MOF derived Fe/C composites toward excellent microwave absorption

Materials Science and Engineering B, Год журнала: 2024, Номер 312, С. 117786 - 117786

Опубликована: Ноя. 22, 2024

Язык: Английский

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Epitaxial Growth of Hierarchical Cu_xS Heterostructures for Broadband Dielectric Response

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 4, 2024

Abstract When interacting with an external Electromagnetic (EM) field, symmetric nanostructures, characterized by their periodic crystalline arrangement, typically resonate at specific frequencies. This resonance enhances local electromagnetic fields, leading to strong EM absorption, yet within a narrow absorption range. Conversely, asymmetric distinguished complex electric field polarization and distributions, provide broader frequency responses, albeit generally weaker loss across the broadband. Therefore, striking balance between wideband using either or nanostructures remains challenge. Here, nanostructured epitaxial step‐growth technique is demonstrated that fabricates Cu x S multilevel rod‐like heterostructure overall axial symmetry. structure introduces localized asymmetry through variations in component hierarchy rod dimensions during growth process, effectively addressing aforementioned absorption. Experimental evidence theoretical simulations confirm possessing these characteristics achieve efficient broadband 6.3 GHz bandwidth just 2.0 mm thickness, owing generation of multiple continuous fields enhanced polarization. It convincing this methodology design concept hold enlightening significance for advancing material technological innovations realm

Язык: Английский

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