Enhanced Dielectric Loss Induced by Asymmetrically Coordinated Iron Single‐Atoms with Curved Configurations on Turing‐Like Surfaces for Electromagnetic Wave Absorption

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 15, 2024

Abstract Curved support can significantly change the electronic structure of a metal single‐atom (M‐SA) and thereby fine tune its intrinsic physicochemical properties. However, constructing asymmetrically coordinated M‐SAs on highly curved supports remains challenging. Here, an efficient strategy driven by different thermal decomposition rates two polymers is proposed to create Turing surface with stripes hollow carbon spheres (HCSs) for anchoring Fe‐N 3 S 1 moieties. Experimental theoretical calculation results reveal that asymmetric atoms strain Fe─N bonds induced efficiently break symmetric distribution charge around Fe enhance dielectric loss HCSs, synergistically improving electromagnetic wave absorption property. Remarkably, film constructed ‐anchored HCSs natural rubber exhibits wide effective bandwidth 7.68 GHz at filling ratio 6%. Moreover, also possesses excellent hydrophobicity, frost‐resistant ability, adhesiveness, flexibility, stretchability, heat‐dispersion which expand practical applications into various environments. This work provides insights synergistic effects configurations their properties offers new method preparation multifunctional films.

Язык: Английский

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Revealing electrostatic-manipulated self-assembly mechanism helps to readily design enhanced MOF-derived microwave absorbers

Carbon, Год журнала: 2024, Номер 227, С. 119289 - 119289

Опубликована: Май 28, 2024

Язык: Английский

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High‐Density Dual Atoms Pairs Coupling for Efficient Electromagnetic Wave Absorbers

Small, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 27, 2024

Abstract Dual atoms (DAs), characterized by flexible structural tunability and high atomic utilization, hold significant promise for atom‐level coordination engineering. However, the rational design with high‐density heterogeneous DAs pairs to promote electromagnetic wave (EMW) absorption performance remains a challenge. In this study, Ni─Cu coupled absorbers are precisely constructed on nitrogen‐rich carbon substrate, achieving an impressive metal loading amount of 4.74 wt.%, enabling huge enhancement effective bandwidth (EAB) EMW from 0 7.8 GHz. Furthermore, minimum reflection loss (RL min ) is −70.96 dB at matching thickness 3.60 mm, corresponding >99.99% incident energy. Both experimental results theoretical calculations indicate that synergistic effect sites in transfer electron‐rich initial N Cu sites, which induces strong asymmetric polarization redistribution local charge significantly improves performance. This work not only provides strategy preparation DA but also demonstrates role tuning symmetry level.

Язык: Английский

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Dimensional Self‐Assembled Magnetic Coupling via Embedding Ferromagnetic Nanoparticles in Multi‐Channel Fibers for Microwave Absorption

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 28, 2024

Abstract 1D magnetic fibers with significant morphological diversity and anisotropy are highly desirable for optimizing properties electromagnetic responsiveness. However, it remains challenging the precise control over internal interactions within each fiber. Herein, a strategy self‐assembled coupling is taken to achieve controllable reconstruction of continuous multiple networks single High‐density ultrafine cobalt nanoparticles uniformly embedded inside carbon framework multi‐channel structure (Co@MCF). This establishes complex response system characterized by inherent inter‐fiber refined intra‐fiber self‐assembling coupling. The distinctive distribution flux lines demonstrates enhanced sensitivity. results in minimum reflection loss −57.65 dB broadband absorption frequency range 7.28 GHz at 1.9 mm, effectively covers entire Ku band substantial portion X band. enhances understanding relationship between microstructure performance fibers. Additionally, positions Co@MCF as competitive candidate microwave applications.

Язык: Английский

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Preparation of high-performance bitumen carbon-based microwave absorbing materials from different coal bitumens toward efficient treatment of industrial waste bitumen

Sustainable materials and technologies, Год журнала: 2024, Номер 40, С. e00966 - e00966

Опубликована: Май 7, 2024

Язык: Английский

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Heterodimensional structure with enhanced interface loss for microwave absorption and EMI shielding

Science China Materials, Год журнала: 2024, Номер 67(12), С. 4021 - 4030

Опубликована: Ноя. 6, 2024

Язык: Английский

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Multi-heterogeneous interfaces boost dielectric polarization in PBA-derived Co/MnO@NC ternary composites for electromagnetic wave absorption

Carbon, Год журнала: 2024, Номер unknown, С. 119633 - 119633

Опубликована: Сен. 1, 2024

Язык: Английский

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Heterogeneous nanospheres comprising FeCo core encapsulated in double-shelled carbon for high-efficiency electromagnetic wave absorption

Journal of Materials Science Materials in Electronics, Год журнала: 2025, Номер 36(1)

Опубликована: Янв. 1, 2025

Язык: Английский

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Advances and Future Trends in Nanozyme-Based SERS Sensors for Food Safety, Environmental and Biomedical Applications

International Journal of Molecular Sciences, Год журнала: 2025, Номер 26(2), С. 709 - 709

Опубликована: Янв. 15, 2025

Nanozymes, a kind of nanoparticles with enzyme-mimicking activities, have attracted considerable attention due to their robust catalytic properties, ease preparation, and resistance harsh conditions. By combining nanozymes surface-enhanced Raman spectroscopy (SERS) technology, highly sensitive selective sensors been developed. These are capable detecting wide range analytes, such as foodborne toxins, environmental pollutants, biomedical markers. This review provides an overview recent advancements in the synthesis surface modification nanozymes, highlighting ability mimic multiple enzymes enhance performance. In addition, we explore development applications nanozyme-based SERS food contaminants, The concludes perspectives challenges facing field, involving need for deeper understanding nanozyme principles mechanisms, standardized systems characterization, engineering tailored properties specific applications. Finally, discuss potential integrating various techniques create multi-modal detection platforms, paving way next generation analytical tools fields safety, monitoring, diagnostics.

Язык: Английский

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Highly compressible composite aerogel elastomers aided by FeCoNi alloys and carbon nanotubes for electromagnetic wave absorption and piezoresistive sensing

Composites Part A Applied Science and Manufacturing, Год журнала: 2025, Номер unknown, С. 108755 - 108755

Опубликована: Янв. 1, 2025

Язык: Английский

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