Kirkendall Effect‐Induced Ternary Heterointerfaces Engineering for High Polarization Loss MOF‐LDH‐MXene Absorbers

Small, Journal Year: 2024, Volume and Issue: 20(48)

Published: Aug. 29, 2024

Heterogeneous interfacial engineering has garnered widespread attention for optimizing polarization loss and enhancing the performance of electromagnetic wave absorption. A novel Kirkendall effect-assisted electrostatic self-assembly method is employed to construct a metal-organic framework (MOF, MIL-88A) decorated with Ni-Fe layered double hydroxide (LDH), forming multilayer nano-cage coated Ti

Language: Английский

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Constructing Built-In Electric Fields with Semiconductor Junctions and Schottky Junctions Based on Mo–MXene/Mo–Metal Sulfides for Electromagnetic Response

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: June 11, 2024

Abstract The exploration of novel multivariate heterostructures has emerged as a pivotal strategy for developing high-performance electromagnetic wave (EMW) absorption materials. However, the loss mechanism in traditional is relatively simple, guided by empirical observations, and not monotonous. In this work, we presented semiconductor–semiconductor–metal heterostructure system, Mo–MXene/Mo–metal sulfides (metal = Sn, Fe, Mn, Co, Ni, Zn, Cu), including semiconductor junctions Mott–Schottky junctions. By skillfully combining these distinct functional components (Mo–MXene, MoS 2 , metal sulfides), can engineer multiple heterogeneous interface with superior capabilities, broad effective bandwidths, ultrathin matching thickness. successful establishment gives rise to built-in electric field that intensifies electron transfer, confirmed density theory, which collaborates dielectric polarization mechanisms substantially amplify EMW absorption. We detailed synthesis series featuring both semiconductor–semiconductor semiconductor–metal interfaces. achievements were most pronounced Mo–MXene/Mo–Sn sulfide, achieved remarkable reflection values − 70.6 dB at thickness only 1.885 mm. Radar cross-section calculations indicate MXene/Mo–metal have tremendous potential practical military stealth technology. This work marks departure from conventional component design limitations presents pathway creation advanced MXene-based composites potent capabilities.

Language: Английский

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Molecular Intercalation‐Induced Two‐Phase Evolution Engineering of 1T and 2H‐MS₂ (M = Mo, V, W) for Interface‐Polarization‐Enhanced Electromagnetic Absorbers

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

Published: May 10, 2024

Abstract Polarization at interfaces is an important loss mechanism for electromagnetic wave (EMW) attenuation, though the motion behavior of carriers in composed different types conductors has yet to be investigated. Tuning phase structure transition metal dichalcogenides (TMDs) MS 2 (M = Mo, V, W) by organics small molecule intercalation achieve modulation interfacial effective strategy, where 1T‐MS exhibits metallic properties and 2H‐MS semiconducting properties. To exclude contribution intrinsic TMDs materials, three (MoS , VS WS ), which also possess transitions, are Among them, composite excellent EMW absorption performance under synergistic effect polarization conduction loss. 1T‐MoS /MOF‐A best with RL min −61.07 dB a thickness 3.0 mm EAB 7.2 GHz 2.3 mm. The effectiveness using 1T‐phase 2H‐phase demonstrated, analysis carrier during

Language: Английский

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Multiple Tin Compounds Modified Carbon Fibers to Construct Heterogeneous Interfaces for Corrosion Prevention and Electromagnetic Wave Absorption

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

Published: Sept. 27, 2024

Abstract Currently, the demand for electromagnetic wave (EMW) absorbing materials with specific functions and capable of withstanding harsh environments is becoming increasingly urgent. Multi-component interface engineering considered an effective means to achieve high-efficiency EMW absorption. However, modulation has not been fully discussed great potential in field In this study, multi-component tin compound fiber composites based on carbon (CF) substrate were prepared by electrospinning, hydrothermal synthesis, high-temperature thermal reduction. By utilizing different properties substances, rich heterogeneous interfaces are constructed. This effectively promotes charge transfer enhances interfacial polarization conduction loss. The SnS/SnS 2 /SnO /CF abundant have exhibit excellent absorption at a loading 50 wt% epoxy resin. minimum reflection loss (RL) − 46.74 dB maximum bandwidth 5.28 GHz. Moreover, composite coatings exhibited long-term corrosion resistance Q235 steel surfaces. Therefore, study provides strategy design complex environments.

Language: Английский

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Manipulating cellulose-based dual-network coordination for enhanced electromagnetic wave absorption in magnetic porous carbon nanocomposites

Composites Communications, Journal Year: 2024, Volume and Issue: 48, P. 101922 - 101922

Published: April 30, 2024

Language: Английский

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Harnessing the Electronic Spin States of Single Atoms for Precise Electromagnetic Modulation

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

Published: Dec. 27, 2024

Abstract By manipulating their asymmetric electronic spin states, the unique structures and unsaturated coordination environments of single atoms can be effectively harnessed to control magnetic properties. In this research, first investigation is presented into regulation properties through states atoms. Magnetic single‐atom one‐dimensional materials, M‐N‐C/ZrO 2 (M = Fe, Co, Ni), with varying are design synthesize based on orbital structure model. The SAs 3 d electron composite M‐N‐C modulates magneto physical triggers a natural resonance loss, which achieves controllable tuning effective absorption band under low‐frequency conditions. minimum reflection loss ( RL min ) reach ‐69.71 dB, bandwidth EAB ratio as high 91% (2–18 GHz). current work provides path toward achieving modulation electromagnetic wave bands by exploring mechanism atomic even level interactions influence modulation.

Language: Английский

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Magneto-Dielectric Synergy and Multiscale Hierarchical Structure Design Enable Flexible Multipurpose Microwave Absorption and Infrared Stealth Compatibility

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

Published: Oct. 16, 2024

Developing advanced stealth devices to cope with radar-infrared (IR) fusion detection and diverse application scenarios is increasingly demanded, which faces significant challenges due conflicting microwave IR cloaking mechanisms functional integration limitations. Here, we propose a multiscale hierarchical structure design, integrating wrinkled MXene shielding layer flexible Fe

Language: Английский

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Tuning the Multilevel Hierarchical Microarchitecture of MXene/rGO‐Based Aerogels Through a Magnetic Field‐Guided Strategy Toward Stepwise Enhanced Electromagnetic Wave Dissipation

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

Published: June 5, 2024

Abstract Hierarchical microarchitecture engineering is a state‐of‐the‐art approach to designing aerogel electromagnetic (EM) wave absorbers, offering huge potential in improving EM energy dissipation. However, the intrinsic feedback mechanism regarding specific influence of each parameter on properties not comprehensively revealed, making it challenging fully utilize aerogels achieve superior absorption performance. Herein, range MXene/rGO‐based with multilevel hierarchical configurations are fabricated by magnetic field‐guided strategy. Leveraging growth thermodynamics effects under field and bridging effect between adjacent rGO units, three models (lamellae ordering, interlayer spacing, layer thickness) constructed aerogels. Remarkably, progressively improve reflection loss ( RL ), effective bandwidth (EAB), matching thickness enhancing dielectric loss, decoupling attenuation‐impedance matching, adjusting power density, respectively. Consequently, exhibit stepwise enhancement performance, achieving −64.6 dB broad EAB 7.0 GHz at 1.8 mm thickness, surpassing alternative other configurations. This work elucidates synergistic multi‐effect dissipation waves aerogels, providing insights for advanced absorbers through diverse strategies.

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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Fabrication of graphene/polyimide/Co-N-C aerogel with reinforced electromagnetic losses and broadband absorption for highly efficient microwave absorption and thermal insulation

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 152976 - 152976

Published: June 9, 2024

Language: Английский

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