Hetero‐Dimensional Micro‐Nano Architectures Toward Electromagnetic Devices and Hybrid Energy Transport

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

Published: Nov. 14, 2024

Abstract Human spaceflight, lunar exploration projects, and interstellar travel are the grand visions of human universe. However, energy sustainability these projects is a concern. Electromagnetic functional materials devices expected to fulfill their potential in electronic communication utilization. Herein, hetero‐dimensional micro‐nano architectures composed Cu 3 Se 2 microspheres reduced graphene oxide (rGO) sheets fabricated for first time by sacrificial template method, anion substitution engineering, electrostatic adsorption, reduction‐oxidation reaction. Based on excellent electromagnetic response composites, they exhibit strong ultra‐wide microwave absorption ability with effective bandwidth (EAB) reaching 8.24 GHz at thickness 2.2 mm. In addition, an metamaterial EAB ≈13.5 proposed, exhibiting significant properties. More significantly, composites can be used construct range devices: spiral antenna adjustable return loss gain, maximum gain up 2.5 dBi; microstrip power divider that efficiently split input signal into four equal parts output it; hybridized transport device convert store energy. This work provides new inspiration protection, communication, development.

Language: Английский

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The Optimized Design of Sandwich Structured SiO₂/C@SiC/SiO₂ Composites Through Numerical Simulation for Temperature‐Resistant Radar and Infrared Compatible Stealth

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

Published: Dec. 12, 2024

Abstract In contemporary times, radar and infrared‐compatible stealth materials have emerged as a pivotal domain of research globally, aimed at augmenting the survivability military assets. However, current candidates generally exhibit subpar compatibility performance in elevated temperature environments due to imbalanced interplay between two spectral bands. this work, meticulously designed sandwich‐structure SiO 2 /C@SiC/SiO composite is proposed cope with challenge. The middle layer C@SiC composites possesses excellent microwave absorption even high temperatures. outer layers aerogels serve not only inhibit infrared radiation intensity, but also reinforce capacity by optimizing impedance matching reducing heat transferred layer. Based on numerical simulation outcomes, thickness each has been optimized attain harmonious balance properties. Ultimately, sandwich structured demonstrate low RL (reflection loss) values (←5 dB) across nearly entire X band (8–12 GHz), alongside minimal surface temperatures hovering ≈44 °C an ambient 200 °C. comprehensive investigation into impact patterns underlying mechanisms offers invaluable insights develop for high‐temperature applications, which can be applied coatings skin Mach number aircraft.

Language: Английский

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Synergistic Polarization Relaxation in Heteroatom‐Optimized Heterointerfaces for Electromagnetic Wave Absorption

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

Published: Feb. 24, 2025

Abstract The regulation of heteroatoms and heterogeneous interface characteristics has emerged as a promising strategy to enhance electromagnetic wave (EMW) absorption. However, challenges remain in precisely controlling heteroatom doping fully understanding the synergistic mechanisms between interfaces. Here, novel is proposed for enhancing polarization relaxation through optimization. Carbon nanofiber (CNF)‐based Ni–Fe nanocubes decorated with N O are synthesized by pyrolyzing Fe‐based metal–organic frameworks under different atmospheres (NH 3 , H 2 /Ar, Ar). results show that N, play crucial role effect regulating electronic structure diverse structures. Finally, Fe N@Ni Fe/CNFs exhibit excellent EMW absorption at 2.3 mm, minimum reflection loss −56.75 dB, an effective bandwidth 6.7 GHz. Additionally, these materials display remarkable corrosion resistance due their unique fiber network structure. This study highlights optimizing effects, offering valuable insights design advanced heteroatom‐optimized heterointerfaces.

Language: Английский

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Heterodimensional Structure Integrating Electromagnetic Functions and Hybrid Energy Storage to Drive Multifunctional Devices

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

Published: March 5, 2025

Abstract Electronic devices are becoming portable, miniaturized, and high performance, more widely used in emerging complex fields. Electromagnetic functional materials with multiple functions that can be applied to scenarios urgently need developed. This research assembled a multifunctional magnetic heterodimensional structure through interface defect engineering, conceived an innovative hybrid energy storage device antenna. The exhibits excellent microwave absorption, electromagnetic interference (EMI) shielding properties. minimum reflection loss is −57.06 dB at 6.16 GHz, the optimal EMI effectiveness 74.08 18 GHz. At current densities of 0.5 3 A g −1 , discharge/charge specific capacities remain 836.64/820.48 401.4/401.7 mAh after 300 500 cycles, respectively. Hybrid convert into electrical for storage. antenna shows harvesting characteristic S, C, X, Ku multi‐bands. |S 11 | reach −65.6 tuned by adjusting dielectric substrate thickness. work will furnish new prospects design development scenarios.

Language: Английский

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Absorption–Reflection–Transmission Power Coefficient Guiding Gradient Distribution of Magnetic MXene in Layered Composites for Electromagnetic Wave Absorption

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: Feb. 17, 2025

Abstract The morphological distribution of absorbent in composites is equally important with absorbents for the overall electromagnetic properties, but it often ignored. Herein, a comprehensive consideration including component regulation, layered arrangement structure, and gradient concentration was used to optimize impedance matching enhance loss. On microscale, incorporation magnetic Ni nanoparticles into MXene nanosheets (Ni@MXene) endows suitable intrinsic permittivity permeability. macroscale, Ni@MXene increases effective interaction area waves, inducing multiple reflection/scattering effects. this basis, according analysis absorption, reflection, transmission (A–R–T) power coefficients composites, constructed realize at low-concentration surface layer, loss middle interlayer microwave reflection high-concentration bottom layer. Consequently, composite (LG5-10–15) achieves complete absorption coverage X-band thickness 2.00–2.20 mm RL min −68.67 dB 9.85 GHz 2.05 mm, which 199.0%, 12.6%, 50.6% higher than non-layered, descending respectively. Therefore, work confirms importance structure improving performance broadens design high-performance materials.

Language: Английский

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Heterogeneous interface engineering of rod-like M−Mo−N (M = Co, Ni) bimetallic nitrides for efficient microwave absorption

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162400 - 162400

Published: Jan. 1, 2025

Language: Английский

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High-Temperature Stealth Across Multi-Infrared and Microwave Bands with Efficient Radiative Thermal Management

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: March 24, 2025

Abstract High-temperature stealth is vital for enhancing the concealment, survivability, and longevity of critical assets. However, achieving across multiple infrared bands—particularly in short-wave (SWIR) band—along with microwave efficient thermal management at high temperatures, remains a significant challenge. Here, we propose strategy that integrates an IR-selective emitter (Mo/Si multilayer films) metasurface (TiB 2 –Al O 3 –TiB ) to enable multi-infrared band stealth, encompassing mid-wave (MWIR), long-wave (LWIR), SWIR bands, (X-band) 700 °C, simultaneous radiative cooling non-atmospheric window (5–8 μm). At device exhibits low emissivity 0.38/0.44/0.60 MWIR/LWIR/SWIR reflection loss below − dB X-band (9.6–12 GHz), 0.82 5–8 μm range—corresponding power 9.57 kW m −2 . Moreover, under input 17.3 —equivalent aerodynamic heating Mach 2.2—the demonstrates temperature reduction 72.4 °C compared conventional low-emissivity molybdenum surface temperatures. This work provides comprehensive guidance on high-temperature design, far-reaching implications multispectral information processing extreme environments.

Language: Английский

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Electromagnetic stealth technology: A review of wave-absorbing structures

Materials & Design, Journal Year: 2025, Volume and Issue: unknown, P. 113891 - 113891

Published: March 1, 2025

Language: Английский

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Multiphase Co/Ni metal nitrides with heterointerfaces for enhanced interfacial polarization loss in electromagnetic wave absorption

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

Published: April 1, 2025

Language: Английский

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Waste leaves into biomass carbon materials with tunable oxygen-containing functional groups for microwave absorption

Carbon, Journal Year: 2024, Volume and Issue: unknown, P. 119930 - 119930

Published: Dec. 1, 2024

Language: Английский

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