Design of Flexible MXene/Graphene-Based Fiber Fabrics for Broadband Electromagnetic Wave Absorption

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

Published: March 28, 2025

Language: Английский

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Thermoresistive Network in Phase‐Transition Hydrogel: Achieving on/off Switchable Electromagnetic Interference Shielding

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

Published: April 4, 2025

Abstract Intelligent electromagnetic interference (EMI) shielding materials, with their tunable EM wave response characteristics, have attracted much attention. However, the molecular‐level mechanism is under‐explored and tuning range narrow. This study proposes an EMI switch hydrogel based on molecular precision manipulation of a thermoresistive network capable adaptively regulating performance. It has two temperature‐controlled switching states: on/off strong/weak shielding. The consists interpenetrating polyvinyl alcohol (PVA) poly(N‐isopropylacrylamide) (PNIPAM) networks, giving it thermal shrinkable properties. A temperature‐induced high contact resistance MXene‐carbon nanotubes (MXene‐CNTs) conductive assembled within it. combination enables to switchable performance in X‐band, 9.3–53.9 dB at different temperatures or thicknesses. remarkable results from synergistic effect temperature‐driven shrinkage matrix network, involving adjustments particle stacking, conductivity, transmission path. MXenes offer remote‐controlled photothermal‐responsive Significantly, hydrogel's self‐healing properties allow endure damage its can be quickly restored. work paves new way for rational design adaptive devices level.

Language: Английский

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Transparent and Tunable Radar‐Infrared Bi‐Stealth Metamaterial Based on Water and Metallic Mesh for Optical Window Applications

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

Published: April 15, 2025

Abstract In this paper, we present a transparent and tunable radar‐infrared bi‐stealth metamaterial consisting of an infrared shielding layer (IRSL), radar‐absorbing (RAL), water substrate, metal meshed reflective backplane. The IRSL consists array indium tin oxide square patches, reducing emissivity transmitting microwaves. the RAL, ultrathin metallic meshes with different periods are integrated into one to broaden microwave absorption bandwidth. Moreover, substrate facilitates tunability performance via its fluidity. Experimental measurements simulations indicate that fabricated sample can achieve over 90% within wide frequency range 3.6–15.8 GHz relative bandwidth 126%. band be further switched 3.6–5.9 11.2–13.8 by simply adjusting thickness. addition, low ≈0.37 is achieved in atmospheric window (8–14 µm), while measured average optical transmittance reaches 65.5% at 400–800 nm. main advantage proposed compatibility across visible, infrared, regions simultaneous realization high transparency, reduced emissivity, broadband switchable absorption. Given these multiple functionalities superior performances, has great application potential aircraft windows, glass curtain walls buildings, counter‐surveillance devices, wireless communication systems.

Language: Английский

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Mn/Sn-Based Sulfides/Graphite Nanosheet Composites for Electromagnetic Wave Absorption

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Language: Английский

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