A Rapidly Assembled and Camouflage‐Monitoring‐protection Integrated Modular Unit

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

Published: Dec. 17, 2024

Optical-electromagnetic compatible devices are urgently required in intelligent building monitors and cross-band protection. Meanwhile, the insufficient systematicness semi-empirical attempts significantly limit prosperity of materials, causing enormous challenges for deviceization material database construction. Herein, systematical component-deviceization-machine learning prediction-array construction strategy is attempted to solve bottleneck issues. A luminance-triggered camouflage-monitoring-protection triune integrated modular unit (IMU) hierarchically encapsulated simultaneously achieve efficient anti-electromagnetic interference (EMI), light-absorbing, quick gradient-colorization response. Moreover, an illumination intensity dataset a surrogate model based on fully connected neural network fitting (FCNN-fitting) constructed, which accurately predicts light-absorbing property IMUs can be instructional selection. The specifically assembled into 4*4 array, aiming at multi-scenario application programmable display, camouflage pattern, surface conformality, rapid replaceability. This work paves path provides promising optical-electromagnetic compatibility genetics-deviceization-array systematization.

Language: Английский

---

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

---

Multi-interface engineering design of nitrogen-doped bamboo-based carbon/Fe/Fe3C composite electromagnetic wave absorber based on honeycomb-ant nest-like structure

Composites Communications, Journal Year: 2024, Volume and Issue: 51, P. 102040 - 102040

Published: Aug. 17, 2024

Language: Английский

---

Optimizing MOF‐Derived Electromagnetic Wave Absorbers through Gradient Pore Regulation for Pareto Improvement

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

Published: Sept. 9, 2024

Abstract Porous materials emerging as potential high‐efficiency electromagnetic (EM) wave absorbers confront a critical trade‐off between impedance matching and attenuation capability. In this study, versatile strategy is reported to overcome challenge by constructing gradient pores via solvent‐assisted linker exchange for the fabrication of metal‐organic framework (MOF) derived Fe/Fe 3 Co 7 /Co/C composites with high porosity. The characteristics single‐pored gradient‐pored derivatives are investigated through combined experimental simulation approaches. Simulated space EM field, loss density, Smith charts reveal significantly enhanced interactions optimized within pores. Compared individual MOF derivatives, derivative exhibits improved from large‐pored shell superior capability small‐pored core, giving rise Pareto improvement in absorption strong reflection (−64.7 dB) wide effective adsorption bandwidth (5.8 GHz) at thickness 2.5 mm. This work not only advances novel pore efficient capability, but also sheds light on underlying mechanisms interaction varied porosity, offering insights extended designs magnetic, electric optic devices.

Language: Английский

---

Bridging dielectric-magnetic synergistic units with MOFs on fibers structure for high-efficient microwave absorption at low filler loading

Carbon, Journal Year: 2024, Volume and Issue: 229, P. 119444 - 119444

Published: July 14, 2024

Language: Английский

---

High-entropy TiVNbMoC3Tx MXene hybrid with balanced dielectric-magnetic loss for high-efficient electromagnetic wave absorption with environmental stability

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 499, P. 156024 - 156024

Published: Sept. 20, 2024

Language: Английский

---

Shifting d‐band Center: An Overlooked Factor in Broadening Electromagnetic Wave Absorption Bandwidth

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

Published: Aug. 27, 2024

Abstract Absorption bandwidth is one of the key performance metrics for electromagnetic wave (EMW) absorbers. Traditional oxide absorbers, despite their merits such as abundance, long‐term stability, and low cost, have long been plagued by inferior absorption (typically less than 4 GHz). Herein, a novel concept proposed: introduction cation vacancies heterostructures into oxides can remarkably broaden bandwidth. A broadening value 7.75 GHz observed through this route, surpassing achieved other existing engineering methods, ≈100%. Crucially, study discovers that negative shift in d ‐band center, previously overlooked factor, responsible phenomenon. By inducing heterostructures, center gives rise to an increase carrier concentration promotion charge separation, resulting higher conductive polarization losses, ultimately leading broader The applicability validated another distinctly different system, where also experiences remarkable (from 0 6.86 This offers significant implications designing wide EMW absorbers expands applications various scenarios wearable electronics artificial intelligent devices.

Language: Английский

---

Preliminary exploration of elemental substituting at M, A, X, and Tx sites in MXenes: Design, Synthesis, and precise microwave absorption performance regulation

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154159 - 154159

Published: July 20, 2024

Language: Английский

---

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

---

Robust and Environmentally Friendly MXene-Based Electronic Skin Enabling the Three Essential Functions of Natural Skin: Perception, Protection, and Thermoregulation

Nano Letters, Journal Year: 2024, Volume and Issue: 24(35), P. 10883 - 10891

Published: Aug. 22, 2024

The development of electronic skin (e-skin) emulating the human skin's three essential functions (perception, protection, and thermoregulation) has great potential for human–machine interfaces intelligent robotics. However, existing studies mainly focus on perception. This study presents a novel, eco-friendly, mechanically robust e-skin replicating functions. is composed Ti3C2Tx MXene, polypyrrole, bacterial cellulose nanofibers, where MXene nanoflakes form matrix, nanofibers act as filler, polypyrrole serves conductive "cross-linker". design allows customization electrical conductivity, microarchitecture, mechanical properties, integrating sensing (perception), EMI shielding (protection), thermal management (thermoregulation). optimal can effectively sense various motions (including minuscule artery pulses), achieve an efficiency 63.32 dB at 78 μm thickness, regulate temperature up to 129 °C in 30 s 2.4 V, demonstrating its smart robotics complex scenarios.

Language: Английский

---