Fast-Developing Dynamic Radiative Thermal Management: Full-Scale Fundamentals, Switching Methods, Applications, and Challenges

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

Published: Feb. 17, 2025

Abstract Rapid population growth in recent decades has intensified both the global energy crisis and challenges posed by climate change, including warming. Currently, increased frequency of extreme weather events large fluctuations ambient temperature disrupt thermal comfort negatively impact health, driving a growing dependence on cooling heating sources. Consequently, efficient management become central focus research. Traditional systems consume substantial energy, further contributing to greenhouse gas emissions. In contrast, emergent radiant technologies that rely renewable have been proposed as sustainable alternatives. However, achieving year-round without additional input remains formidable challenge. Recently, dynamic radiative emerged most promising solution, offering potential for energy-efficient adaptation across seasonal variations. This review systematically presents advancements management, covering fundamental principles, switching mechanisms, primary materials, application areas. Additionally, key hindering broader adoption are discussed. By highlighting their transformative potential, this provides insights into design industrial scalability these innovations, with ultimate aim promoting integration applications.

Language: Английский

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Dual-functional tunable emitter with high visual transparency for energy saving and information encryption

Applied Materials Today, Journal Year: 2024, Volume and Issue: 39, P. 102297 - 102297

Published: June 26, 2024

Language: Английский

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Femtosecond laser fabrication metasurface emitter for multispectral camouflage

Optics Letters, Journal Year: 2025, Volume and Issue: 50(9), P. 2792 - 2792

Published: March 24, 2025

The powerful electromagnetic capability of a metasurface makes it good candidate for thermal emission manipulation toward promising infrared (IR) camouflage and management technology. Here, metasurface-based is fabricated to achieve multispectral as well radiative cooling simultaneously. Cross-scale processing on metal-dielectric composite films successfully achieved by femtosecond laser direct writing (FsLDW), which proven be an efficient feasible technique in fabrication. prepared emitter exhibits low emissivity (ɛ3-5 μm = 0.32, ɛ8-14 0.31) atmospheric windows but high absorption 10.6 so that can effectively evade the tracking detectors radars. Besides, also has undetected band (ɛ5-8 0.66) dissipate possible heat accumulation. proposed design fabrication method empowers new ideas generation optical devices compatibility.

Language: Английский

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Electrically Controlled Metal‐Insulator Heterogeneous Evolution for Infrared Switch and Perfect Absorption

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

Abstract Active switching, which enables multifunctionality within a single optical component, is essential for reconfigurable infrared photonic systems such as radiation engineering, sensing, and communication. Metamaterials offer solution but involve complex design fabrication. A simpler approach with planar layered structure becomes promising offering economical manufacturing, easier integration, scalability. However, it requires an active medium giant tunability effective modulation mechanisms. Here, electrically controlled reversible switching demonstrated via layer of perovskite nickelate on opaque substrate. Driven by the evolution refractive index during triggered proton‐mediated metal‐to‐insulator transition, device transforms from high reflective ( R ≈0.74) to low state ≈0.09) at λ = 7–10 µm. temperature‐independent perfect absorption > 0.99 11.6–12.1 µm) emerges in partially hydrogenated mixture metal insulator phases, results emissivity ≈0.623 7–14 The behavior tunable over wide temperature wavelength range, versatile path adaptive applications.

Language: Английский

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Optical transparent metamaterial emitter with multiband compatible camouflage based on femtosecond laser processing

Nanophotonics, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Infrared (IR) camouflage has garnered growing attention with progress in IR detection technology. The emergence of metamaterial powerful electromagnetic field regulation ability provides an effective solution for thermal emission manipulation camouflage. However, the intricated micro/nano machining technology greatly limits its moving toward practical application, and single-band makes it difficult to resist multiband cooperative systems. Here, a flexible, fine, mask-free femtosecond laser direct writing (FsLDW) was introduced pattern on ultra-thin metals. Based this efficient technique, optically transparent emitter compatible is fabricated. demonstrated achieve high reflectance (R 3-5 µm = 0.79 R 8-14 0.70) dual-band atmospheric window low 1.06 0.3, 1.55 0.1) stealth. In addition, emissivity (ɛ 5-8 0.64) nonatmospheric effectively dissipates accumulated heat, showing promising prospects radiative cooling by comparison Ag at same heating power. This work offers clue coordinated control waves heat through simple structural design, which expected promote applications management military.

Language: Английский

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Multimodal Visible-Infrared Subwavelength Structures with Decoupled Modulation of Reflection Spectra

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

Published: April 24, 2025

Visible-infrared reflectivity carries an important part of identity information for most kinds objects, and its decoupled modulation holds significant application value in the field reconstruction, such as display, camouflage, anticounterfeiting. Some well-designed materials or devices have exhibited remarkable abilities optical reflectivity, but it is difficult to concisely describe their performance involved controllable characteristics are at least two. Here, a systematic evaluation strategy that comprehensively assesses both decoupling degree changing range through single quantitative indicator first proposed, set subwavelength structures presented complex four visible-infrared characteristics. The ability evaluated utilizing new strategy, where magnitudes indicators align with flexibility, thus verifying validity proposed approach. possesses robustness can be fabricated by electrochemical process. Based on obtained structures, multiple display successfully implemented.

Language: Английский

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Temperature-adaptive radiative modulator for multi-domain safety applications

Device, Journal Year: 2024, Volume and Issue: 2(8), P. 100407 - 100407

Published: Aug. 1, 2024

Language: Английский

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Realizing Sunlight‐Induced Efficiently Dynamic Infrared Emissivity Modulation Based on Aluminum‐Doped zinc Oxide Nanocrystals

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

Published: July 29, 2024

Dynamic manipulation of an object's infrared radiation characteristics is a burgeoning technology with significant implications for energy and information fields. However, exploring efficient stimulus-spectral response mechanism realizing simple device structures remains formidable challenge. Here, novel dynamic emissivity regulation proposed by controlling the localized surface plasmon resonance absorption aluminum-doped zinc oxide (AZO) nanocrystals through ultraviolet photocharging/oxidative discharging. A straightforward architecture that integrates AZO nanocrystal film reflective layer substrate, functioning as photo-induced modulator, which can be triggered weak light in sunlight, engineered. The modulator exhibits amount 0.72 0.61 3-5 8-13 µm ranges, respectively. Furthermore, demonstrates triggering characteristic, broad spectral range, angular-independent emissivity, long cyclic lifespan. allows self-adaptive daytime radiative cooling nighttime heating depending on sunlight O

Language: Английский

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Enhancing Infrared Stealth Performance of Polyacrylonitrile-Aluminum-Doped Zinc Oxide Films by Incorporation Of Carbon Material

Published: Jan. 1, 2024

Development of infrared stealth materials with high performance and stability as well low cost is challenging significant due to their extensive application in various fields like military, aviation, aerospace, energy. In this study non-solvent induced phase separation technique was employed fabricate flexible, foldable, robust composite films possessing porosity specific surface areas from polyacrylonitrile (PAN), aluminum-doped zinc oxide (AZO), multi-walled carbon nanotubes (MWCNTs) modified poly(sodium 4-styrenesulfonate) (PSS). The prepared PAN-AZO film containing 15 wt% AZO exhibited an exceptional emissivity 0.28 good thermal camouflage property. Incorporation MWCNTs (PSS@MWCNTs) into the matrix yielded PAN-AZO/PSS@MWCNTs enhanced performance. fabricated 2 PSS@MWCNTs displayed lowest 0.16 8–14 μm waveband excellent discovery provides enlightenment for design preparation promising both civil military stealth.

Language: Английский

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Multi-band compatible camouflage enabled by phase transition modulation of flexible GST films

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156128 - 156128

Published: Sept. 1, 2024

Language: Английский

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