Physics Letters A, Journal Year: 2024, Volume and Issue: unknown, P. 130083 - 130083
Published: Nov. 1, 2024
Language: Английский
Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110680 - 110680
Published: Jan. 1, 2025
Language: Английский
Citations
5
Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)
Published: March 26, 2025
Abstract With the development of space exploration and exploitation, it is imperative to address potential threats posed objects, particularly ground-based infrared observation. However, in extreme environment, achieving camouflage across different bands with simultaneous thermal management challenging has so far slipped out concern. Here, we propose space-to-ground strategy, compatible radiative heat dissipation. Camouflage H, K, mid-wave-infrared (MWIR), long-wave-infrared (LWIR) achieved through a multilayer structure, dissipation very-long-wave-infrared (VLWIR) band. High absorptivity (0.839/0.633) H/K minimizes reflected signal solar radiation low emissivity (0.132/0.142) MWIR/LWIR suppresses signal. Additionally, high (0.798) VLWIR band ensures efficient management, resulting temperature decrement 39.8 °C metal reference simulated environment (with 1200 W m − 2 input). This work inspires sophisticated spectral manipulation environments guides techniques for objects.
Language: Английский
Citations
5
ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 2, 2025
Current limitations in implant design often lead to trade-offs between minimally invasive surgery and achieving the desired post-implantation functionality. Here, we present an artificial intelligence inverse paradigm for creating deployable implants as planar tubular thermal mechanical metamaterials (thermo-metamaterials). These thermo-metamaterial exhibit tunable properties volume change response temperature changes, enabling personalized surgery. We begin by generating a large database of corrugated thermo-metamaterials with various cell structures bending stiffnesses. An model is subsequently developed integrating evolutionary algorithm neural network. This allows automatic determination optimal microstructure performance,i.e., target stiffness. validate this approach designing patient-specific spinal fusion tracheal stents. The results demonstrate that can achieve over 200% increase or cross-sectional area their fully deployed states. Finally, propose broader vision clinically informed process prioritizes biocompatibility, feasibility, precision simultaneously development high-performing viable implants. feasibility proposed demonstrated using fuzzy analytic hierarchy customize based on relevant factors.
Language: Английский
Citations
3
Science Advances, Journal Year: 2025, Volume and Issue: 11(3)
Published: Jan. 15, 2025
A metamaterial absorber capable of swiftly altering its electromagnetic response in the microwave range offers adaptability to changing environments, such as tunable stealth capabilities. Inspired by chameleon’s ability change color through structural transformation photonic lattice crystals, which shift bandgaps reflection and transmission visible light, we designed a crisscross structure that transforms from an expanded collapsed form. This enables switch between broadband absorption peak (4 18 gigahertz). The structure, optimized data-driven design, is mechanically actuated rotation interlinked trusses. mechanism changes entire array’s response, allowing it remain undetected external radar or transmit internal signal near-field receiver when needed. mechanical actuation shifting arrayed are demonstrated.
Language: Английский
Citations
3
Nanophotonics, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 6, 2025
Abstract The increasing global temperatures have escalated the demand for indoor cooling, thus requiring energy-saving solutions. Traditional approaches often integrate metal layers in cooling windows to block near-infrared (NIR) sunlight, which, albeit effective, lack broad modulation of visible transmission and lead heat accumulation due sunlight absorption. Here, we address these limitations by developing using ZnS/MgF 2 multilayers, optimized through a binary optimization-based active learning process. We demonstrated that with total thickness below 1 µm, effectively reduced blocking NIR while achieving desired transmittance. designed multilayers exhibited transmittance ranging from 0.41 0.89 retaining decent reflectance between 0.37 0.52. These spectral characteristics remained consistent up incident angles >60°, ensuring their practical applicability vertically oriented windows. Outdoor experiments showed substantial temperature reductions 8.8 °C on floors compared uncoated glass learning-based superior performance analytical distributed Bragg reflectors equivalent thicknesses improving modulating In addition, greater number bits extensively tuned color, enabling customization aesthetic purposes. findings suggest all-dielectric can provide scalable, cost-effective alternative reducing energy consumption buildings vehicles large surfaces, supporting efforts mitigate climate change enhanced efficiency.
Language: Английский
Citations
2
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 23, 2024
Abstract Environmental heat influx often limits the effectiveness of radiative cooling materials, particularly in wearable applications where thermal comfort is paramount. This study introduces an innovative solution for personal management through phase change (RC‐PC) fiber membranes. Fabricated by coaxial electrospinning, these membranes combine a poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV) and tetraethyl orthosilicate (TEOS) composite shell, encapsulating n ‐octadecane as core material. The demonstrate exceptional optical performance, with solar reflectivity 95.0% emissivity 88.6% within atmospheric window, effectively minimizing ambient absorption. ‐octadecane‐infused fibers (0.3 mL h −1 C18@TEOS/PHBV) exhibit enthalpy 88.3 J g , reducing heating rates improving ≈1 °C at dawn. Under typical radiation (939.5 W m −2 ), provide average power 89.0 peaking 95.3 . Notably, they achieve reduction 5.1 under 550.2 maintaining temperatures significantly lower than conventional fabrics, differential 4.4 compared to medical protective clothing. These findings underscore potential RC‐PC sustainable, efficient management.
Language: Английский
Citations
5
ACS Applied Optical Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 3, 2025
Tailoring the wavelength, bandwidth, directionality, and polarization of thermal radiation is critical for various applications like infrared camouflage, radiative cooling, gas sensing. In this work, we present a deep-subwavelength bilayer structure that serves as long-wavelength (LWIR) narrow-band emitter with selectivity. The proposed LWIR basically consists tungsten oxide (WO3) polar dielectric layer upon an opaque gold (Au) ground plane. Transfer matrix method (TMM) calculations are employed to analytically investigate optical responses emitter. Leveraging Berreman mode near longitudinal (LO) phonon energy WO3, experimentally realizes high absorption (97.6%) TM-polarized state low (4.2%) TE-polarized (at incident angle 60° wavelength 10.12 μm), which shows good agreement theoretical results. Such excellent polarization-sensitive performance makes our very promising security features, information encryption, anticounterfeiting.
Language: Английский
Citations
0
Materials Today, Journal Year: 2025, Volume and Issue: unknown
Published: March 1, 2025
Language: Английский
Citations
0
Energy, Journal Year: 2025, Volume and Issue: unknown, P. 135539 - 135539
Published: March 1, 2025
Language: Английский
Citations
0
Published: March 26, 2025
Radiative cooling (RC) technologies channel excess heat into outer space or cooler environments, potentially mitigating high temperatures in the built environment. However, despite progress research, transition from laboratory breakthroughs to widespread practical deployment remains challenging. In this Review, we aim bridge gap between theoretical studies and implementations of RC technology. Developments material science system architectures have begun facilitate transformation technology innovations towards real-world applications. We analyse three representative applications with different operation temperatures: thermal management buildings (sub-ambient temperature), personal comfort (near-ambient temperature) solar-cell (above-ambient temperature). also discuss current challenges opportunities encountered advancing for commercial use, such as ensuring that are economically viable, can be produced on large enough scales meet demands desired application perform effectively a range environments weather conditions. For uptake occur, collaboration among researchers, engineers industry stakeholders is needed design sustainable scalable manufacturing processes develop standardized protocols evaluating performance materials. passive approach could reduce reliance air conditioning. This Review outlines challenges, radiative control buildings, people solar cells.
Language: Английский
Citations
0