Energy and Buildings, Journal Year: 2024, Volume and Issue: unknown, P. 114949 - 114949
Published: Oct. 1, 2024
Language: Английский
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 Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 16, 2024
Abstract Radiative cooling is achieved by controlling surface optical behavior toward solar and thermal radiation, offering promising solutions for mitigating global warming, promoting energy saving, enhancing environmental protection. Despite significant efforts to develop surfaces in various forms, five primary challenges remain practical applications: efficiency, maintaining appearance, managing overcooling, improving durability, enabling scalable manufacturing. However, a comprehensive review bridging these gaps currently lacking. This work begins introducing the fundamentals of radiative its potential applications. It then explores discusses advanced through structural design, material selection, fabrication processes. aims provide guidance future research industrial development technology.
Language: Английский
Citations
9
Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Passive daytime radiative cooling (PDRC) presents an effective strategy for mitigating the global greenhouse effect.
Language: Английский
Citations
0
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162083 - 162083
Published: March 1, 2025
Language: Английский
Citations
0
Advanced Fiber Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 11, 2025
Language: Английский
Citations
0
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: April 22, 2025
Self-adaptive thermal management over large areas is highly attractive since single-mode radiative cooling materials lead to undesired overcooling. However, it remains a challenge that dual-mode switchable require artificial stimuli or additional energy for switching between heating and modes. Here, different from driven by energy, we propose an autonomously self-adaptive dual-modal coating with assembled micro-heterostructures can engender the multistage scattering of incident light. The resultant demonstrates 92% solar reflectivity 93% emissivity in hot condition. More significantly, reaches 60% visible light optical modulation, which attributed formation disruption conjugation region chromogenic molecules, prevent overcooling cold A thermal-switchable fabric further fabricated via large-area spraying processes, demonstrating 2.5 °C warmer condition 8.7 cooler compared white samples. highlights importance large-scale manufacturing temperature-adaptive materials, providing insights into application dynamic garment, camping, building other fields.
Language: Английский
Citations
0
Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)
Published: April 27, 2025
Abstract The advancement of sophisticated smart windows exhibiting superior thermoregulation capabilities in both solar spectrum and long-wave infrared range maintains a prominent objective for researchers this field. In study, Janus window is proposed prepared based on polymer-stabilized liquid–crystal films/thermochromic materials. It can achieve switchable front emissivity ( ε Front ) modulation ability (Δ T sol through dynamic flipping, making it suitable different seasonal energy-saving requirements. Outdoor experiments show that under daytime illumination, the indoor temperature decreases by 8 °C, nighttime drops 5 °C. MATLAB simulation calculations indicate cooling power 93 W m −2 , while reaches 142 . Interestingly, modifying conductive layer, effectively shield electromagnetic radiation (within X-band frequency (8.2–12.4) GHz). Energy reveals substantial superiority device energy savings compared with single-layer liquid crystal, poly(N-isopropyl acrylamide), normal glass when applied climate zones. This research presents compelling opportunity development characterized exceptional capabilities.
Language: Английский
Citations
0
Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 111076 - 111076
Published: April 1, 2025
Language: Английский
Citations
0
Renewable Energy, Journal Year: 2025, Volume and Issue: unknown, P. 123315 - 123315
Published: April 1, 2025
Language: Английский
Citations
0
ACS Nano, Journal Year: 2025, Volume and Issue: unknown
Published: May 15, 2025
Passive radiative cooling holds promise for achieving subambient without consuming energy, facilitated by emitting thermal radiation into cosmic space. However, previous approaches, focusing heavily on aligning structural scales with optical properties, have struggled effective anticondensation, thus limiting their applicability in high-humidity or supercooled conditions. Here, we demonstrate a design that enables efficient passive while maintaining robust anticondensation performance, underpinned triple-scale structure comprising microscale polymer particles, submicrometer-scale interparticle gaps, and nanoscale pores the particle surfaces. This achieves an sunlight reflectance of 0.98 high mid-infrared emissivity 0.91 driven structure-enhanced Mie scattering chemical bond vibrations materials, respectively, enabling 10.9 °C under direct at ∼40% relative humidity. Notably, even humidity ∼70%, our still manifests average ∼4 compared to ambient temperature, quite exceeding traditional materials. is attributed performance characterized maximum droplet shedding radius ∼47.6 μm condensation coverage ∼32.4%, structure-induced larger Laplace pressure force smaller adhesion. Moreover, demonstrates durability, encompassing self-cleaning via condensing droplets, stability below 500 °C, antiultraviolet above 100 h, which exhibits potential applications management various extreme scenarios.
Language: Английский
Citations
0