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Biologically inspired flexible photonic films for efficient passive radiative cooling

Zhang, Haiwen (författare)
Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.,State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China
Ly, Kally C. S. (författare)
Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.,State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China
Liu, Xianghui (författare)
Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.,State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China
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Chen, Zhihan (författare)
Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.;Univ Texas Austin, Texas Mat Inst, Mat Sci & Engn Program, Walker Dept Mech Engn, Austin, TX 78712 USA.,State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China;;Walker Department of Mechanical Engineering, Materials Science & Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, USA
Yan, Max (författare)
KTH,Fotonik,Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, 16440 Kista, Sweden
Wu, Zilong (författare)
Univ Texas Austin, Texas Mat Inst, Mat Sci & Engn Program, Walker Dept Mech Engn, Austin, TX 78712 USA.,Walker Department of Mechanical Engineering, Materials Science & Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, USA
Wang, Xin (författare)
Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.,State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China
Zheng, Yuebing (författare)
Univ Texas Austin, Texas Mat Inst, Mat Sci & Engn Program, Walker Dept Mech Engn, Austin, TX 78712 USA.,Walker Department of Mechanical Engineering, Materials Science & Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, USA
Zhou, Han (författare)
Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.,State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China
Fan, Tongxiang (författare)
Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China.,State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China
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Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China (creator_code:org_t)
2020-06-15
2020
Engelska.
Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424 .- 1091-6490. ; 117:26, s. 14657-14666
Relaterad länk:
https://www.pnas.org...
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https://doi.org/10.1...
https://urn.kb.se/re...
https://doi.org/10.1...
https://urn.kb.se/re...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • Temperature is a fundamental parameter for all forms of lives. Natural evolution has resulted in organisms which have excellent thermoregulation capabilities in extreme climates. Bioinspired materials that mimic biological solution for thermoregulation have proven promising for passive radiative cooling. However, scalable production of artificial photonic radiators with complex structures, outstanding properties, high throughput, and low cost is still challenging. Herein, we design and demonstrate biologically inspired photonic materials for passive radiative cooling, after discovery of longicorn beetles' excellent thermoregulatory function with their dual-scale fluffs. The natural fluffs exhibit a finely structured triangular cross-section with two thermoregulatory effects which effectively reflects sunlight and emits thermal radiation, thereby decreasing the beetles' body temperature. Inspired by the finding, a photonic film consisting of a micropyramid-arrayed polymer matrix with random ceramic particles is fabricated with high throughput. The film reflects similar to 95% of solar irradiance and exhibits an infrared emissivity >0.96. The effective cooling power is found to be similar to 90.8 W center dot m(-2) and a temperature decrease of up to 5.1 degrees C is recorded under direct sunlight. Additionally, the film exhibits hydrophobicity, superior flexibility, and strong mechanical strength, which is promising for thermal management in various electronic devices and wearable products. Our work paves the way for designing and fabrication of high-performance thermal regulation materials.

Ämnesord

NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Composite Science and Engineering (hsv//eng)

Nyckelord

bioinspired materials
flexible photonic film
passive radiative cooling
thermoregulation

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