辐射冷却
超材料
电子设备和系统的热管理
材料科学
辐射传输
辐射热
光电子学
环境科学
纳米技术
工程物理
物理
光学
复合材料
气象学
机械工程
工程类
作者
Gan Huang,Ashok R. Yengannagari,Kishin Matsumori,P. K. Patel,Anurag Datla,Karina Trindade,Enkhlen Amarsanaa,Tonghan Zhao,Uwe Köhler,Dmitry Busko,Bryce S. Richards
标识
DOI:10.1038/s41467-024-48150-2
摘要
Abstract Transparent roofs and walls offer a compelling solution for harnessing natural light. However, traditional glass roofs and walls face challenges such as glare, privacy concerns, and overheating issues. In this study, we present a polymer-based micro-photonic multi-functional metamaterial. The metamaterial diffuses 73% of incident sunlight, creating a more comfortable and private indoor environment. The visible spectral transmittance of the metamaterial (95%) surpasses that of traditional glass (91%). Furthermore, the metamaterial is estimated to enhance photosynthesis efficiency by ~9% compared to glass roofs. With a high emissivity (~0.98) close to that of a mid-infrared black body, the metamaterial is estimated to have a cooling capacity of ~97 W/m 2 at ambient temperature. The metamaterial was about 6 °C cooler than the ambient temperature in humid Karlsruhe. The metamaterial exhibits superhydrophobic performance with a contact angle of 152°, significantly higher than that of glass (26°), thus potentially having excellent self-cleaning properties.
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