Liu Fan, Zhang Qichong
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, People's Republic of China.
Nanomicro Lett. 2025 Mar 10;17(1):178. doi: 10.1007/s40820-025-01698-0.
During the daytime, conventional radiative coolers disregard the directionality of thermal radiation, thereby overlooking the upward radiation from the ground. This upward radiation enhances the outward thermal radiation, leading to a substantial reduction in the subambient daytime radiative cooling performance. Conversely, radiative coolers featuring angular asymmetry and spectral selectivity effectively resolve the problem of thermal radiation directionality, successfully evading the interference caused by the ground-generated thermal radiation. This cooler overcomes the limitations posed by the angle of incident light, making it suitable for subambient daytime radiative cooling of vertical surfaces. Furthermore, by adjusting the structure of the cooler, the angular range of thermal radiation can be modulated, enabling the application of radiative cooling technology for intelligent temperature regulation of various inclined surfaces encountered in daily life. This innovative work makes a significant contribution to the development of subambient smart thermal interaction systems and opens up new possibilities for the practical application of radiative cooling technology.
在白天，传统的辐射冷却器忽略了热辐射的方向性，从而忽视了来自地面的向上辐射。这种向上辐射增强了向外的热辐射，导致亚环境白天辐射冷却性能大幅降低。相反，具有角度不对称和光谱选择性的辐射冷却器有效地解决了热辐射方向性问题，成功规避了地面产生的热辐射造成的干扰。这种冷却器克服了入射光角度带来的限制，适用于垂直表面的亚环境白天辐射冷却。此外，通过调整冷却器的结构，可以调节热辐射的角度范围，使辐射冷却技术能够应用于日常生活中遇到的各种倾斜表面的智能温度调节。这项创新性工作对亚环境智能热交互系统的发展做出了重大贡献，并为辐射冷却技术的实际应用开辟了新的可能性。
