Adaptive cooling strategy via human hair: High optothermal conversion efficiency of solar radiation into thermal dissipation

• 成果类型: Article
• 署名作者: Pal, Sudip Kumar; Jeong, Soohyun; Otoufat, Tohid; Bae, Hoyeon; Kim, Gunwoo
• 署名单位: Korea Institute of Industrial Technology (KITECH)
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-13086
• DOI: 10.1073/pnas.2312297121
• 发表日期: 2024-01-23
• 关键词: composites; DESIGN

摘要

Natural species have developed complex nanostructures in a hierarchical pattern to control the absorption, reflection, or transmission of desired solar and infrared wavelengths. This bio- inspired structure is a promising method to manipulating solar energy and thermal management. In particular, human hair is used in this article to highlight the optothermal properties of bio- inspired structures. This study investigated how melanin, an effective solar absorber, and the structural morphology of aligned domains of keratin polymer chains, leading to a significant increase in solar path length, which effectively scatter and absorb solar radiation across the hair structure, as well as enhance thermal ramifications from solar absorption by fitting its radiative wavelength to atmospheric transmittance for high - yield radiative cooling with realistic human body thermal emission.