云启发的白色和灰色等离子体元表面用于伪装的热管理
Mhd Adel Assad1, Moheb Abdelaziz1,2, Torge Hartig2
1Nanochemistry and Nanoengineering, School of Chemical Engineering, Department of Chemistry and Materials Science, Aalto University, Espoo, Finland.
Advanced materials (Deerfield Beach, Fla.)
|June 6, 2025
概括
新的超表面为先进的热管理创建白色和灰色等离子体颜色. 这些材料模仿云冷却或增强光吸收隐形和伪装应用.
科学领域:
- 材料科学 材料科学 材料科学
- 光学是什么?光学是什么?光学是什么?
- 纳米技术纳米技术
背景情况:
- 大自然利用色彩驱动的热调节.
- 云-气溶相互作用影响大气辐射效应.
- 超表面提供可调节的光学特性.
研究的目的:
- 为白色和灰色等离子体颜色设计无序的元表面.
- 探索用于隐形和伪装的光和热管理中的应用.
- 研究与传统被动冷却不同的地方热管理.
主要方法:
- 无序的元表面的设计.
- 利用等离子体效应来生成颜色.
- 通过喷进行全室纳米制造.
主要成果:
- 白色超表面通过反向散射实现类似云的冷却 (-10°C).
- 与黑色吸光器相比,灰色的超表面增强了光捕获 (+10°C).
- 证明了低排放性质和可见外观.
结论:
- 使用元表面进行局部热管理的新方法.
- 潜在的先进的伪装,隐形和热能解决方案.
- 可扩展,可持续的制造,具有长期稳定性.
相关概念视频
01:19Mechanism of heat transfer
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
01:20Mechanisms of Heat Transfer II
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...