凝结液滴在纳米结构超疏水表面上漫游
Cheuk Wing Edmond Lam1,2, Kartik Regulagadda1,3, Matteo Donati1
1Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland.
Nature communications
|January 30, 2025
概括
超疏水表面的凝结微滴表现出一种新的"漫游"运动,由粘附不对称性驱动. 这种现象比滴滴跳跃更有效地增强热传递,提高了能源和水应用的冷凝效率.
科学领域:
- 表面科学是一门科学.
- 阶段变化现象:相变现象
- 纳米技术纳米技术
背景情况:
- 凝结对于能源和水的收集至关重要.
- 在超疏水表面上跳跃的滴滴增强了热传递.
- 引力驱动的滴水去除是一种经过充分研究的机制.
研究的目的:
- 为了研究缩微滴在纳米结构的超水表面上漫游的物理.
- 为了解释自发的,独立于重力的滴滴运动背后的驱动力.
- 为了比较漫游的热传输效率与滴滴跳跃.
主要方法:
- 在纳米结构超水表面上观察微滴的行为.
- 粘附不对称性和触动动量产生量的量化.
- 对和凝聚力学动态的分析.
- 测量传热效率. 测量传热效率.
主要成果:
- 凝聚的微滴表现出全方位的"漫游"运动.
- 来自随机核聚变的固有粘附不对称性驱动滴滴动量.
- 漫游增强了表面的更新,并防止了凝结物泛滥.
- 与滴滴跳跃相比,漫游显示出更高的传热效率.
结论:
- 微滴流浪是一种新的,高效的冷凝物去除机制.
- 表面纳米结构诱导的粘附不对称性是启动漫游的关键.
- 漫游在冷凝应用的热传输增强方面提供了显著的优势.
相关概念视频
Colloidal precipitates
494
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
494
Surface Tension of Fluid
216
Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies...
Surface tension varies...
216
Surface Tension, Capillary Action, and Viscosity
27.4K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
27.4K
Cohesion
51.4K
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
On a...
51.4K


