在超水表面上轨道电湿对电流滴的运动特征
Chao Lv1, Tong Zhou1, Yang Liu1
1Key Laboratory of Vibration and Control of Aero-Power Equipment, Ministry of Education, Shenyang 110819, China.
Langmuir : the ACS journal of surfaces and colloids
|March 26, 2025
概括
轨道电湿对电流 (EWOD) 在超疏水表面提供高速的抗重力滴滴操纵. 这项研究模拟了各种电极轨道上的单滴运动,揭示了关键的运动特征和力.
科学领域:
- 表面科学是一门学科.
- 流体动力学 流体动力学
- 微流体学 微流体学
背景情况:
- 传统的电湿对电流 (EWOD) 研究往往忽视了单滴动力学.
- 在超疏水表面上运行的轨道EWOD具有诸如高速和抗重力滴滴操纵等优势.
- 了解异常滴滴行为对于设计先进的功能电路至关重要.
研究的目的:
- 在轨道EWOD下研究单滴的运动特征和移动方式.
- 分析局部能量的影响在异常运动期间滴滴的行为.
- 为设计具有增强功能的混合电路提供见解.
主要方法:
- 引入基于现有的EWOD模型和超水表面实验的EW力校正因子.
- 使用COMSOL多物理模型模拟相场模拟以模拟滴滴运动.
- 在直线,倾斜和圆弧轨道上模拟10μL滴滴,使用250V (1000Hz) 的异常共平面电极.
主要成果:
- 总结了液滴运动特征和在不同的轨道路径上的移动模式.
- 在直轨轨道上观察到的扩散半径大约是初始半径的1.09倍.
- 记录了9.8°的最大滴滴倾斜角和在297μm偏移时的最大校正力~24.7μN.
结论:
- 这项研究阐明了轨道EWOD中的单滴动态,有助于更深入地了解滴水表面相互作用.
- 模拟结果提供了关于在特定的电气和几何条件下的滴水行为有价值的数据.
- 这些发现支持设计使用轨道EWOD原理的新型微流体设备和功能混合电路.
相关概念视频
01:22Surface Tension of Fluid
199
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...
199
02:57Surface Tension, Capillary Action, and Viscosity
27.3K
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...
27.3K
01:16Surface Tension and Surface Energy
1.3K
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
1.3K