在水/油接口处侧向推进的双金属棒
Alina Arslanova1, Ine Matthé1, Olivier Deschaume2
1Department of Chemical Engineering, KU Leuven, 3001 Leuven, Belgium. christian.clasen@kuleuven.be.
Soft matter
|August 22, 2023
概括
液体-液体接口增强了双金属Janus棒推进. 与固体边界相比,这些微游泳器在接口上实现了高达8倍的速度,提供了新的控制可能性.
科学领域:
- 合体和表面科学科学
- 活动物质物理学 活动物质物理学
- 微流体学 微流体学
背景情况:
- 监禁显著影响微游泳者动态,影响移动性和推进方向.
- 研究一直集中在固体边界上,使得液体-液体接口 (LLI) 对活性粒子推进的影响未得到充分研究.
研究的目的:
- 研究在液体-液体界面上的双金属Janus棒的吸附和运动.
- 确定LLI如何影响这些活性粒子的推进和速度.
主要方法:
- 在水性过氧化溶液和油的界面上分散双金属Janus横向推进的杆子.
- 在LLI分析粒子吸附,运动和速度分布.
主要成果:
- 双金属棒表现出速度的广泛分布,这是由于在LLI的变化湿特性.
- 观察到移动性的显著增强,一些粒子的速度高达固体墙壁附近的8倍.
- 一些粒子保持不动,表明复杂的界面相互作用.
结论:
- 液体-液体接口为调节双金属微游泳器推进提供了一个新的平台.
- 在LLIs中增强的运动性为控制复杂流体环境中的活性粒子行为提供了新的机会.
相关概念视频
03:22Colloids
17.6K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.6K
01:17Steady, Laminar Flow Between Parallel Plates
236
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
236
01:13Contact Angle
12.4K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
12.4K
01:04Hydrostatic Pressure Force on a Curved Surface
1.9K
Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
1.9K
01:23Design Example: Deciding Thickness of Lubricating Fluid in a Shaft
131
Effective lubrication between a rotating shaft and its bearing housing is essential in rotating machinery to minimize friction, wear, and energy loss. With carefully controlled thickness and viscosity, the lubricant layer prevents metal-to-metal contact, ensuring smooth operation.
To calculate the required thickness of the lubricant layer, the tangential velocity at the shaft's surface must first be determined. This velocity is calculated by converting the rotational speed to angular...
To calculate the required thickness of the lubricant layer, the tangential velocity at the shaft's surface must first be determined. This velocity is calculated by converting the rotational speed to angular...
131