Effect of Cilia Orientation in Metachronal Transport of Microparticles

• 作者: Alexander Rockenbach Christoph Brücker Uwe Schnakenberg Vladimir Mikulich
• 来源期刊: 力学国际期刊(英文)
• 学科: 医学
• 关键词: CILIA TRANSPORT Metachronal WAVE Fluidic TRANSPORT Micro-Particles
• 年，卷（期）: lxgjqkyw_2017,（1）
• 页码范围: 1-10
• 页数: 10页
• 分类号: R73

摘要

A biomimetic approach is used to generate a directed transversal transportation of micron-sized particles in liquids based on the principle of cilia-type arrays in coordinated motion. Rows of flaps mimicking planar cilia are positioned off-centre along an array of cavities covered with membranes that support the flaps. These membranes are deflected from a concave to a convex shape and vice versa by pneumatic actuation applying positive and negative pressures (relative to the ambient) inside the cavities. As a result, the flap on top of the membrane tilts to the left or right within such a pressure cycle, performing a beat stroke. Since each cavity can be addressed in the device individually and in rapid succession, waves of coordinated flap motion can be run along the wall. Such metachronal waves are generated and transport of particles along the cilia surface is achieved in both symplectic and antiplectic direction. It is shown that the initial tilt of the flaps relative to the wall-normal determines the direction of transport.