Wang Qianqian, Yang Lidong, Yu Jiangfan, Zhang Li
Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
Chow Yuk Ho Technology Centre for Innovative Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
Robotics Biomim. 2017;4(1):20. doi: 10.1186/s40638-017-0076-0. Epub 2017 Nov 16.
Particle-based magnetically actuated microswimmers have the potential to act as microrobotic tools for biomedical applications. In this paper, we report the dynamic behaviors of a three-particle paramagnetic microswimmer. Actuated by a rotating magnetic field with different frequencies, the microswimmer exhibits simple rotation and propulsion. When the input frequency is below 8 Hz, it exhibits simple rotation on the substrate, whereas it shows propulsion with varied poses when subjected to a frequency between 8 and 15 Hz. Furthermore, a solid surface that enhances swimming velocity was observed as the microswimmer is actuated near a solid surface. Our simulation results testify that the surface-enhanced swimming near a solid surface is because of the induced pressure difference in the surrounding fluid of the microagent.
基于粒子的磁驱动微型游泳器有潜力成为用于生物医学应用的微型机器人工具。在本文中，我们报告了一种三粒子顺磁微型游泳器的动态行为。由不同频率的旋转磁场驱动，该微型游泳器表现出简单的旋转和推进。当输入频率低于8赫兹时，它在基底上表现出简单的旋转，而当受到8至15赫兹的频率作用时，它会以不同姿态进行推进。此外，当微型游泳器在固体表面附近被驱动时，观察到一个能提高游泳速度的固体表面。我们的模拟结果证明，在固体表面附近表面增强的游泳是由于微型体周围流体中感应的压力差。
