Related Experiment Video
Updated: Feb 17, 2026

Preparation and 3D Tracking of Catalytic Swimming Devices
Published on: July 1, 2016
Characterizing dynamic behaviors of three-particle paramagnetic microswimmer near a solid surface
Qianqian Wang1, Lidong Yang1, Jiangfan Yu1
1Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
Abstract:
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.
Related Concept Videos
Motion Of A Charged Particle In A Magnetic Field
Paramagnetism
Magnetic Field due to Moving Charges
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
First Law: Particles in Two-dimensional Equilibrium
Newton's first law tells us about...
Atomic Nuclei: Nuclear Relaxation Processes
First Law: Particles in One-dimensional Equilibrium

