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Updated: Aug 15, 2025

Preparation and 3D Tracking of Catalytic Swimming Devices
Published on: July 1, 2016
Gauging Nanoswimmer Dynamics via the Motion of Large Bodies
Ashwani Kr Tripathi1, Tsvi Tlusty1,2,3
1Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea.
Abstract:
Nanoswimmers are ubiquitous in biotechnology and nanotechnology but are extremely challenging to measure due to their minute size and driving forces. A simple method is proposed for detecting the elusive physical features of nanoswimmers by observing how they affect the motion of much larger, easily traceable particles. Modeling the swimmers as hydrodynamic force dipoles, we find direct, easy-to-calibrate relations between the observable power spectrum and diffusivity of the tracers and the dynamic characteristics of the swimmers-their force dipole moment and correlation times.
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