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Updated: Jul 17, 2025
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An Additive Manufacturing Technique for the Facile and Rapid Fabrication of Hydrogel-based Micromachines with Magnetically Responsive Components
Published on: July 18, 2018
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Elastohydrodynamic propulsion of a filament magnetically driven at both ends
Ali Gürbüz1, Ke Qin1, Jake J Abbott2
1Department of Mechanical Engineering, Santa Clara University, Santa Clara, CA 95053, USA. opak@scu.edu.
Soft Matter
|September 8, 2023
Summary
Researchers explored new ways to propel microswimmers using magnetic forces at both ends of an elastic filament. This dual-actuation method enables novel backward propulsion modes and enhanced performance for soft microrobots.
Area of Science:
- Soft robotics
- Fluid dynamics
- Biomimetic propulsion
Background:
- Microswimmers are typically elastic filaments actuated magnetically at one end.
- Their propulsion behavior is well-understood in single-end actuation setups.
Purpose of the Study:
- To investigate the propulsion characteristics of elastic filaments actuated by magnetic torques at both ends.
- To explore new propulsion modes and their underlying physical mechanisms.
Main Methods:
- Utilized elastohydrodynamic interactions between an elastic filament and surrounding fluid.
- Applied magnetic torques at both ends of the filament.
- Analyzed propulsion behavior across different physical regimes.
Main Results:
- Observed emergence of new propulsion behaviors, including a backward propulsion mode.
- Demonstrated that propulsion direction (forward/backward) depends on filament stiffness.
- Achieved propulsion magnitudes unattainable with single-end actuation.
Conclusions:
- Dual-end magnetic actuation of elastic filaments reveals novel propulsion modes.
- Filament stiffness critically influences propulsion direction and magnitude.
- Findings can guide development of advanced soft microrobots for biomedical applications.
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