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Artificial helical microswimmers with mastigoneme-inspired appendages
Soichiro Tottori1, Bradley J Nelson1
1Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich CH-8092, Switzerland.
Biomicrofluidics
|January 8, 2014
Summary
Artificial microswimmers with mastigonemes, inspired by nature, can reverse their swimming direction. Researchers controlled speed and direction by adjusting mastigoneme dimensions.
Area of Science:
- Biomimetic engineering
- Microfluidics
- Robotics
Background:
- Natural flagella use wave propagation for movement; smooth flagella move against wave direction.
- Mastigonemes, appendages on natural flagella, enable movement with wave propagation.
- Artificial microswimmers offer potential for targeted delivery and sensing applications.
Purpose of the Study:
- To design and fabricate magnetically actuated artificial helical microswimmers inspired by natural mastigonemes.
- To investigate the effect of mastigonemes on microswimmer propulsion and swimming direction.
- To demonstrate control over microswimmer speed and direction via mastigoneme geometry.
Main Methods:
- Fabrication of artificial helical microswimmers with integrated flagella and mastigonemes using 3D lithography.
- Deposition of ferromagnetic thin films via electron beam evaporation for magnetic actuation.
- Experimental analysis of microswimmer behavior under varying magnetic fields and mastigoneme configurations.
Main Results:
- Successfully created artificial microswimmers mimicking natural mastigoneme structures.
- Demonstrated reversal of swimming direction compared to smooth artificial flagella.
- Showcased that mastigoneme length/spacing ratio significantly influences swimming speed and directionality.
Conclusions:
- Mastigoneme-equipped artificial microswimmers can achieve propulsion in the direction of flagellar wave propagation.
- The geometric design of mastigonemes provides a tunable mechanism for controlling microswimmer locomotion.
- This research offers a novel approach for developing advanced micro-robotic systems with enhanced maneuverability.
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