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Bacteria-inspired nanorobots with flagellar polymorphic transformations and bundling.

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Area of Science:

  • Nanotechnology
  • Biomedical Engineering
  • Robotics

Background:

  • Micro- and nanoscale swimmers often mimic bacterial flagella for propulsion using inorganic materials or photoactive polymers.
  • Existing artificial nanohelices lack the ability to reconfigure geometry in response to multiple environmental stimuli, limiting motility in complex biological settings.

Purpose of the Study:

  • To report magnetic actuation of self-assembled bacterial flagellar nanorobotic swimmers.
  • To investigate the influence of flagellar form reconfiguration on propulsion.
  • To demonstrate steering and flagellar bundling capabilities of these nanorobots.

Main Methods:

  • Experimental and numerical characterization of nanorobotic swimmers with three distinct flagellar forms.
  • Magnetic actuation for controlling nanorobot movement and geometry.
  • Study of flagellar bundling in multi-flagellated nanoswimmers.

Main Results:

  • Demonstrated magnetic actuation of self-assembled bacterial flagellar nanorobots.
  • Observed changes in propulsion efficiency correlated with flagellar form reconfiguration.
  • Successfully demonstrated steering capabilities and induced flagellar bundling.

Conclusions:

  • Self-assembled bacterial flagellar nanorobots can be magnetically actuated and reconfigure their helical geometry.
  • Dynamic shape changes enhance nanorobot motility, particularly in challenging biological environments.
  • These findings pave the way for advanced wirelessly controlled nanorobots for in vitro and in vivo biomedical applications.