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Keywords:

  • swimming microrobots;
  • direct laser writing;
  • cytotoxicity;
  • rotating magnetic field;
  • micromanipulation
Thumbnail image of graphical abstract

A simple and general fabrication method for helical swimming micromachines by direct laser writing and e-beam evaporation is demonstrated. The magnetic helical devices exhibit varying magnetic shape anisotropy, yet always generate corkscrew motion using a rotating magnetic field. They also exhibit good swimming performance and are capable of pick-and-place micromanipulation in 3D. Cytotoxicity of the devices was investigated using mouse myoblasts.