Tuesday, January 3, 2012

Magnetic Helical Micromachines: Fabrication, Controlled Swimming, and Cargo Transport



  1. Soichiro Tottori1,2
  2. Li Zhang1,*
  3. Famin Qiu1,
  4. Krzysztof K. Krawczyk3
  5. Alfredo Franco-Obregón3
  6. Bradley J. Nelson1
Article first published online: 2 JAN 2012



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.

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