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Journal of Micro-Bio Robotics

, Volume 9, Issue 3–4, pp 79–86 | Cite as

Biocompatible, accurate, and fully autonomous: a sperm-driven micro-bio-robot

  • Islam S. M. KhalilEmail author
  • Veronika Magdanz
  • Samuel Sanchez
  • Oliver G. Schmidt
  • Sarthak Misra
Research Paper

Abstract

We study the magnetic-based motion control of a sperm-flagella driven Micro-Bio-Robot (MBR), and demonstrate precise point-to-point closed-loop motion control under the influence of the controlled magnetic field lines. This MBR consists of a bovine spermatozoon that is captured inside Ti/Fe nanomembranes. The nanomembranes are rolled-up into a 50 μm long microtube with a diameter of 5-8 μm. Our MBR is self-propelled by the sperm cell and guided using the magnetic torque exerted on the magnetic dipole of its rolled-up microtube. The self-propulsion force provided by the sperm cell allows the MBR to move at an average velocity of 25 ±10 μm/s towards a reference position, whereas the magnetic dipole moment and the controlled weak magnetic fields (approximately 1.39 mT) allow for the localization of the MBR within the vicinity of reference positions with an average region-of-convergence of 90 ±40μm. In addition, we experimentally demonstrate the guided motion of the MBR towards a magnetic microparticle with applications towards targeted drug delivery and microactuation.

Keywords

Micro-bio-robot Magnetic guidance Sperm cells Closed-loop Motion control Self-propulsion 

Notes

Acknowledgments

The authors acknowledge the funding from MIRA-Institute for Biomedical Technology and Technical Medicine, University of Twente. The research leading to these results has also received funding from the Volkswagen Foundation (# 86 362) and the European Research Council under the European Unions Seventh Framework Programme (FP7/2007-2013)/ERC Grant agreement No. 311529.

Supplementary material

(WMV 7.54 MB)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Islam S. M. Khalil
    • 1
    Email author
  • Veronika Magdanz
    • 2
  • Samuel Sanchez
    • 4
  • Oliver G. Schmidt
    • 2
    • 3
  • Sarthak Misra
    • 5
  1. 1.German University in CairoNew Cairo CityEgypt
  2. 2.Institute for Integrative Nanosciences, IFW DresdenDresdenGermany
  3. 3.Material Systems for NanoelectronicsUniversity of Technology ChemnitzChemnitzGermany
  4. 4.Max Planck Institute for Intelligent SystemsStuttgartGermany
  5. 5.MIRA–Institute for Biomedical Technology and Technical MedicineUniversity of TwenteEnschedeNetherlands

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