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256. 


Control over Janus micromotors by the strength of a magnetic field



L. Baraban, D. Makarov, O. G. Schmidt, G. Cuniberti, P. Leiderer, A. Erbe

Nanoscale 5, 1332 (2013)

For transportation of molecules or biological cells using artificial motors, the control over their motion, i.e. direction and speed of transfer, is important. Here, we demonstrate that modification of the velocity and orientation of a magnetic Janus particle can be efficiently controlled by tuning the strength of an applied homogeneous magnetic field. Interestingly, by keeping the same orientation of the magnetic field but changing its magnitude not only the velocity of capped particles can be altered but even their direction of motion can be reversed. We put forth a simple qualitative model, which allows us to explain this intriguing observation.



doi absolute link10.1039/C2NR32662K
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