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Issue 4, 2013

Control over Janus micromotors by the strength of a magnetic field

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Abstract

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.

Graphical abstract: Control over Janus micromotors by the strength of a magnetic field

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Article information


Submitted
07 Sep 2012
Accepted
21 Nov 2012
First published
27 Nov 2012

Nanoscale, 2013,5, 1332-1336
Article type
Paper

Control over Janus micromotors by the strength of a magnetic field

L. Baraban, D. Makarov, O. G. Schmidt, G. Cuniberti, P. Leiderer and A. Erbe, Nanoscale, 2013, 5, 1332 DOI: 10.1039/C2NR32662K

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