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Manipulation of magnetic nanorod clusters in liquid by non-uniform alternating magnetic fields

Abstract

It is discovered that a non-uniform alternating magnetic field can induce a translational motion of an anisotropic magnetic particle or cluster near a surface. Unlike a permanent magnet pulling a magnetic particle, the particle moves away from the magnetic source with a periodic fluctuation in its trajectory that varies with a frequency that is twice that of the field frequency. The moving speed can be tuned by varying the magnetic field strength and gradient, its alternating frequency, and the particle size. A hydrodynamic model is developed that can qualitatively explain all of the phenomena observed. Such a simple particle manipulation method has a great potential in applications such as cell biology and microfluidics.

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Publication details

The article was received on 09 Mar 2017, accepted on 20 Apr 2017 and first published on 21 Apr 2017


Article type: Paper
DOI: 10.1039/C7SM00488E
Citation: Soft Matter, 2017, Accepted Manuscript
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    Manipulation of magnetic nanorod clusters in liquid by non-uniform alternating magnetic fields

    W. Huang, F. Yang, L. Zhu, R. Qiao and Y. Zhao, Soft Matter, 2017, Accepted Manuscript , DOI: 10.1039/C7SM00488E

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