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Orientation of Electrospun Magnetic Nanofibers Near Conductive Areas

1
Bielefeld University of Applied Sciences, Faculty of Engineering and Mathematics, 33619 Bielefeld, Germany
2
Silesian University of Technology, Institute of Physics—CSE, 44-100 Gliwice, Poland
*
Author to whom correspondence should be addressed.
Materials 2020, 13(1), 47; https://doi.org/10.3390/ma13010047
Received: 14 November 2019 / Revised: 17 December 2019 / Accepted: 19 December 2019 / Published: 20 December 2019
(This article belongs to the Special Issue Electrospinning: Nanofabrication and Application)
Electrospinning can be used to create nanofibers from diverse polymers in which also other materials can be embedded. Inclusion of magnetic nanoparticles, for example, results in preparation of magnetic nanofibers which are usually isotropically distributed on the substrate. One method to create a preferred direction is using a spinning cylinder as the substrate, which is not always possible, especially in commercial electrospinning machines. Here, another simple technique to partly align magnetic nanofibers is investigated. Since electrospinning works in a strong electric field and the fibers thus carry charges when landing on the substrate, using partly conductive substrates leads to a current flow through the conductive parts of the substrate which, according to Ampère’s right-hand grip rule, creates a magnetic field around it. We observed that this magnetic field, on the other hand, can partly align magnetic nanofibers perpendicular to the borders of the current flow conductor. We report on the first observations of electrospinning magnetic nanofibers on partly conductive substrates with some of the conductive areas additionally being grounded, resulting in partly oriented magnetic nanofibers. View Full-Text
Keywords: electrospinning; magnetic nanofibers; magnetite; magnetic field lines; Ampère’s right-hand grip rule; Maxwell equations electrospinning; magnetic nanofibers; magnetite; magnetic field lines; Ampère’s right-hand grip rule; Maxwell equations
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MDPI and ACS Style

Storck, J.L.; Grothe, T.; Mamun, A.; Sabantina, L.; Klöcker, M.; Blachowicz, T.; Ehrmann, A. Orientation of Electrospun Magnetic Nanofibers Near Conductive Areas. Materials 2020, 13, 47.

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