Aufsatz
Translatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes
Abstract
Magnetic Janus particles (MJPs), fabricated by covering a non-magnetic spherical particle with a hemispherical magnetic in-plane exchange-bias layer system cap, display an onion magnetization state for comparably large diameters of a few microns. In this work, the motion characteristics of these MJPs will be investigated when they are steered by a magnetic field landscape over prototypical parallel-stripe domains, dynamically varied by superposed external magnetic field pulse sequences, in an aqueous medium. We demonstrate, that due to the engineered magnetization state in the hemispherical cap, a comparably fast, directed particle transport and particle rotation can be induced. Additionally, by modifying the frequency of the applied pulse sequence and the strengths of the individual field components, we observe a possible separation between a combined or an individual occurrence of these two types of motion. Our findings bear importance for lab-on-a-chip systems, where particle immobilization on a surface via analyte bridges shall be used for low concentration analyte detection and a particle rotation over a defined position of a substrate may dramatically increase the immobilization (and therefore analyte detection) probability.
Sponsorship
Gefördert durch den Publikationsfonds der Universität KasselCitation
@article{doi:10.17170/kobra-202204216062,
author={Huhnstock, Rico and Reginka, Meike and Tomiţa, Andreea and Merkel, Maximilian and Dingel, Kristina and Holzinger, Dennis and Sick, Bernhard and Vogel, Michael and Ehresmann, Arno},
title={Translatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes},
journal={Scientific reports},
year={2021}
}
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3010 Tomiţa, Andreea
3010 Merkel, Maximilian
3010 Dingel, Kristina
3010 Holzinger, Dennis
3010 Sick, Bernhard
3010 Vogel, Michael
3010 Ehresmann, Arno
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5550 {{Angewandte Physik}}
5550 {{Kolloid}}
5550 {{Lab on a Chip}}
5550 {{Magnetische Eigenschaft}}
5550 {{Sensor}}
5550 {{Biosensor}}
7136 ##0##http://hdl.handle.net/123456789/13772
<resource xsi:schemaLocation="http://datacite.org/schema/kernel-2.2 http://schema.datacite.org/meta/kernel-2.2/metadata.xsd"> 2022-04-22T15:45:50Z 2022-04-22T15:45:50Z 2021-11-08 doi:10.17170/kobra-202204216062 http://hdl.handle.net/123456789/13772 Gefördert durch den Publikationsfonds der Universität Kassel eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ applied physics colloids lab-on-a-chip magnetic properties and materials sensors and biosensors 530 600 Translatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes Aufsatz Magnetic Janus particles (MJPs), fabricated by covering a non-magnetic spherical particle with a hemispherical magnetic in-plane exchange-bias layer system cap, display an onion magnetization state for comparably large diameters of a few microns. In this work, the motion characteristics of these MJPs will be investigated when they are steered by a magnetic field landscape over prototypical parallel-stripe domains, dynamically varied by superposed external magnetic field pulse sequences, in an aqueous medium. We demonstrate, that due to the engineered magnetization state in the hemispherical cap, a comparably fast, directed particle transport and particle rotation can be induced. Additionally, by modifying the frequency of the applied pulse sequence and the strengths of the individual field components, we observe a possible separation between a combined or an individual occurrence of these two types of motion. Our findings bear importance for lab-on-a-chip systems, where particle immobilization on a surface via analyte bridges shall be used for low concentration analyte detection and a particle rotation over a defined position of a substrate may dramatically increase the immobilization (and therefore analyte detection) probability. open access Huhnstock, Rico Reginka, Meike Tomiţa, Andreea Merkel, Maximilian Dingel, Kristina Holzinger, Dennis Sick, Bernhard Vogel, Michael Ehresmann, Arno doi:10.1038/s41598-021-01351-x Angewandte Physik Kolloid Lab on a Chip Magnetische Eigenschaft Sensor Biosensor publishedVersion eissn:2045-2322 Scientific reports Volume 11 false 21794 </resource>
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