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...
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Nature Portfolio
2021
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oai:doaj.org-article:921425d172e542b297db274d48b0d51a2021-11-14T12:20:17ZTranslatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes10.1038/s41598-021-01351-x2045-2322https://doaj.org/article/921425d172e542b297db274d48b0d51a2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01351-xhttps://doaj.org/toc/2045-2322Abstract 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.Rico HuhnstockMeike ReginkaAndreea TomitaMaximilian MerkelKristina DingelDennis HolzingerBernhard SickMichael VogelArno EhresmannNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021) |
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DOAJ |
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Medicine R Science Q |
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Medicine R Science Q Rico Huhnstock Meike Reginka Andreea Tomita Maximilian Merkel Kristina Dingel Dennis Holzinger Bernhard Sick Michael Vogel Arno Ehresmann Translatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes |
| description |
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. |
| format |
article |
| author |
Rico Huhnstock Meike Reginka Andreea Tomita Maximilian Merkel Kristina Dingel Dennis Holzinger Bernhard Sick Michael Vogel Arno Ehresmann |
| author_facet |
Rico Huhnstock Meike Reginka Andreea Tomita Maximilian Merkel Kristina Dingel Dennis Holzinger Bernhard Sick Michael Vogel Arno Ehresmann |
| author_sort |
Rico Huhnstock |
| title |
Translatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes |
| title_short |
Translatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes |
| title_full |
Translatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes |
| title_fullStr |
Translatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes |
| title_full_unstemmed |
Translatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes |
| title_sort |
translatory and rotatory motion of exchange-bias capped janus particles controlled by dynamic magnetic field landscapes |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/921425d172e542b297db274d48b0d51a |
| work_keys_str_mv |
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