Translatory and rotatory motion of exchange-bias capped Janus particles controlled by dynamic magnetic field landscapes
| Autor: | Meike Reginka, Bernhard Sick, Dennis Holzinger, Maximilian Merkel, Andreea Tomita, Kristina Dingel, Rico Huhnstock, Arno Ehresmann, Michael Vogel |
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| Rok vydání: | 2021 |
| Předmět: |
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Materials science Field (physics) Science FOS: Physical sciences Kolloid Janus particles Applied Physics (physics.app-ph) Condensed Matter - Soft Condensed Matter Molecular physics Article Magnetization Magnetic properties and materials Colloids Lab on a Chip Sensor Multidisciplinary Lab-on-a-chip Magnetische Eigenschaft Angewandte Physik Pulse sequence Physics - Applied Physics Sensors and biosensors Magnetic field Applied physics Exchange bias Data Management and Analysis Particle Medicine Soft Condensed Matter (cond-mat.soft) Biosensor |
| Zdroj: | Scientific Reports Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021) |
| ISSN: | 2045-2322 |
| Popis: | Magnetic Janus particles MJPs , fabricated by covering a non amp; 8209;magnetic spherical particle with a hemispherical magnetic in amp; 8209;plane exchange amp; 8209;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 amp; 8209;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 amp; 8209;on amp; 8209;a amp; 8209;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 |
| Databáze: | OpenAIRE |
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