Reversible magnetism switching of iron oxide nanoparticle dispersions by controlled agglomeration
- The controlled agglomeration of superparamagnetic iron oxide nanoparticles (SPIONs) was used to rapidly switch their magnetic properties. Small-angle X-ray scattering (SAXS) and dynamic light scattering showed that tailored iron oxide nanoparticles with phase-changing organic ligands shells agglomerate at temperatures between 5 °C and 20 °C. We observed the concurrent change in magnetic properties using magnetic particle spectroscopy (MPS) with a temporal resolution at the order of seconds and found reversible switching of magnetic properties of SPIONs by changing their agglomeration state. The non-linear correlation between magnetization amplitude from MPS and agglomeration degree from SAXS data indicated that the agglomerates’ size distribution affected magnetic properties.
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| Document Type: | Article |
|---|---|
| Author: | Stephan Müssig, Björn KuttichORCiD, Florian Fidler, Daniel Haddad, Susanne WintzheimerORCiD, Tobias KrausORCiD, Karl MandelORCiD |
| URN: | urn:nbn:de:bsz:291:415-1195 |
| DOI: | https://doi.org/10.1039/D1NA00159K |
| Parent Title (English): | Nanoscale Advances |
| Volume: | 3 |
| Issue: | 10 |
| First Page: | 2822 |
| Last Page: | 2829 |
| Language: | English |
| Year of first Publication: | 2021 |
| Release Date: | 2022/08/16 |
| Impact: | 05.598 (2021) |
| Funding Information: | Bundesministerium für Bildung und Forschung (NanoMatFutur Grant 03XP0149); Deutsche Bundesstiftung Umwelt |
| Scientific Units: | Structure Formation |
| DDC classes: | 500 Naturwissenschaften und Mathematik / 540 Chemie |
| Open Access: | Open Access |
| Signature: | INM 2021/034 |
| Licence (German): |  Creative Commons - CC BY - Namensnennung 4.0 International |
