Probing magnetization dynamics of iron oxide nanoparticles using a point-probe magneto-optical method
Magnetic nanoparticles (MNPs) are promising as local heat generators for magnetic hyperthermia under AC magnetic fields. The heating efficacy of MNPs is determined by the AC hysteresis loop area, which in turn is affected by the dynamic magnetic properties of the nanoparticles. Whilst inductive-base...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-08-01
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| Series: | Frontiers in Nanotechnology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fnano.2023.1214313/full |
| _version_ | 1797745379812311040 |
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| author | Xuyiling Wang David Cabrera Ying Yang Neil Telling |
| author_facet | Xuyiling Wang David Cabrera Ying Yang Neil Telling |
| author_sort | Xuyiling Wang |
| collection | DOAJ |
| description | Magnetic nanoparticles (MNPs) are promising as local heat generators for magnetic hyperthermia under AC magnetic fields. The heating efficacy of MNPs is determined by the AC hysteresis loop area, which in turn is affected by the dynamic magnetic properties of the nanoparticles. Whilst inductive-based AC magnetometers can measure the average magnetic behavior of samples, the use of the magneto-optical Faraday effect with a focused laser spot allows point-probe measurements to be made, and without some of the magnetic field limitations imposed by inductive methods. In this work, the AC magnetic properties of different sized iron oxide MNPs in suspension were measured by AC magnetometry and AC susceptibility techniques. AC hysteresis loops measured by magneto-optical magnetometry were validated using a commercial inductive AC magnetometer, and compared to the magnetization relaxation behavior revealed by fitting the AC susceptibility data. The spatial sensitivity of the point-probe magneto-optical method is also demonstrated by measuring the AC hysteresis loop from large (>1 μm) MNP aggregates dried onto glass slides. These aggregated particles are found to be magnetically softer than in their suspension form, suggesting interparticle coupling mechanisms could occur when the nanoparticles form dense aggregates. |
| first_indexed | 2024-03-12T15:22:26Z |
| format | Article |
| id | doaj.art-0cbd2d912367480eb4943063d943e980 |
| institution | Directory Open Access Journal |
| issn | 2673-3013 |
| language | English |
| last_indexed | 2024-03-12T15:22:26Z |
| publishDate | 2023-08-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Nanotechnology |
| spelling | doaj.art-0cbd2d912367480eb4943063d943e9802023-08-10T23:28:57ZengFrontiers Media S.A.Frontiers in Nanotechnology2673-30132023-08-01510.3389/fnano.2023.12143131214313Probing magnetization dynamics of iron oxide nanoparticles using a point-probe magneto-optical methodXuyiling WangDavid CabreraYing YangNeil TellingMagnetic nanoparticles (MNPs) are promising as local heat generators for magnetic hyperthermia under AC magnetic fields. The heating efficacy of MNPs is determined by the AC hysteresis loop area, which in turn is affected by the dynamic magnetic properties of the nanoparticles. Whilst inductive-based AC magnetometers can measure the average magnetic behavior of samples, the use of the magneto-optical Faraday effect with a focused laser spot allows point-probe measurements to be made, and without some of the magnetic field limitations imposed by inductive methods. In this work, the AC magnetic properties of different sized iron oxide MNPs in suspension were measured by AC magnetometry and AC susceptibility techniques. AC hysteresis loops measured by magneto-optical magnetometry were validated using a commercial inductive AC magnetometer, and compared to the magnetization relaxation behavior revealed by fitting the AC susceptibility data. The spatial sensitivity of the point-probe magneto-optical method is also demonstrated by measuring the AC hysteresis loop from large (>1 μm) MNP aggregates dried onto glass slides. These aggregated particles are found to be magnetically softer than in their suspension form, suggesting interparticle coupling mechanisms could occur when the nanoparticles form dense aggregates.https://www.frontiersin.org/articles/10.3389/fnano.2023.1214313/fullmagnetic hyperthermiaFaraday effectmagnetic nanoparticlesAC magnetometryAC susceptibility |
| spellingShingle | Xuyiling Wang David Cabrera Ying Yang Neil Telling Probing magnetization dynamics of iron oxide nanoparticles using a point-probe magneto-optical method Frontiers in Nanotechnology magnetic hyperthermia Faraday effect magnetic nanoparticles AC magnetometry AC susceptibility |
| title | Probing magnetization dynamics of iron oxide nanoparticles using a point-probe magneto-optical method |
| title_full | Probing magnetization dynamics of iron oxide nanoparticles using a point-probe magneto-optical method |
| title_fullStr | Probing magnetization dynamics of iron oxide nanoparticles using a point-probe magneto-optical method |
| title_full_unstemmed | Probing magnetization dynamics of iron oxide nanoparticles using a point-probe magneto-optical method |
| title_short | Probing magnetization dynamics of iron oxide nanoparticles using a point-probe magneto-optical method |
| title_sort | probing magnetization dynamics of iron oxide nanoparticles using a point probe magneto optical method |
| topic | magnetic hyperthermia Faraday effect magnetic nanoparticles AC magnetometry AC susceptibility |
| url | https://www.frontiersin.org/articles/10.3389/fnano.2023.1214313/full |
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