Iron Oxide Nanorings and Nanotubes for Magnetic Hyperthermia: The Problem of Intraparticle Interactions
Magnetic interactions can play an important role in the heating efficiency of magnetic nanoparticles. Although most of the time interparticle magnetic interactions are a dominant source, in specific cases such as multigranular nanostructures intraparticle interactions are also relevant and their eff...
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doaj-b704d63e6d3e4c57a0213d50c80e41032021-06-01T00:53:57ZengMDPI AGNanomaterials2079-49912021-05-01111380138010.3390/nano11061380Iron Oxide Nanorings and Nanotubes for Magnetic Hyperthermia: The Problem of Intraparticle InteractionsRaja Das0Javier Alonso Masa1Vijaysankar Kalappattil2Zohreh Nemati3Irati Rodrigo4Eneko Garaio5José Ángel García6Manh-Huong Phan7Hariharan Srikanth8Faculty of Materials Science and Engineering, Phenikaa University, Hanoi 12116, VietnamDepartamento CITIMAC, Universidad de Cantabria, 39005 Santander, SpainDepartment of Physics, University of South Florida (USF), Tampa, FL 33620, USADepartment of Physics, University of South Florida (USF), Tampa, FL 33620, USADepartamento de Electricidad y Electrónica, Universidad del País Vasco (UPV/EHU), 48940 Leioa, SpainDepartamento de Física Aplicada, Universidad Pública de Navarra (UPN), 31006 Pamplona, SpainDepartamento de Física, Universidad del País Vasco (UPV/EHU), 48940 Leioa, SpainDepartment of Physics, University of South Florida (USF), Tampa, FL 33620, USADepartment of Physics, University of South Florida (USF), Tampa, FL 33620, USAMagnetic interactions can play an important role in the heating efficiency of magnetic nanoparticles. Although most of the time interparticle magnetic interactions are a dominant source, in specific cases such as multigranular nanostructures intraparticle interactions are also relevant and their effect is significant. In this work, we have prepared two different multigranular magnetic nanostructures of iron oxide, nanorings (NRs) and nanotubes (NTs), with a similar thickness but different lengths (55 nm for NRs and 470 nm for NTs). In this way, we find that the NTs present stronger intraparticle interactions than the NRs. Magnetometry and transverse susceptibility measurements show that the NTs possess a higher effective anisotropy and saturation magnetization. Despite this, the AC hysteresis loops obtained for the NRs (0–400 Oe, 300 kHz) are more squared, therefore giving rise to a higher heating efficiency (maximum specific absorption rate, SAR<sub>max</sub> = 110 W/g for the NRs and 80 W/g for the NTs at 400 Oe and 300 kHz). These results indicate that the weaker intraparticle interactions in the case of the NRs are in favor of magnetic hyperthermia in comparison with the NTs.https://www.mdpi.com/2079-4991/11/6/1380magnetic nanoparticlesbiomedical applicationsnanomagnetismmagnetic interactionmagnetic hyperthermia |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Raja Das Javier Alonso Masa Vijaysankar Kalappattil Zohreh Nemati Irati Rodrigo Eneko Garaio José Ángel García Manh-Huong Phan Hariharan Srikanth |
spellingShingle |
Raja Das Javier Alonso Masa Vijaysankar Kalappattil Zohreh Nemati Irati Rodrigo Eneko Garaio José Ángel García Manh-Huong Phan Hariharan Srikanth Iron Oxide Nanorings and Nanotubes for Magnetic Hyperthermia: The Problem of Intraparticle Interactions Nanomaterials magnetic nanoparticles biomedical applications nanomagnetism magnetic interaction magnetic hyperthermia |
author_facet |
Raja Das Javier Alonso Masa Vijaysankar Kalappattil Zohreh Nemati Irati Rodrigo Eneko Garaio José Ángel García Manh-Huong Phan Hariharan Srikanth |
author_sort |
Raja Das |
title |
Iron Oxide Nanorings and Nanotubes for Magnetic Hyperthermia: The Problem of Intraparticle Interactions |
title_short |
Iron Oxide Nanorings and Nanotubes for Magnetic Hyperthermia: The Problem of Intraparticle Interactions |
title_full |
Iron Oxide Nanorings and Nanotubes for Magnetic Hyperthermia: The Problem of Intraparticle Interactions |
title_fullStr |
Iron Oxide Nanorings and Nanotubes for Magnetic Hyperthermia: The Problem of Intraparticle Interactions |
title_full_unstemmed |
Iron Oxide Nanorings and Nanotubes for Magnetic Hyperthermia: The Problem of Intraparticle Interactions |
title_sort |
iron oxide nanorings and nanotubes for magnetic hyperthermia: the problem of intraparticle interactions |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2021-05-01 |
description |
Magnetic interactions can play an important role in the heating efficiency of magnetic nanoparticles. Although most of the time interparticle magnetic interactions are a dominant source, in specific cases such as multigranular nanostructures intraparticle interactions are also relevant and their effect is significant. In this work, we have prepared two different multigranular magnetic nanostructures of iron oxide, nanorings (NRs) and nanotubes (NTs), with a similar thickness but different lengths (55 nm for NRs and 470 nm for NTs). In this way, we find that the NTs present stronger intraparticle interactions than the NRs. Magnetometry and transverse susceptibility measurements show that the NTs possess a higher effective anisotropy and saturation magnetization. Despite this, the AC hysteresis loops obtained for the NRs (0–400 Oe, 300 kHz) are more squared, therefore giving rise to a higher heating efficiency (maximum specific absorption rate, SAR<sub>max</sub> = 110 W/g for the NRs and 80 W/g for the NTs at 400 Oe and 300 kHz). These results indicate that the weaker intraparticle interactions in the case of the NRs are in favor of magnetic hyperthermia in comparison with the NTs. |
topic |
magnetic nanoparticles biomedical applications nanomagnetism magnetic interaction magnetic hyperthermia |
url |
https://www.mdpi.com/2079-4991/11/6/1380 |
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