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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Islam, Riyajul
Aarhus University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2023First-principles study on the enhancement of structure stability and magnetocrystalline anisotropy energy of L1 0 -ordered Mn 1−x Fe x AlC compound for permanent magnet applicationcitations
- 2023First-principles study on the enhancement of structure stability and magnetocrystalline anisotropy energy of L10-ordered Mn1−xFexAlC compound for permanent magnet applicationcitations
- 2021Effect of surface functionalization on the heating efficiency of magnetite nanoclusters for hyperthermia applicationcitations
- 2020Prediction of large magnetic anisotropy for non-rare-earth based permanent magnet of Fe16 - XMnxN2alloyscitations
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article
Effect of surface functionalization on the heating efficiency of magnetite nanoclusters for hyperthermia application
Abstract
<p>Here we report the effect of surface functionalization on Fe<sub>3</sub>O<sub>4</sub> assembled nanoclusters with biopolymers, like chitosan and dextran using the solvo-thermal route. XRD analyses confirmed the formation of cubic spinel structure with crystallite sizes ranging from 11 to 14 nm. HRTEM analyses revealed the formation of spherical nanoclusters. Magnetic measurements demonstrate the typical ferromagnetic behavior with saturation magnetization (M<sub>s</sub>) up to 71.048, 69.829 and 68.228 Am<sup>2</sup>Kg<sup>−1</sup> for Fe<sub>3</sub>O<sub>4</sub> (FO), chitosan coated Fe<sub>3</sub>O<sub>4</sub> (CFO) and dextran coated Fe<sub>3</sub>O<sub>4</sub> (DFO) respectively at room temperature. Negligible coercivity (H<sub>c</sub>) and remenance (M<sub>r</sub>) at room temperature implies nearly superparamagnetic behavior. Field cooled (FC) and Zero field cooled (ZFC) measurements of magnetization at an applied field of 100 Oe resulting in the blocking temperature above room temperature for all the samples. Induction heating ability of the samples under alternating magnetic field were studied by means of specific absorption rate measurements (SAR). It is shown that the surface functionalization significantly enhanced the SAR value up to 40% i.e., from 144.08 W/g for FO to 233.28 W/g for DFO at 1 mg/ml concentration. The study also concluded that the dipolar interactions are solely responsible for self-heating behavior of the nanoparticles. It was observed that by changing the sample concentration and different coatings, the final temperature can be tuned to the intended therapeutic (hyperthermia) temperature range (40–44 °C). The in vitro cytocompatibility test resulted in cell viability of more than 90%, which proved that the prepared nanomaterials are promising for the hyperthermia applications.</p>