Sub-20-nm magnetite-based core-shell nanoparticles with strong magnetic, magnetoelectric, and nanocatalytic properties

doi:10.1016/j.ceramint.2025.02.331

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Wagner, Dmitriy V. | 2025

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DOI Доступ к ресурсу на сайте издателя			10.1016/j.ceramint.2025.02.331

#магнитоэлектрики

#магнетит

#нанокатализ

#наночастицы типа "ядро-оболочка"

Title: Sub-20-nm magnetite-based core-shell nanoparticles with strong magnetic, magnetoelectric, and nanocatalytic properties
Creator: Urakova, Alina O.
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Baksheev, Artem
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Pryadko, Artyom S.
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Grubova, Irina Yu.
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Surmeneva, Maria A.
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Chernozem, Polina V.
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Mukhortova, Yulia R.
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Wagner, Dmitriy V.
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Gerasimov, Evgeny Yu.
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Kazantsev, Sergey O.
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Lozhkomoev, Aleksandr S.
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Lisitsyn, Sergey A.
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Sukhorukov, Gleb B.
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Surmenev, Roman A.
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Chernozem, Roman V.
Date: 2025
DOI: 10.1016/j.ceramint.2025.02.331
Description: Magnetoelectric (ME) nanoparticles (NPs) have garnered much attention of researchers in the field of biomedicine owing to multiferroic properties. Here, novel sub-20-nm ME core–shell NPs—based on biocompatible magnetic Fe3O4 (FO) as a magnetostrictive core and ferroelectric perovskite Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) as a ferroelectric shell—were designed for the first time via in situ microwave-assisted hydrothermal synthesis. Comprehensive characterization confirmed epitaxial growth of the very thin (down to 5 nm) ferroelectric perovskite BCZT shell on the spinel FO core, with an average size of 14.5 ± 4.6 nm (mean ± standard deviation). These sub-20-nm ME FO@BCZT core–shell NPs showed high saturation magnetization (24.8 ± 0.7 emu/g). Furthermore, FO@BCZT NPs manifested robust piezoelectricity (13 ± 3 p.m./V) and a superior ME coefficient (11.9 × 105 mV/[cm•Oe]), which is comparable to that of potentially toxic Co-based analogs and significantly higher than values reported for larger magnetite-based ME NPs. Notably, ME performance of FO@BCZT NPs was tested and showed 85 % efficiency of degradation of model pollutant Rhodamine 6G after 3 h of treatment with a safe low-intensity alternating magnetic field (150 mT, 100 Hz). Thus, the newly developed ME core–shell FO@BCZT NPs are a promising candidate for diverse applications: from nanocatalysis to targeted drug delivery and cancer therapy.