Improving magnetic properties of Mn and Zn doped polyhedral core/shell iron oxide nanoparticles by tuning their size

chemistry Medicinal and pharmaceutical chemistry Nano- and molecular-scale electronics Nano-biomaterials and bioscience Nanomagnetics Nanomaterials, thin films and nanointerfaces Nanomedicine Nanometrology and nanomechanics Nano-optics Nanopatterning, self-assembly and nanofabrication Nanostructures for energy and sensing applications Natural products chemistry Organo main group chemistry Other nanotechnology (unclassified) Other organic chemistry (unclassified) Photochemistry and photovoltaics Physical organic chemistry Supramolecular chemistry Superparamagnetic iron oxide nanoparticles (SPIONPs) offer promising applications in nanomedicine due to their appealing properties. Their magnetic and magnetic hyperthermia properties are considered as relevant tools for low invasive cancer therapeutic applications. In this work, we report on the synthesis of polyhedral core/shell SPIONPs. Their size was tuned to improve their magnetic properties. Furthermore, by hybridizing into a core/shell inorganic/inorganic structure, the nanoparticles can achieve significantly improved magnetic-to-thermal energy conversion efficiency (at least of 10 fold). The designed core NPs will then be composed of a core composed of Zn0.4Fe2.6O4 and a shell of MnFe2O4. Their size and morphology were determined by transmission electron microscopy (TEM), Fourier transform infra- red (FTIR) was used to investigate their chemical composition. The iron oxide phase was confirmed by Mössbauer analysis, and their magnetic properties were studied to select the ideal size for magnetic hyperthermia application.

core/shell nanoparticles, magnetic properties, magnetic hyperthermia | Format: DOCX | Size: 333.8 KB | Download | When a peer-reviewed version of this preprint is available, this information will be updated in the information box above. If no peer-reviewed version is available, please cite this preprint using the following information: Louaguef, D.; Medjahdi, G.; Diliberto, S.; Seemann, K. M.; Gries, T.; Bizeau, J.; Mertz, D.; Gaffet, E.; Alem, H. Beilstein Arch. 2025, 202525. doi:10.3762/bxiv.2025.25.v1 Citation data can be downloaded as file using the "Download" button or used for copy/paste from the text window below. Citation data in RIS format can be imported by all major citation management software, including EndNote, ProCite, RefWorks, and Zotero. © 2025 Louaguef et al.; licensee Beilstein-Institut. This is an open access work licensed under the terms of the Beilstein-Institut Open Access License Agreement (https://www.beilstein-archives.org/xiv/terms), which is identical to the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0). The reuse of material under this license requires that the author(s), source and license are credited. Third-party material in this work could be subject to other licenses (typically indicated in the credit line), and in this case, users are required to obtain permission from the license holder to reuse the material.