Moeni, M. orcid.org/0000-0003-3900-9128, Edokali, M. orcid.org/0009-0005-6445-6394, Rogers, M. orcid.org/0000-0002-4550-2392 et al. (5 more authors) (2024) Effect of reaction and post-treatment conditions on physico-chemical properties of magnetic iron oxide nano-particles. Particuology, 91. pp. 155-167. ISSN 1674-2001
Abstract
Poor stability and dispersibility, as well as aggregation are considered as major challenges in clinical application of iron oxide nanoparticles (IONPs). Several studies have shown that the synthesis parameters and post-synthesis treatments e.g., drying methods, have the capability to improve the particles' characteristics. Herein, we investigate the combined effect of synthesis and post-treatment parameters on the particle size, stability and magnetism of IONPs. Magnetite (Fe3O4) NPs were prepared via co-precipitation and post-treated using different methods, i.e. (i) freeze dried at –53 °C, 0.133 mbar for 48 h (liquid nitrogen frozen (LFD) and freezer frozen (FFD)), (ii) vacuum oven dried (VOD) at 60 °C for 24 h, and (iii) kept wet colloidal (WET), dispersed in deionized water. The Fe3O4 NPs’ chemical functional groups, size, shape, crystallinity, stability, aggregation, porosity, and magnetic properties were further analysed using different characterisation techniques. Analytical results showed that, while the WET sample had the best stability and significantly less aggregation at different temperatures, amongst post-treated Fe3O4 NPs, LFD sample exhibited the best stability (up to 37 °C), dispersion and smallest polydispersity index. Furthermore, all dried NPs had superparamagnetic characteristics, while, LFD Fe3O4 NPs had better magnetic properties and stability than other drying methods.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Iron oxide nanoparticles; Co-precipitation; Stability; Aggregation; Magnetic properties |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 23 Apr 2024 12:32 |
Last Modified: | 23 Apr 2024 12:32 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.partic.2024.02.006 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:211696 |