Effect of reaction and post-treatment conditions on physico-chemical properties of magnetic iron oxide nano-particles

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外文摘要：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 param-eters 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 ℃,0.133 mbar for 48 h(liquid nitrogen frozen(LFD)and freezer frozen(FFD)),(ⅱ)vacuum oven dried(VOD)at 60 ℃ 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 ℃),dispersion and smallest poly-dispersity index.Furthermore,all dried NPs had superparamagnetic characteristics,while,LFD Fe3O4 NPs had better magnetic properties and stability than other drying methods.

外文关键词：

Iron oxide nanoparticlesCo-precipitationStabilityAggregationMagnetic properties

作者：

Masome Moeni、Mohamed Edokali、Matthew Rogers、Oscar Cespedes、Louey Tliba、Tamseela Habib、Robert Menzel、Ali Hassanpour

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作者单位：

School of Chemical and Process Engineering,Faculty of Engineering and Physical Science,University of Leeds,Leeds,LS2 9JT,UK

School of Physics and Astronomy,Faculty of Engineering and Physical Science,University of Leeds,Leeds,LS2 9JT,UK

Mechanical Engineering Department,University of Engineering & Technology,Lahore,Pakistan

School of Chemistry,Faculty of Engineering and Physical Science,University of Leeds,Leeds,LS2 9JT,UK

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基金：

University of Leeds through the Sanctuary Scholarship

项目编号：

出版年：

2024

DOI：

10.1016/j.partic.2024.02.006

颗粒学报(英文版)

中国颗粒学会　中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCD

影响因子：0.632

ISSN：1674-2001

年,卷(期)：2024.91(8)