Abstract
Magnetite (Fe3O4) nanoparticles (NPs) are attractive nanomaterials in the field of material science, chemistry, and physics because of their valuable properties, such as soft ferromagnetism, half-metallicity, and biocompatibility. Various structures of Fe3O4 NPs with different sizes, geometries, and nanoarchitectures have been synthesized, and the related properties have been studied with targets in multiple fields of applications, including biomedical devices, electronic devices, environmental solutions, and energy applications. Tailoring the sizes, geometries, magnetic properties, and functionalities is an important task that determines the performance of Fe3O4 NPs in many applications. Therefore, this review focuses on the crucial aspects of Fe3O4 NPs, including structures, synthesis, magnetic properties, and strategies for functionalization, which jointly determine the application performance of various Fe3O4 NP-based systems. We first summarize the recent advances in the synthesis of magnetite NPs with different sizes, morphologies, and magnetic properties. We also highlight the importance of synthetic factors in controlling the structures and properties of NPs, such as the uniformity of sizes, morphology, surfaces, and magnetic properties. Moreover, emerging applications using Fe3O4 NPs and their functionalized nanostructures are also highlighted with a focus on applications in biomedical technologies, biosensing, environmental remedies for water treatment, and energy storage and conversion devices.
Highlights
Magnetic nanoparticles (MNPs) are an interesting class of nanomaterials that have been extensively explored for use in many technological applications [1,2,3,4,5]
This review provides updates on recent progress and covers important aspects of applied Fe3 O4 NPs, including structures and synthesis, magnetic properties, strategies for functionalization, and performance of Fe3 O4 -based NPs in various emerging applications
Fe3 O4 NPs and magnetic properties are two important features that could be tailored by applying appropriate synthetic strategies
Summary
Magnetic nanoparticles (MNPs) are an interesting class of nanomaterials that have been extensively explored for use in many technological applications [1,2,3,4,5]. The biocompatibility of iron oxide NPs is the main driving force of substantial research efforts to commercialize these NPs for advanced medical technology applications [14]. In the last two decades, research on Fe3 O4 NPs has achieved remarkable progress in the synthesis of homogeneous core magnetic Fe3 O4 NPs and the preparation of advanced nanoarchitectures (core–shell, composites, functionalized surfaces, etc.) and the application of these nanomaterials in various fields [16,17,18,19]. O nanomaterials by the reThese numbers reflect the great attention given to Fe3 O4 nanomaterials by the research search community in both fundamental studies and applied science.
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