Design strategies for shape-controlled magnetic iron oxide nanoparticles

Roca, Alejandro G.; Gutiérrez, Lucía; Gavilán, Helena; Brollo, Maria Eugênia Fortes; Veintemillas-Verdaguer, Sabino; Morales, M.P.

doi:10.1016/j.addr.2018.12.008

Cited by 239 publications

(208 citation statements)

References 357 publications

(396 reference statements)

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“…In Fig. 5 we plot the orientation dependence in spherical polar coordinates (θ , φ ) of the effective anisotropy energy for a 6 nm lateral (x, y) particle size for different elongations in the range 0-20% typically seen for uniform experimental samples 13 where elongated particles are not deliberately engineered 45 . For zero elongation Fig.…”

Section: /16mentioning

confidence: 99%

The role of faceting and elongation on the magnetic anisotropy of magnetite Fe3O4 nanocrystals

Moreno

Poyser

Meilak

et al. 2020

Sci Rep

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Fe 3 O 4 nanoparticles are one of the most promising candidates for biomedical applications such as magnetic hyperthermia and theranostics due to their bio-compatibility, structural stability and good magnetic properties. However, much is unknown about the nanoscale origins of the observed magnetic properties of particles due to the dominance of surface and finite size effects. Here we have developed an atomistic spin model of elongated magnetite nanocrystals to specifically address the role of faceting and elongation on the magnetic shape anisotropy. We find that for faceted particles simple analytical formulae overestimate the magnetic shape anisotropy and that the underlying cubic anisotropy makes a significant contribution to the energy barrier for moderately elongated particles. Our results enable a better estimation of the effective magnetic anisotropy of highly crystalline magnetite nanoparticles and is a step towards quantitative prediction of the heating effects of magnetic nanoparticles. arXiv:1909.02470v1 [cond-mat.mes-hall] 5 Sep 2019 2/16 10/16 16/16

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Section: /16mentioning

confidence: 99%

The role of faceting and elongation on the magnetic anisotropy of magnetite Fe3O4 nanocrystals

Moreno

Poyser

Meilak

et al. 2020

Sci Rep

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“…Among these, magnetic iron oxide nanoparticles emerged not only for their good adsorption properties, but also for the possibility of easy removal from aqueous systems [3]. Iron oxide magnetic nanoparticles (MNPs), indeed, were shown to have large surface areas with many active sites for adsorption of metal ions, good selectivity and low toxicity [4][5][6][7]. However, due to their hydrophobic surfaces, aggregation occurs in aqueous media, which lowers the efficiency of adsorption [8].…”

Section: Introductionmentioning

confidence: 99%

Silica-Coated Magnetic Nanocomposites for Pb2+ Removal from Aqueous Solution

et al. 2020

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Magnetic iron oxide-silica shell nanocomposites with different iron oxide/silica ratio were synthesized and structurally characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), small-angle neutron scattering, magnetic and N 2 -sorption studies. The composite that resulted with the best properties in terms of contact surface area and saturation of magnetization was selected for Pb 2+ adsorption studies from aqueous media. The material presented good absorption capacity (maximum adsorption capacity 14.9 mg·g −1 ) comparable with similar materials presented in literature. Its chemico-physical stability and adsorption capacity recommend the nanocomposite as a cheap adsorbent material for lead.

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“…Besides, the morphology of nanomedicines influences their fate in vivo, which the anisotropic nanostructures have been proved to exhibit longer blood circulation time and higher retention in tumor sites 22,23 . Basically, the morphology and size of MIONs can be controlled by modulating the synthetic parameters (eg, iron precursors, surfactants, solvent, pH value, dopants, reaction temperature, and duration) 15,24,25 . Figure 1 shows several representative MIONs that have been reported in recent years.…”

Section: Magnetic Iron Oxide Nanomaterialsmentioning

confidence: 99%

Magnetic iron oxide nanomaterials: A key player in cancer nanomedicine

Liang

Zhang

Cheng

et al. 2020

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Magnetic iron oxide nanomaterials are among the most widely studied candidates for cancer nanomedicine, because of not only their great biocompatibility and abundance of raw materials, but also their diverse physicochemical properties and biological effects. Represented by magnetite and maghemite, various iron oxide‐based magnetic nanomaterials have been developed for cancer diagnosis and treatment. This mini review presents an up‐to‐date overview of magnetic iron oxide‐based cancer nanomedicines with an emphasis on bioimaging and therapy.

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Design strategies for shape-controlled magnetic iron oxide nanoparticles

Abstract: strategies for shape-controlled magnetic iron oxide nanoparticles.

Cited by 239 publications

References 357 publications

The role of faceting and elongation on the magnetic anisotropy of magnetite Fe3O4 nanocrystals

The role of faceting and elongation on the magnetic anisotropy of magnetite Fe3O4 nanocrystals

Silica-Coated Magnetic Nanocomposites for Pb2+ Removal from Aqueous Solution

Magnetic iron oxide nanomaterials: A key player in cancer nanomedicine

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