MCC: Specific of preparation, correlation of the phase composition and electrodynamic properties

Klygach, D.S.; Vakhitov, M.G.; Pankratov, D. А.; Жеребцов, Д. А.; Tolstoguzov, D. S.; Raddaoui, Z.; Kossi, S. El; Dhahri, J.; Винник, Д.А.; Труханов, А.В.

doi:10.1016/j.jmmm.2020.167694

Cited by 11 publications

(5 citation statements)

References 56 publications

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“…The composition and morphological properties of MNPs were studied by Mössbauer spectroscopy, and related spectra, along with their description and results of simulation in different state superparamagnetic relaxation models are presented in Table 1 and Supplementary materials (Figure S1, Table S1) . Relying on the presented results, it can be argued that magnitudes of magnetic splittings, obtained even for spectra at low temperatures, are lower than expected for massive samples of magnetite and maghemite [ 81 ], which is typical for nanosized materials [ 82 ]. Indeed, the sizes of magnetic domains can be estimated in the range from 12.6 (for Fe 3 O 4 -HA) to 15.7 (for Fe 3 O 4 -APTES) nm as reported in Table 1 .…”

Section: Resultsmentioning

confidence: 71%

Functionalized Magnetite Nanoparticles: Characterization, Bioeffects, and Role of Reactive Oxygen Species in Unicellular and Enzymatic Systems

Kicheeva

Sushko

Bondarenko

et al. 2023

IJMS

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The current study evaluates the role of reactive oxygen species (ROS) in bioeffects of magnetite nanoparticles (MNPs), such as bare (Fe3O4), humic acids (Fe3O4-HA), and 3-aminopropyltriethoxysilane (Fe3O4-APTES) modified MNPs. Mössbauer spectroscopy was used to identify the local surrounding for Fe atom/ions and the depth of modification for MNPs. It was found that the Fe3O4-HA MNPs contain the smallest, whereas the Fe3O4-APTES MNPs contain the largest amount of Fe2+ ions. Bioluminescent cellular and enzymatic assays were applied to monitor the toxicity and anti-(pro-)oxidant activity of MNPs. The contents of ROS were determined by a chemiluminescence luminol assay evaluating the correlations with toxicity/anti-(pro-)oxidant coefficients. Toxic effects of modified MNPs were found at higher concentrations (>10−2 g/L); they were related to ROS storage in bacterial suspensions. MNPs stimulated ROS production by the bacteria in a wide concentration range (10−15–1 g/L). Under the conditions of model oxidative stress and higher concentrations of MNPs (>10−4 g/L), the bacterial bioassay revealed prooxidant activity of all three MNP types, with corresponding decay of ROS content. Bioluminescence enzymatic assay did not show any sensitivity to MNPs, with negligible change in ROS content. The results clearly indicate that cell-membrane processes are responsible for the bioeffects and bacterial ROS generation, confirming the ferroptosis phenomenon based on iron-initiated cell-membrane lipid peroxidation.

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Section: Resultsmentioning

confidence: 71%

Functionalized Magnetite Nanoparticles: Characterization, Bioeffects, and Role of Reactive Oxygen Species in Unicellular and Enzymatic Systems

Kicheeva

Sushko

Bondarenko

et al. 2023

IJMS

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“…This behavior is consistent with superparamagnetic materials. 59,60 A distinct response is observed for the Fe 3 O 4 –AA–MOF sample. With decreasing temperature, both the sextet and the paramagnetic doublet show increased absorption intensity (Fig.…”

Section: Resultsmentioning

confidence: 94%

“…The methodology was adapted from previously established methods described by various authors. 31,44–67…”

Section: Methodsmentioning

confidence: 99%

Fenton reaction-driven pro-oxidant synergy of ascorbic acid and iron oxide nanoparticles in MIL-88B(Fe)

Bondarenko,

Baimuratova,

Dzeranov

et al. 2024

New J. Chem.

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“…the imaginary part μ // of the permeability. Diamagnetic In 3+ indium cations have zero moment and their contribution in magnetic resonance and the imaginary part μ // of the permeability will decrease with increasing substitution 62 .…”

Section: Resultsmentioning

confidence: 99%

Features of structure, magnetic state and electrodynamic performance of SrFe12−xInxO19

Турченко

Труханов

Костишин

et al. 2021

Sci Rep

115

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Indium-substituted strontium hexaferrites were prepared by the conventional solid-phase reaction method. Neutron diffraction patterns were obtained at room temperature and analyzed using the Rietveld methods. A linear dependence of the unit cell parameters is found. In3+ cations are located mainly in octahedral positions of 4fVI and 12 k. The average crystallite size varies within 0.84–0.65 μm. With increasing substitution, the TC Curie temperature decreases monotonically down to ~ 520 K. ZFC and FC measurements showed a frustrated state. Upon substitution, the average and maximum sizes of ferrimagnetic clusters change in the opposite direction. The Mr remanent magnetization decreases down to ~ 20.2 emu/g at room temperature. The Ms spontaneous magnetization and the keff effective magnetocrystalline anisotropy constant are determined. With increasing substitution, the maximum of the ε/ real part of permittivity decreases in magnitude from ~ 3.3 to ~ 1.9 and shifts towards low frequencies from ~ 45.5 GHz to ~ 37.4 GHz. The maximum of the tg(α) dielectric loss tangent decreases from ~ 1.0 to ~ 0.7 and shifts towards low frequencies from ~ 40.6 GHz to ~ 37.3 GHz. The low-frequency maximum of the μ/ real part of permeability decreases from ~ 1.8 to ~ 0.9 and slightly shifts towards high frequencies up to ~ 34.7 GHz. The maximum of the tg(δ) magnetic loss tangent decreases from ~ 0.7 to ~ 0.5 and shifts slightly towards low frequencies from ~ 40.5 GHz to ~ 37.7 GHz. The discussion of microwave properties is based on the saturation magnetization, natural ferromagnetic resonance and dielectric polarization types.

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MCC: Specific of preparation, correlation of the phase composition and electrodynamic properties

Cited by 11 publications

References 56 publications

Functionalized Magnetite Nanoparticles: Characterization, Bioeffects, and Role of Reactive Oxygen Species in Unicellular and Enzymatic Systems

Functionalized Magnetite Nanoparticles: Characterization, Bioeffects, and Role of Reactive Oxygen Species in Unicellular and Enzymatic Systems

Fenton reaction-driven pro-oxidant synergy of ascorbic acid and iron oxide nanoparticles in MIL-88B(Fe)

Features of structure, magnetic state and electrodynamic performance of SrFe12−xInxO19

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