Magnetic and structural properties of Fe–Co nanowires fabricated by matrix synthesis in the pores of track membranes

Фролов, К. В.; Загорский, Д. Л.; Lyubutin, I. S.; Чуев, М. А.; Перунов, И. В.; Bedin, S. A.; Lomov, A. A.; Артемов, В. В.; Sulyanov, S. N.

doi:10.1134/s0021364017050083

Cited by 25 publications

(9 citation statements)

References 19 publications

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“…The theoretical processing of the magnetization curve was carried out within the generalized Stoner-Wohlfarth relaxation model [43][44][45][46]. It was assumed that each magnetic particle is uniformly magnetized with magnetization M 0 , and the magnetic anisotropy has an axial form and its energy is described by the parameter KV, where K is the constant of magnetic anisotropy, and V is the average volume of the magnetic particle.…”

Section: Magnetometrymentioning

confidence: 99%

“…where ∆H ∆t is the rate of change in the external magnetic field during the experiment, M is the instantaneous magnetization of the particle, b is the mean field parameter responsible for the interaction of nanoparticles. A detailed formalism of the model describing all the calculated parameters is presented in [43][44][45][46] and is beyond the scope of this article. Despite its simplicity, the model makes it possible to qualitatively and quantitatively describe the experimental magnetization curves without resorting to excessive parameterization of the problem, for example, introducing a more complex type of anisotropy [43][44][45][46].…”

Section: Magnetometrymentioning

confidence: 99%

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Permeability of the Composite Magnetic Microcapsules Triggered by a Non-Heating Low-Frequency Magnetic Field

et al. 2021

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Nanosystems for targeted delivery and remote-controlled release of therapeutic agents has become a top priority in pharmaceutical science and drug development in recent decades. Application of a low frequency magnetic field (LFMF) as an external stimulus opens up opportunities to trigger release of the encapsulated bioactive substances with high locality and penetration ability without heating of biological tissue in vivo. Therefore, the development of novel microencapsulated drug formulations sensitive to LFMF is of paramount importance. Here, we report the result of LFMF-triggered release of the fluorescently labeled dextran from polyelectrolyte microcapsules modified with magnetic iron oxide nanoparticles. Polyelectrolyte microcapsules were obtained by a method of sequential deposition of oppositely charged poly(allylamine hydrochloride) (PAH) and poly(sodium 4-styrenesulfonate) (PSS) on the surface of colloidal vaterite particles. The synthesized single domain maghemite nanoparticles integrated into the polymer multilayers serve as magneto-mechanical actuators. We report the first systematic study of the effect of magnetic field with different frequencies on the permeability of the microcapsules. The in situ measurements of the optical density curves upon the 100 mT LFMF treatment were carried out for a range of frequencies from 30 to 150 Hz. Such fields do not cause any considerable heating of the magnetic nanoparticles but promote their rotating-oscillating mechanical motion that produces mechanical forces and deformations of the adjacent materials. We observed the changes in release of the encapsulated TRITC-dextran molecules from the PAH/PSS microcapsules upon application of the 50 Hz alternating magnetic field. The obtained results open new horizons for the design of polymer systems for triggered drug release without dangerous heating and overheating of tissues.

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Section: Magnetometrymentioning

confidence: 99%

Section: Magnetometrymentioning

confidence: 99%

Permeability of the Composite Magnetic Microcapsules Triggered by a Non-Heating Low-Frequency Magnetic Field

et al. 2021

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“…One of the important problems of modern materials science is the production of nanomaterials, which includes both scientific and technological aspects. The way of production influences the structural and magnetic properties of synthesized nanomaterials [10][11][12]. The magnetic properties of nanostructures are different from the properties of bulk materials, while reducing the average size of nanostructures comparable to the width of the magnetic domain is of greatest interest for potential practical applications.…”

Section: Introductionmentioning

confidence: 99%

STRUCTURAL AND MAGNETIC STUDIES OF FE100-x COx NANOTUBES OBTAINED BY TEMPLATE METHOD

Kadyrzhanov¹,

Русаков²,

Kozlovskiy³

et al. 2018

PIER C

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Hollow nanostructures based on the Fe 100−x Co x alloy were synthesized in the pores of polymer template matrices based on PET using the electrochemical deposition method. Morphology, elemental composition, and structural features were characterized by scanning electron microscopy, energy dispersive analysis, and X-ray diffractometry. The study of the internal magnetic texture was carried out using Mossbauer spectroscopy. The dependence of the change in structural and magnetic properties from the atomic content of components in nanotube structure is revealed. It is established that the synthesized nanostructures are hollow Fe 100−x Co x nanotubes with a body-centered cubic crystal structure. The decrease in the unit cell parameter with increasing cobalt concentration is due to the difference in the radii of Fe (1.227Å) and Co (1.191Å) atoms. It is established that a random distribution of magnetic moments directions of Fe atoms is observed for Fe 100 Co 0 nanotubes. And magnetic texture along the nanotube axis is observed for Fe 100−x Co x nanotubes, with an increase in Co atoms concentration. The average angle between the direction of the magnetic moment of iron atoms and the nanotube axis decreases from ϑ = 54.6 • to ϑ = 24.5 • .

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“…In turn, one of the unique materials for practical use is an alloy of iron and nickel. NiFe nanostructures have unique physicochemical properties when the conditions of synthesis or chemical composition change, and it allows them to be one of the universal materials with a wide potential application [11][12][13][14][15]. Targeted delivery of drugs via the magnetic nanostructures takes a special place among the variety of practical applications of nanostructures.…”

Section: Introductionmentioning

confidence: 99%

“…Targeted delivery of drugs via the magnetic nanostructures takes a special place among the variety of practical applications of nanostructures. Groups of researchers discuss the type of nanostructures with optimal characteristics for use as containers for medicines [15][16][17][18]. Nanowires and nanotubes with their elongated shape and anisotropy of magnetic properties allow us to overcome the limitations of nanoparticles [19,20].…”

Section: Introductionmentioning

confidence: 99%

Study of Degradation Processes of Feni Nanostructures

Al¹,

Korolkov²,

Dv³

et al. 2017

J Nanomed Nanotechnol

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Magnetic and structural properties of Fe–Co nanowires fabricated by matrix synthesis in the pores of track membranes

Cited by 25 publications

References 19 publications

Permeability of the Composite Magnetic Microcapsules Triggered by a Non-Heating Low-Frequency Magnetic Field

Permeability of the Composite Magnetic Microcapsules Triggered by a Non-Heating Low-Frequency Magnetic Field

STRUCTURAL AND MAGNETIC STUDIES OF FE100-x COx NANOTUBES OBTAINED BY TEMPLATE METHOD

Study of Degradation Processes of Feni Nanostructures

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