Structural and magnetic properties of Ni-Fe nanowires in the pores of polymer track membranes

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

doi:10.1016/j.jmmm.2019.165415

Cited by 22 publications

(10 citation statements)

References 32 publications

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“…Electrospinning (Li et al, 2003;Graeser et al, 2007;Wu et al, 2007) and electrodeposition using an aluminum oxide or other template (Salem et al, 2012;Zhang et al, 2013;Meneses et al, 2018;Frolov et al, 2019) are two common methods to make ferromagnetic metallic nanofibers of materials that include Ni (Wu et al, 2007;Meneses et al, 2018), Fe (Graeser et al, 2007;Wu et al, 2007), Co (Graeser et al, 2007;Wu et al, 2007), and Ni 1-x Fe x (Salem et al, 2012;Zhang et al, 2013;Frolov et al, 2019). Electrospinning has the advantage, that it is, a relatively simpler preparation method and it is possible to fabricate larger nanofibre mats.…”

Section: Introductionmentioning

confidence: 99%

Electrospun, Oriented, Ferromagnetic Ni1-xFex Nanofibers

et al. 2020

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Electrospinning has been used to fabricate ferromagnetic Ni 0. 47Fe 0.53 nanofiber mats that were composed of individual, orientated Ni 0.47 Fe 0.53 nanofibers. The key steps were processing a polyvinylpyrrolidone nanofiber template containing ferric nitrate and nickel acetate metal precursors in Ar at 300 • C and then 95% Ar: 5% H 2 at 600 • C. The Ni 0.47 Fe 0.53 fibers were nanostructured and contained Ni 0.47 Fe 0.53 nanocrystals with average diameters of ∼14 nm. The Ni 0.47 Fe 0.53 ferromagnetic mats had a high saturation magnetic moment per formula unit that was comparable to those reported in other studies of nanostructured Ni 1-x Fe x. There is a small spin-disordered fraction that is typically seen in nanoscale ferromagnets and is likely to be caused by the surface of the nanofibers. There was an additional magnetic contribution that could possibly stem from a small Fe 1-z Ni z O phase fraction surrounding the fibers. The coercivity was found to be enhanced when compared with the bulk material.

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Section: Introductionmentioning

confidence: 99%

Electrospun, Oriented, Ferromagnetic Ni1-xFex Nanofibers

et al. 2020

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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%

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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“…[ 123,37 ] Likewise, polyethylene terephthalate has been used as a template for the synthesis of Ni‐Fe nanowires. [ 124 ] Anodic aluminum oxide (AAO) templates have attracted attention because of their low‐cost, excellent insulativity, and chemical stability. The AAO templates have been used to fabricate, [ 125,126 ] Fe‐Au, [ 127 ] and Co [ 128 ] nanowires through template‐assisted electrodeposition.…”

Section: Methods Of Synthesismentioning

confidence: 99%

Nonspherical Metal‐Based Nanoarchitectures: Synthesis and Impact of Size, Shape, and Composition on Their Biological Activity

Zare

Zheng

Makvandi

et al. 2021

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Metal‐based nanoentities, apart from being indispensable research tools, have found extensive use in the industrial and biomedical arena. Because their biological impacts are governed by factors such as size, shape, and composition, such issues must be taken into account when these materials are incorporated into multi‐component ensembles for clinical applications. The size and shape (rods, wires, sheets, tubes, and cages) of metallic nanostructures influence cell viability by virtue of their varied geometry and physicochemical interactions with mammalian cell membranes. The anisotropic properties of nonspherical metal‐based nanoarchitectures render them exciting candidates for biomedical applications. Here, the size‐, shape‐, and composition‐dependent properties of nonspherical metal‐based nanoarchitectures are reviewed in the context of their potential applications in cancer diagnostics and therapeutics, as well as, in regenerative medicine. Strategies for the synthesis of nonspherical metal‐based nanoarchitectures and their cytotoxicity and immunological profiles are also comprehensively appraised.

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Structural and magnetic properties of Ni-Fe nanowires in the pores of polymer track membranes

Cited by 22 publications

References 32 publications

Electrospun, Oriented, Ferromagnetic Ni1-xFex Nanofibers

Electrospun, Oriented, Ferromagnetic Ni1-xFex Nanofibers

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

Nonspherical Metal‐Based Nanoarchitectures: Synthesis and Impact of Size, Shape, and Composition on Their Biological Activity

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