Electrochemical synthesis and magnetism of magnetic nanotubes

Proença, Mariana P.; Silva, Célia Regina Sousa da; Ventura, J.; Araújo, João P.

doi:10.1016/b978-0-08-100164-6.00024-2

Cited by 10 publications

(7 citation statements)

References 283 publications

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“…This behaviour may arise from the higher dipolar interactions exhibited between the Ni segments along the wire length than with Ni segments of neighbouring wires. In addition, for samples with L Ni 30 nm, the L Cu was found to be around 25 nm and so the dipolar interactions between Ni segments of the same wire prevail, tilting the easy magnetization axis along the parallel direction [35,36]. In order to better compare the dipolar interactions and antiferromagnetic coupling exhibited between the Ni segments along the wire length with those exhibited between the Ni segments of neighboring wires, micromagnetic simulations of selected arrays were performed using OOMMF.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Tuning the magnetic properties of multisegmented Ni/Cu electrodeposited nanowires with controllable Ni lengths

et al. 2016

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The fabrication of segmented Ni/Cu nanowires (NWs), with tunable structural and magnetic properties, is reported. A potentiostatic electrodeposition method with a single electrolytic bath has been used to fabricate multisegmented Ni/Cu NWs inside a highly hexagonally ordered anodic nanoporous alumina membrane, with diameters of 50 nm and Ni segment lengths (L Ni) tuned from 10 nm up to 140 nm. The x-ray diffraction results evidenced a strong dependence of the Ni NWs crystallographic face-centered-cubic (fcc) texture along the [220] direction on the aspect ratio of the NWs. The magnetic behavior of the multisegmented Ni/Cu NW arrays, as a function of the magnetic field and temperature, is also studied and correlated with their structural and morphological properties. Micromagnetic simulations, together with the experimental results, showed a dominant antiferromagnetic coupling between Ni segments along the wire length for small low aspect-ratio magnetic segments. When increasing the Ni segments' length, the magnetic interactions between these along the wire became stronger, favouring a ferromagnetic coupling. The Curie temperature of the NWs was also found to strongly depend on the Ni magnetic segment length. Particularly the Curie temperature was found to be reduced 75 K for the 20 nm Ni segments, following the finite-size scaling relation with ξ 0 = 8.1 Å and γ = 0.48. These results emphasize the advantages of using a template assisted method to electrodeposit multilayer NWs, as it allows an easy tailor of the respective morphological, chemical, structural and magnetic properties.

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Section: Magnetic Propertiesmentioning

confidence: 99%

Tuning the magnetic properties of multisegmented Ni/Cu electrodeposited nanowires with controllable Ni lengths

et al. 2016

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“…[4][5][6][7] In practical use, tubural structures can successfully replace not only NWs, but also nanoparticles, in such fields like catalysis, sensory, and bio applications, because of the significant increased surface area. [8][9][10][11][12][13] The actively used method for producing metallic NTs is a template synthesis. It consists in the use of porous matrices, where 1D NSs form by chemical method.…”

Section: Introductionmentioning

confidence: 99%

Structural and Magnetic Characteristics of Ferrum Nanotubes Obtained at Different Potentials of Electrodeposition

Канюков

Shumskaya²,

Kozlovskiy

et al. 2019

Physica Status Solidi (b)

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Fe nanotubes (NTs) are successfully fabricated into the pores of polyethylene terephthalate (PET) ion‐track membranes by potentiostatic electrochemical deposition technique at different voltages. Morphological peculiarities and main structural parameters at different deposition modes are analyzed. NTs have a body‐centered cubic (BCC) lattice with spatial singony Im‐3m(229) typical for the iron phase and selected crystalline direction [110] along the main axis of the 1D nanostructure (NS). The possibility of changing the NT wall thickness by changing the deposition potential is shown. Micro‐ and macromagnetic characteristics of Fe NTs are analyzed and their relationship with morphological and structural features is discussed. The inner diameter, structural and magnetic characteristics of NSs may be simply modulated by controlling the deposition conditions. The results provide a useful method for fabricating low‐cost and a simply scalable route for the design of both separate 1D hollow metal NSs and 2D anisotropic ferromagnetic structural materials on the base of flexible polymer film, which are important for applications in modern nanoelectronics.

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“…For example, nanotubes made of magnetic material have no magnetic core, it makes possible to create nanostructures with homogeneous switching fields, which guarantee results reproducibility [17]; a lower specific gravity makes it possible to float in liquids (including biological fluids) and makes them suitable for using in biotechnology for targeted drugs delivery [18]; a larger specific surface area provides better nanotubes characteristics for catalytic applications [19].…”

Section: Introductionmentioning

confidence: 99%

SRIM Simulation of Carbon Ions Interaction with Ni Nanotubes

Канюков¹,

Kutuzau²,

Bundyukova³

et al. 2019

Materials Today: Proceedings

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By template synthesis method nickel nanotubes with diameter of 400 nm and length of 12 μm were produced in the pores of PET template. The nanotubes were modified by irradiation with carbon ions with energy of 28 MeV and a dose of 5 × 10 11 cm -2 . To ensure the maximum efficiency of nanostructures modification process, energy of irradiation was decided by using of SRIM software.Based on SRIM simulation of carbon ions interaction with Ni nanotubes, the areas on which effect of high energy ions will maximum were predicted. A comparative analysis of nanostructures before and after irradiation was carried out by scanning electron microscopy. The maximum change in nanotubes morphology, in the form of destruction of walls, was appeared at a distance of about 10 μm from the start point of C 3+ ions track inside the nanotubes. A substantiation of reason of wall degradation in this area was proposed.

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Electrochemical synthesis and magnetism of magnetic nanotubes

Cited by 10 publications

References 283 publications

Tuning the magnetic properties of multisegmented Ni/Cu electrodeposited nanowires with controllable Ni lengths

Tuning the magnetic properties of multisegmented Ni/Cu electrodeposited nanowires with controllable Ni lengths

Structural and Magnetic Characteristics of Ferrum Nanotubes Obtained at Different Potentials of Electrodeposition

SRIM Simulation of Carbon Ions Interaction with Ni Nanotubes

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