Preparation and thermal stability of nickel nanowires via self-assembly process under magnetic field

Wang, Hu; Li, Ming; Li, Xiaoyu; Xie, Ke; Liao, Li

doi:10.1007/s12034-015-1012-y

Cited by 11 publications

(7 citation statements)

References 16 publications

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“…The M r and H c values are 10.8 emu g −1 and 163 Oe at 300 K, respectively (Table ). These values are consistent with the NNCs reduced by hydrazine, showing that our system is a good alternative to these strong reducing systems. These values are also in the same order of magnitude as the magnetic properties of the electro‐deposed nickel nanowires …”

Section: Resultssupporting

confidence: 87%

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Fabrication of Nickel NanoChains/PVDF Nanocomposites and Their Electrical/Magnetic Properties

Martin

Dantras

Lonjon

et al. 2019

Physica Status Solidi (a)

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Magnetic nickel nanoparticles (NPs) and nanochains (NNCs) are grown in a polyol medium under a static field as an alternative to template electrodeposition and strong reducers. Scanning electron microscopy (SEM) images and their statistical analysis show an important aspect ratio of 75 for NNCs. These NNCs present enhanced magnetic properties in terms of coercive field (H C ¼ 163 Oe) and saturation magnetization (M S ¼ 10.8 emu g À1 ). Nanocomposites of NNCs/PVDF are fabricated with 2 %vol. NNCs and present better properties than NPs/PVDF with higher filler content. The longitudinal and transverse magnetic properties of the composite are measured showing that higher properties are recorded in the longitudinal direction. Electrical conductivity of composite is plotted as a function of NNCs volume content to determine the electrical percolation threshold. The corresponding value of the apparent aspect ratio (ξ ¼ 70) confirms that the processing of composite does not modify the particles morphology. Thus, it explains the enhancement of the magnetic properties due to the NNCs anisotropy.

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Section: Resultssupporting

confidence: 87%

“…Modified polyol routes have led to many particles shapes such as dumbbells, rods, fibers, and wires . Nickel nanochains (NNCs) growth has also been reported by using hydrazine as strong reducing agent in polyol under high magnetic field without any chemical surfactant. The as‐prepared particles show an important aspect ratio.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Nickel NanoChains/PVDF Nanocomposites and Their Electrical/Magnetic Properties

Martin

Dantras

Lonjon

et al. 2019

Physica Status Solidi (a)

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“…The direct synthesis method includes solid-state, vapour-phase and liquid-/solution-based technique [1]. The solid-state and vapour-phase techniques are commonly costly and require complicated equipment [17,18]. The liquid-/solution-based synthesis technique, also known as a wet chemical process, is a prospective method in terms of applications with relatively low cost, simple equipment and high yield [1,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Enhanced magnetic performance of aligned wires assembled from nanoparticles: from nanoscale to macroscale

Kartikowati

Iwaki

et al. 2020

R. Soc. open sci.

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Magnetic wires in highly dense arrays, possessing unique magnetic properties, are eagerly anticipated for inexpensive and scalable fabrication technologies. This study reports a facile method to fabricate arrays of magnetic wires directly assembled from well-dispersed α ″ -Fe 16 N 2 /Al 2 O 3 and Fe 3 O 4 nanoparticles with average diameters of 45 nm and 65 nm, respectively. The magnetic arrays with a height scale of the order of 10 mm were formed on substrate surfaces, which were perpendicular to an applied magnetic field of 15 T. The applied magnetic field aligned the easy axis of the magnetic nanoparticles (MNPs) and resulted in a significant enhancement of the magnetic performance. Hysteresis curves reveal that values of magnetic coercivity and remanent magnetization in the preferred magnetization direction are both higher than that of the nanoparticles, while these values in the perpendicular direction are both lower. Enhancement in the magnetic property for arrays made from spindle-shape α ″ -Fe 16 N 2 /Al 2 O 3 nanoparticles is higher than that made from cube-like α ″ -Fe 16 N 2 /Al 2 O 3 ones, owing to the shape anisotropy of MNPs. Furthermore, the assembled highly magnetic α ″ -Fe 16 N 2 /Al 2 O 3 arrays produced a detectable magnetic field with an intensity of approximately 0.2 T. Although high-intensity external field benefits for the fabrication of magnetic arrays, the newly developed technique provides an environmentally friendly and feasible approach to fabricate magnetic wires in highly dense arrays in open environment condition.

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“…Ni nanoparticles and nanowires have been formulated with different techniques, such as hydrothermal processing [10,31,32], chemical reduction [33,34,35], and electrochemical deposition [36]. However, the methods to fabricate, deposit, and/or align the nanowires onto desired substrates typically requires multiple steps, large quantities of electrically or functionally inactive materials (templates), and extreme conditions.…”

Section: Introductionmentioning

confidence: 99%

“…However, the methods to fabricate, deposit, and/or align the nanowires onto desired substrates typically requires multiple steps, large quantities of electrically or functionally inactive materials (templates), and extreme conditions. For example, the reduction of Ni to its elemental state can be achieved in a stainless steel autoclave, and must be followed by washing and drying of the nanowires in an inert atmosphere to avoid oxidation [10,31,33,35].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Field Patterning of Nickel Nanowire Film Realized by Printed Precursor Inks

et al. 2019

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This paper demonstrates an easily prepared novel material and approach to producing aligned nickel (Ni) nanowires having unique and customizable structures on a variety of substrates for electronic and magnetic applications. This is a new approach to producing printed metallic Ni structures from precursor materials, and it provides a novel technique for nanowire formation during reduction. This homogeneous solution can be printed in ambient conditions, and it forms aligned elemental Ni nanowires over large areas upon heating in the presence of a magnetic field. The use of templates or subsequent purification are not required. This technique is very flexible, and allows the preparation of unique patterns of nanowires which provides opportunities to produce structures with enhanced anisotropic electrical and magnetic properties. An example of this is the unique fabrication of aligned nanowire grids by overlaying layers of nanowires oriented at different angles with respect to each other. The resistivity of printed and cured films was found to be as low as 560 µΩ∙cm. The saturation magnetization was measured to be 30 emu∙g−1, which is comparable to bulk Ni. Magnetic anisotropy was induced with an axis along the direction of the applied magnetic field, giving soft magnetic properties.

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Preparation and thermal stability of nickel nanowires via self-assembly process under magnetic field

Cited by 11 publications

References 16 publications

Fabrication of Nickel NanoChains/PVDF Nanocomposites and Their Electrical/Magnetic Properties

Fabrication of Nickel NanoChains/PVDF Nanocomposites and Their Electrical/Magnetic Properties

Enhanced magnetic performance of aligned wires assembled from nanoparticles: from nanoscale to macroscale

Magnetic Field Patterning of Nickel Nanowire Film Realized by Printed Precursor Inks

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