Готові списки джерел за темами / Ni Nanowire

Добірка наукової літератури з теми "Ni Nanowire"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Ni Nanowire"

1

Rai, Rajesh K., and Chandan Srivastava. "Nonequilibrium Microstructures for Ag–Ni Nanowires." Microscopy and Microanalysis 21, no. 2 (February 6, 2015): 491–97. http://dx.doi.org/10.1017/s1431927615000069.

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Анотація:
AbstractThis work illustrates that a variety of nanowire microstructures can be obtained either by controlling the nanowire formation kinetics or by suitable thermal processing of as-deposited nanowires with nonequilibrium metastable microstructure. In the present work, 200-nm diameter Ag–Ni nanowires with similar compositions, but with significantly different microstructures, were electrodeposited. A 15 mA deposition current produced nanowires in which Ag-rich crystalline nanoparticles were embedded in a Ni-rich amorphous matrix. A 3 mA deposition current produced nanowires in which an Ag-rich crystalline phase formed a backbone-like configuration in the axial region of the nanowire, whereas the peripheral region contained Ni-rich nanocrystalline and amorphous phases. Isothermal annealing of the nanowires illustrated a phase evolution pathway that was extremely sensitive to the initial nanowire microstructure.
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2

Kim, Joondong, Jong-Uk Bae, Wayne A. Anderson, Hyun-Mi Kim, and Ki-Bum Kim. "Solid-state growth of nickel silicide nanowire by the metal-induced growth method." Journal of Materials Research 21, no. 11 (November 2006): 2936–40. http://dx.doi.org/10.1557/jmr.2006.0364.

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Анотація:
Unique nanowire growth was accomplished at 575 °C by the metal-induced growth (MIG) method. This involved a spontaneous reaction between metal and Si. The deposited metal worked as a catalyst layer to grow nanowires in the solid state. Various metals (Ni, Co, and Pd) were used in MIG nanowire fabrication, and the Ni-induced case was successful in demonstrating that metal species should be the dominant factor for growing nanowires. The Ni to Si composition was studied by energy dispersive spectroscopy showing the Ni diffusion inside the nanowire as well as the Ni silicide layer. The practical application of the MIG nanowire was proved by fabricating nanoscale contacts.
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3

He, Li Zhong, Li Rong Qin, Jian Wei Zhao, Yu Yang, and Ying Ying Yin. "Preparation of Pt/Ni Multilayer Nanowires with Enhanced Magnetic Property and Electrocatalytic Activity." Journal of Nano Research 40 (March 2016): 20–28. http://dx.doi.org/10.4028/www.scientific.net/jnanor.40.20.

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Анотація:
Pt/Ni multilayer nanowire arrays were successfully fabricated inside the nanochannels of anodic aluminum oxide template by pulse electrodeposition method. The morphologies of the Pt/Ni nanowires were analyzed, which revealed that these nanowires had smooth surface and uniform diameter of about 70 nm. The ferromagnetic Ni layers were separated periodically by Pt layers along the axis of the nanowires. Magnetization measurements on the Pt/Ni nanowire arrays revealed a stronger magnetic anisotropy with the easy axis parallel to the nanowires. Following electrochemical performance tests indicated that the Pt/Ni multilayer nanowires comprising Pt and Ni layers showed enhanced electrocatalytic activity for methanol oxidation, as compared with pure Pt nanowires.
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4

Zuo, Yan, Juan Tang, Xiao Tian Li, Yan Zhao, Hai Lan Gong, and Shi Lun Qiu. "Electrodeposition of Ni and Ni-Cu Nanowires in Rectified Porous Anodic Alumina Membrane." Materials Science Forum 663-665 (November 2010): 1121–24. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.1121.

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Анотація:
Highly ordered Ni and Ni-Cu nanowires were electrodeposited into the micropores of the porous anodic alumina (PAA) template which was fabricated by the method of two-step anodizing and the thickness of barrier layer which was formed during the anodizing process was rectified by applying current limited anodization steps. The X-ray diffration (XRD) was used to characterize the Ni and Ni-Cu nanowires and the morphology of these nanowires was examined by the way of scanning electron microscopy (SEM). The SQUID magnetometry was used to investigate the magetic properties of the nanowires. It is found that the coercivity and remanence ratio of Ni-Cu nanowire is larger than that of Ni nanowire.
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5

Lee, Sun Sook, Hyun Jin Kim, Taek-Mo Chung, Young Kuk Lee, Chang Gyoun Kim, and Ki-Seok An. "Fabrication of Nanocomposite Based on ZnO Nanowire." Journal of Nanoscience and Nanotechnology 8, no. 9 (September 1, 2008): 4895–98. http://dx.doi.org/10.1166/jnn.2008.ic80.

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Анотація:
ZnO-NiO core–shell nanowires and Ni-ZnO nanoparticle–nanowire composites have been synthesized by atomic layer deposition (ALD) and H2 thermal reduction, respectively. Grown ZnO nanowires on Si substrates by vapor transport method were used as templates for the growth of NiO layers. In order to prevent interfacial interaction between deposited NiO and ZnO nanowires templates by the reaction at low temperature and to precisely control the thickness of NiO layer, ALD technique was suitably employed to form the ZnO-NiO core–shell nanowires. All surface area of ZnO nanowires was completely and uniformly covered by amorphous NiO layers at low temperature of 130 °C. The Ni-ZnO nanoparticle–nanowire composites were achieved by the thermal reduction of the ZnO-NiO core–shell nanowires at H2 atmosphere. The density of Ni nanoparticles on ZnO nanowires was roughly related to the pre-deposited NiO thickness and the inter-diffusion of Ni into the ZnO nanowire was not observed.
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6

Azmy, Ilham, and Jun Wang. "Construction of Hierarchical CuCo2O4-Ni(OH)2 Core-Shell Nanowire Arrays for High-Performance Pseudocapacitors." Aceh International Journal of Science and Technology 11, no. 1 (April 30, 2022): 85–95. http://dx.doi.org/10.13170/aijst.11.1.24181.

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Анотація:
The hierarchical CuCo2O4-Ni(OH)2 core-shell nanowire arrays on Ni foam were fabricated using facile and cost-effective two-step hydrothermal synthesis. The growth of CuCo2O4 nanowires was developed on Ni foam as the apposite basis of the conductive scaffold, and the ultrathin Ni(OH)2 nanowires were subsequently immobilized to form CuCo2O4-Ni(OH)2 core-shell nanowire arrays (NWAs). The prepared materials were further characterized in structural, morphological, and electrochemical properties. The obtained CuCo2O4-Ni(OH)2 pseudocapacitor electrode, incorporated by unique core-shell heterostructures nanowire arrays, exhibited great specific capacitance of 1201.67 F g-1 at 1 mA g-1, which is much higher than pristine CuCo2O4 nanowire of 638.89 F g-1 at 1 mA g-1. Simultaneously, it also has a high power density of 5.56 kW kg-1 at an energy density of 73.33 Wh kg-1 and good long-term cycling performance (~84 capacitance retention after 1000 cycles). The improved morphological and structural properties have substantiated the CuCo2O4-Ni(OH)2 core-shell nanowire arrays properties owing to higher surface active area and richer redox activity for boosting the electrochemical properties.
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7

Pan, H., J. B. Yi, B. H. Liu, S. Thongmee, J. Ding, Yuan Ping Feng, and Jian Yi Lin. "Magnetic Properties of Highly-Ordered Ni, Co and Their Alloy Nanowires in AAO Templates." Solid State Phenomena 111 (April 2006): 123–26. http://dx.doi.org/10.4028/www.scientific.net/ssp.111.123.

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Анотація:
We have fabricated metal/alumina hybrid materials by electrodepositon of metal nanowires into nanopores of anodic aluminum oxide templates. Single crystalline Ni and Co nanowires have been successfully fabricated. Structural characterization (XRD and HRTEM) shows that the single crystalline Ni nanowire has a preferred orientation along (220) direction. The preferred orientation of Co nanowire is along (100). These single crystalline Ni and Co nanowires have exhibited excellent magnetic properties. Their alloy nanowires have exhibited a large shift in hysteresis, probably due to the surface oxidation and exchange bias effect.
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8

Yu, Yanlong, Jinpeng Li, Jun Wang, Xige Wu, Cuiyan Yu, Tao Xu, Bingdong Chang, Hongyu Sun, and Hamidreza Arandiyan. "Orientation Growth and Magnetic Properties of Electrochemical Deposited Nickel Nanowire Arrays." Catalysts 9, no. 2 (February 3, 2019): 152. http://dx.doi.org/10.3390/catal9020152.

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Анотація:
Highly ordered ferromagnetic metal nanowire arrays with preferred growth direction show potential applications in electronic and spintronic devices. In this work, by employing a porous anodic aluminum oxide template-assisted electrodeposition method, we successfully prepared Ni nanowire arrays. Importantly, the growth direction of Ni nanowire arrays can be controlled by varying the current densities. The crystalline and growth orientation of Ni nanowire arrays show effects on magnetic properties. Single-crystallinity Ni nanowires with [110] orientation show the best magnetic properties, including coercivity and squareness, along the parallel direction of the nanowire axis. The current preparation strategy can be used to obtain other nanowire arrays (such as metal, alloy, and semiconductor) with controlled growth direction in confined space, and is therefore of broad interest for different applications.
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9

Podlaha, Elizabeth J., Mohammadsadegh Beheshti, Deyang Li, and Sunggook Park. "Fe-Ni-Co Electrodeposited Nanowires Decorated with Au." ECS Meeting Abstracts MA2022-01, no. 24 (July 7, 2022): 2487. http://dx.doi.org/10.1149/ma2022-01242487mtgabs.

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Анотація:
Alloy nanowires containing Fe, Ni and Co are of interest as electrode materials in miniaturized devices due to their ability to align them under a magnetic field. In order to improve their resistivity while retaining their magnetic behavior, Fe-Ni-Co nanowires were electrodeposited and decorated with Au; single nanowires were then further characterized (Fig. 1). The nanowires were deposition under a constant applied potential within a nanoscale alumina template, followed by dissolution of the membrane, release of the nanowires, and subsequent treatment in a gold acid electrolyte. Au clusters formed on the Fe-Ni-Co surface through simultaneous displacement and corrosion reactions. The morphology, composition and structure was examined before and after modification, revealing a change in crystallinity and composition that impacted the nanowire’s electrical and magnetic properties. Transferring a single nanowire to a lithographically prepared two-point probe enabled the electrical and magnetic characterization of the Au decorated nanowire. Averaging results of quadruplicate replicates, a low coverage of discontinuous Au clusters on Fe-Ni-Co nanowires significantly decreased the resistivity, not attributed entirely to the lower resistivity of Au, but as a consequence of changes of the Fe-Ni-Co crystallinity. A high coverage of the Fe-Ni-Co by Au had no further benefit, and even increased the resistivity. Since bulk gold is diamagnetic and decoration of Au onto the Fe-Ni-Co nanowires may compromise the overall magnetic property, the magnetoresistance and electron mobility were determined. Both decreased, as expected, with coverage of Au clusters on the nanowires, suggesting that there may be an optimal cluster density for modifying the Fe-Ni-Co nanowires. Figure 1. Electrodeposited nanowires initially amorphous then decorated with Au showing a change in crystallinity and subsequent characterization with a two-point probe. Figure 1
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10

Shang, Wei Zheng, Wei Guo Zhang, and Hong Zhi Wang. "Morphological and Magnetic Properties of Electrodeposited Ni-Ag Alloy Nanowire Arrays in Modified AAO Template." Advanced Materials Research 875-877 (February 2014): 14–17. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.14.

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Анотація:
Highly ordered Ni-Ag alloy nanowire arrays have been fabricated successfully by electrodeposition into the pores of anodic aluminum oxide (AAO). This template was prepared with modified two-step anodizing method. The scanning and transmission electron microscopy were utilized to characterize the Ni-Ag alloy nanowire arrays. The results revealed that the nanowire arrays were regularly arranged, about 90nm in diameter and 30µm in length. The nanowires were single crystal and the atomic ratio of Ni and Ag is very close to 79:21. Magnetic hysteresis loop showed that Ni-Ag alloy nanowire arrays embedded in AAO have superparamagnetism, indicating their potential applications in biomedical materials.
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Більше джерел

Дисертації з теми "Ni Nanowire"

1

Saifulin, M. M., A. A. Mashentseva, and M. V. Zdorovets. "Template Synthesis and Composition of Bimetallic Co/Ni Nanostructures Arrays." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35265.

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Анотація:
Nanostructures, based on nickel and cobalt, are promising for the development of magnetic metamaterials. Magnetic nanotubes have become a symbol of new and fast developing research area of nanotechnology. Their potential applications are in many fields, including electronics, catalysis, magnetism and electrochemistry. The template method is commonly used to prepare this kind of materials. The paper describes magnetic nanotubes and nanowires preparation method, based on electrochemical deposition in track etched membranes. Various electrolytes have been used to obtain nanostructures of different cobalt and nickel compositions. We have obtained the ordered arrays of bimetallic cobalt/nickel nanostructures with sizes from 70 to 600 nm. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35265
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2

Silva, Charles da Rocha. "Estudo das interações magnéticas em nanofios de Ni obtidos por eletrodeposição AC." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-29022008-105215/.

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Анотація:
Foram feitos estudos das propriedades magnéticas e estruturais em nanofios de níquel em uma lâmina de alumínio. As amostras foram obtidas através da anodização em duas etapas, seguida de uma eletrodeposição AC. Foi verificado que o aumento do potencial usado nas anodizações acarretam em um aumento do tamanho dos grãos cristalinos de níquel e dos diâmetros dos nanofios. O tamanho dos grãos de níquel e dos diâmetros dos nanofios variaram, respectivamente, entre 10 a 20 nm e 30 a 50 nm. As amostras apresentam alta anisotropia de forma, com coercividade entre 565 a 725 Oe. As interações magnéticas foram estudadas através das curvas `delta´M, estas mostraram que as interações desmagnetizantes são dominantes nestes sistemas. O modelo de Stoner-Wohlfarth, acréscido de um termo de interação foi utilizado para simular e interpretar o comportamento magnético dos nanofios. Através dos resultados numéricos e experimentais foi verificado que a componente reversível (Mrev) da magnetização independe do estado inicial do sistema, diferentemente do comportamento para a componente irreversível (Mirr). Através da análise das curvas de Mrev(Mirr)Hi , provenientes dos resultados numéricos e experimentais, foi verificado que existe um forte indicativo quanto ao modo de inversão da magnetização por curling, para nanofios
Studies of magnetic and structural properties of nickel nanowires deposited on nanoporous alumina membranes were carried out. The samples were obtained by a two-step anodization, followed by an AC electrodeposition. It was noted that the diameters of the nanowires and the crystalline grain size of the deposited nickel increase with the anodization voltage. The mean diameters and the grain sizes varied from 10 to 20 nm and from 30 to 50 nm, respectively. The samples exhibited a strong shape anisotropy, with coercivities between 565 and 725 Oe. Magnetic interactions were studied via `delta´M curves, which showed that the dominant interactions are rather demagnetizing in these systems. An interacting Stoner-Wohlfarth model was developed to simulate and reproduce the magnetic behavior of the nanowires. From the comparison between numerical and experimental results (which exhibit excellent agreement), it was noted that reversible components of magnetization (Mrev) do not depend on the initial state of the system, whereas irreversible components (Mirr) do. From the analysis of Mrev(Mirr)Hi curves of numerical and experimental results, it was noted that there is strong evidence for the curling magnetization reversal mode for these systems
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3

Bukharaev, A. A., N. I. Nurgazizov, D. A. Biziaev, A. P. Chuklanov, and T. F. Khanipov. "Current-induced Phase Transition in Ni Nanowires." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35343.

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Анотація:
The single ferromagnetic Ni nanowires connecting two contact pads on the silicon oxide surface were fabricated using the scanning probe nanolithography technique based on the nanoindentation of polymethylmethacrylate resist and lift-off process. Wires with height from 9 to 26 nm, wide from 200 to 500 and length from 5 to 13 m were obtained. The atomic and magnetic force microscopy was used to study the morphology and domain structure of the obtained nanowires. Multidomain and single-domain structures depending on the width of the nanowires were observed. Current-induced phase transition from ferromagnetic to paramagnetic state in the Ni nanowires was observed when studing of current-voltage characteristics of such nanostructures. This phenomenon is explained by the Joule heating of ferromagnetic Ni nanowires by the high-density current over Curie temperature. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35343
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4

Li, Yanguang. "Nanostructured Materials for Energy Applications." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275610758.

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5

El, Kousseifi Mike. "Ni silicide contacts : Diffusion and reaction in nanometric films and nanowires." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4349.

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Анотація:
Cette thèse porte sur l'étude des phénomènes qui se produisent lors de la réaction métal-silicium (siliciuration) en couches minces et dans des nanofils. En effet, les phénomènes tels que la germination, la croissance latérale, la croissance normale et la diffusion doivent être compris pour réaliser les contacts des futurs dispositifs de la microélectronique. La comparaison entre la siliciuration en couches minces et dans les nanofils est l'un des principaux aspects de ce travail. La distribution atomique en 3D des éléments chimiques dans les différentes siliciures de Ni a été obtenue par sonde atomique tomographique (SAT). Pour permettre l'analyse par SAT de différents types des nanofils à base de silicium, plusieurs méthodes originales de préparation des échantillons par faisceau d'ions focalisés ont été développées et testées. D'autre part, des mesures in situ et en temps réel de diffusion réactive par diffraction de rayons X ont permis de mettre en évidence l'importance de la germination dans la formation des phases et de déterminer les cinétiques de formation des siliciures de Ni allié en Pt, notamment des régimes de réaction aux interfaces et de croissance latérale. La forme caractéristique associée à la croissance latérale a été déterminée par des analyses ex situ de microscopie électronique en transmission et comparée aux modèles existants. La détermination par SAT de l'espèce qui diffuse majoritairement donne aussi des indications sur les mécanismes de formation des phases et de relaxation des contraintes dans les siliciures
This thesis focuses on the phenomena that occur during the reaction between metal and silicon (silicide) on thin films and nanowires. Indeed, phenomena such as nucleation, lateral growth, normal growth and diffusion must be understood to make contacts for future microelectronic devices. The comparison between the silicide formation on thin films and nanowires is one of the main aspects of this work. Atomic distribution in 3D for the elements in different Ni silicide phase was obtained by atom probe tomography (APT). To enable the analysis of different types of silicon nanowires by APT, several original methods for sample preparation by focused ion beam has been developed and tested. On the other hand, in situ and real-time analysis by X-ray diffraction during the reactive diffusion helped to highlight the importance of the nucleation of a phase and to determine the kinetics of formation of Ni(Pt) silicides, including the reaction on the interfaces and the lateral growth. The characteristic shape associated with the lateral growth was determined by ex-situ transmission electron microscopy analyzes and was compared with the existing theoretical models. Moreover, the determination of the fastest diffusing species by APT provided information on the mechanisms of phase formation and stress relaxation in the silicide
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6

Böhnert, Tim [Verfasser], and Kornelius [Akademischer Betreuer] Nielsch. "Magneto-thermopower and Magnetoresistance of Co-Ni Alloy and Co-Ni/Cu Multilayered Nanowires. / Tim Böhnert. Betreuer: Kornelius Nielsch." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2014. http://d-nb.info/1052996698/34.

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7

Silva, Elvis Lira da. "Propriedades estruturais e magnéticas de nanofios de Ni e Co." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278291.

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Анотація:
Orientadores: Marcelo Knobel, Daniela Zanchet
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
Made available in DSpace on 2018-08-11T12:53:07Z (GMT). No. of bitstreams: 1 Silva_ElvisLirada_M.pdf: 8983880 bytes, checksum: 9cf84b0bedd17ff35f94bf813d128441 (MD5) Previous issue date: 2006
Resumo: Os arranjos de nanofios magnéticos tem atraído um interesse considerável da comunidade científica, motivado principalmente pela sua utilização como sistemas-modelo e na possível aplicação em mídias magnéticas de alta densidade de informação. O comportamento magnético macroscópico desses sistemas é fortemente dependente das anisotropias magnéticas efetivas (determinadas principalmente pelas contribuições das anisotropias de forma, magnetocristalina e magnetoelástica). Neste trabalho realizamos um estudo completo das propriedades magnéticas de nanofios magnéticos de Ni e Co, variando o comprimento dos nanofios e a temperatura das amostras. Os nanofios são obtidos por eletrodeposição em nanoporos de membranas de alumina preparadas por um duplo processo de anodização em substratos de alumínio. A caracterização estrutural dos nanofios foi feita por microscopia eletrônica de varredura de alta resolução e microscopia de força magnética e revela que os arranjos de nanofios estão organizados em uma rede hexagonal onde possuem diametros de aproximadamente 35 nm e a distância entre os nanofios de aproximadamente 105 nm. O comprimento dos nanofios varia de aproximadamente 560 nm até 2250 nm. Observamos uma mudança do eixo fácil de magnetização da direção paralela ao eixo dos nanofios na temperatura ambiente para direção perpendicular ao eixo dos nanofios em baixas temperaturas. Analisamos a dependência da remanência reduzida e da coercividade em relação à temperatura e verificamos que as amostras apresentam uma temperatura de cruzamento entre as remanências reduzidas com campo aplicado paralela e perpendicularmente ao eixo dos nanofios, que varia de acordo com o comprimento dos nanofios. Interpretamos nossos resultados em termos de uma competição entre a anisotropia de forma, que tende orientar a magnetização na direção paralela ao eixo dos nanofios, e uma anisotropia dependente da temperatura, que tenta alinhar a magnetizaçao na direção perpendicular ao eixo dos nanofios. O mecanismo utilizado para tentar explicar de maneira qualitativa os resultados que observamos, ao diminuirmos a temperatura da amostra, origina-se da tensão provocada pela alumina sobre os nanofios, em decorrência dos diferentes coeficientes de expansão térmica desses materiais, que induz uma anisotropia magnetoelástica perpendicular ao eixo dos nanofios
Abstract: Arrays of magnetic nanowires have attracted considerable interest, mainly motivated by their use as model systems and by possible applications in high-density magnetic information storage. The macroscopic magnetic behavior of such systems is strongly dependent on the effective magnetic anisotropy (mainly determined by shape and crystalline contributions). In this work, we carry out a systematic study of the magnetic properties on highly-ordered magnetic arrays of Co and Ni nanowires as functions of length of the nanowires and temperature. Nanowires were obtained by electrodeposition into nanopores of alumina membranes prepared by a two-step anodization process from pure aluminium. Structural studies were performed by high resolution scanning electron microscopy and magnetic force microscopy. The images revealed uniform arrays of nanowires with diameter of 35 nm, and with hexagonal symmetry arrangement with lattice constant (or inter-nanowire distance) of 105 nm. The nanowires length varies between 560 nm and 2250 nm. We observed a change in the magnetic easy axis from parallel to the axis wires at room temperature to transverse to the wire axis at low temperatures. We analysed the temperature dependence of the reduced remanence and coercive field we verified that the samples present a crossover temperature of reduced remanence with magnetic field applied both perpendicular and parallel to the nanowires axis that varies with nanowires length. We interpreted our results in terms of a competition between the shape anisotropy of the wires, which tends to align the magnetization along the wires axis and the temperature dependent magnetic anisotropy, which tends to orient the magnetization transverse to the wires axis. The mechanism which can qualitatively explain the observed results as a function of temperature is an induced anisotropy of magnetoelastic origin transversal to the nanowires axis, caused by strains and stresses, due to the different thermal expansion coefficient of nanowires and the alumina matrix, respectively
Mestrado
Materiais Magneticos e Propriedades Magneticas
Mestre em Física
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8

Peixoto, Thiago Ribeiro Fonseca. "Análise FORC em nanofios de Ni e Co e excitação de mágnons de superfície em filmes de O-Fe/W(001) via SPEELS." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-26012011-124128/.

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Estudamos o comportamento estático e os mecanismos de inversão da magnetização de arranjos auto-organizados de nanofios de Ni e Co com alta anisotropia de forma. Os arranjos são obtidos a partir da anodização em dois passos de lâminas de Al e subseqüente eletrodeposição do metal magnético. Sua caracterização estrutural é realizada por microscopia eletrônica de varredura, microscopia de força atômica e magnética e difração de raios X. Seu comportamento magnético é estudado a partir da medida de curvas de inversão de primeira ordem (FORCs) a temperatura ambiente, via magnetometria SQUID ou de amostra vibrante. A análise FORC consiste na construção de uma mapa da resposta magnética do material a partir dos dados experimentais e pode ser interpretado a partir da analogia direta com o modelo de histerese de Preisach. Apresentamos resultados da influência dos diâmetros dos nanofios e do ângulo do campo externo aplicado em relação ao eixo de anisotropia sobre as principais características dos diagramas FORC. Estudamos também a dinâmica de spins em superfícies de O-Fe/W(001) através de espectroscopia por perda de energia de elétrons spin-polarizados (SPEELS). As amostras consistem em 30 monocamadas atômicas de Fe crescidas sobre um monocristal de W(001), via epitaxia por feixe molecular a temperatura ambiente. Subseqüentemente, a amostra é exposta a 5 langmuirs de O2 e sofre um suave annealing a 500 K. A estrutura e a pureza da amostra são analisadas por difração de elétrons de baixas energias e espectroscopia de elétrons Auger. A caracterização magnética é realizada por magnetometria por efeito Kerr magneto-óptico, resultando num filme com alta magnetização remanente no plano. Os espectros de SPEELS revelam uma rica profusão de picos inelásticos tipo spin-flip e nãospin-flip, que exibem clara dispersão ao longo de toda a zona de Brillouin de superfície. Os resultados são atribuídos a modos de superfície de fônons e mágnons (ondas de spin), de acordo com resultados da literatura e com modelos teóricos atuais.
We study the static behavior and the mechanisms of magnetization reversal of arrays of self-organized Ni and Co nanowires with high shape anisotropy. The arrays are obtained by two-step anodization of Al foils and subsequent electrodeposition of the magnetic metal.Their structural characterization is obtained by scanning electron microscopy, atomic and magnetic force microscopy and X-ray diffraction. Their magnetic behavior is studied from the measurement of first order reversal curves (FORCs) at room temperature, via SQUID or vibrating sample magnetometry. The FORC analysis method consists in building a map of the magnetic response of the material from the experimental data and it can be interpreted from the direct analogy with the Preisach model of hysteresis. We present results of the influence of the diameter of the nanowires and the angle of the applied external field in relation to the anisotropy easy-axis on the main features of the FORC diagrams. We also study the spin dynamics of O-Fe/W(001) surfaces through spin-polarized electron energy loss spectroscopy (SPEELS). The samples consist of 30 atomic monolayers of Fe grown on a W(001) single crystal via molecular beam epitaxy at room temperature. Subsequently, the samples are exposed to 5 langmuirs of O2 and suffer a mild annealing at 500 K. The structure and purity of the samples are analyzed by low-energy electron diffraction and Auger electron spectroscopy. The magnetic characterization is performed by magneto-optical Kerr effect magnetometry, resulting in films with high remanent in-plane magnetization. SPEEL-spectra reveal a rich profusion of inelastic spin-flip and non-spin-flip peaks, which exhibit clear dispersion for wave vectors throughout the whole surface Brillouin zone. The results are attributed to surface modes of phonons and magnons (spin waves), in accordance with the literature and with current theoretical models.
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Miguel, Federico Luis Verfasser], and Frank [Akademischer Betreuer] [Mücklich. "Design and characterisation of Ni-matrix nanocomposite films reinforced with Ag-coated SnO2 nanowires for electrical contact applications / Federico Luis Miguel. Betreuer: Frank Mücklich." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2016. http://d-nb.info/1104733366/34.

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Huang, Ciou-yu, and 黃秋玉. "Studies of electroplating Ni-film and Ni-nanowire in the supercritical carbon dioxide." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/99111051813347681830.

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碩士
國立中正大學
化學工程所
95
This study is to investigate the characteristic of nickel electroplating in supercritical carbon dioxide (SC-CO2) electroplating process, and to apply this technology to produce Ni-nanowires in anodic aluminum oxide template. It is found that the Ni-film is polycrystalline structure and grain size of the Ni-film decrease with increasing pressure under SC-CO2 electroplating. The reasons could be attributed to: (i) pressure can induce nucleation rate and (ii) the emulsified electrolyte by SC-CO2 acts like pulsation electroplating, leading to a decrease in grain size. In addition, because fine grain size and reduce porosity of the Ni-film under SC-CO2 electroplating. The hardness of the Ni-film in the pressure 10.2MPa to reach 8.29GPa and is about four-time higher than that by ambient electroplating (2GPa). Due to SC-CO2 having the advantages of low surface tension and high mass transfer, the electrolyte can be brought into nanopores, leading to an enhancement of the Ni-nanowire filling rate in anodic aluminum oxide template. Ni-nanowire and Ni-film is like polycrystalline structure and also decreases with increasing pressure. Both of produced Ni-film and Ni-nanowire have the same decreasing trend in coercive field and squareness ratio as increasing pressure.
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Книги з теми "Ni Nanowire"

1

Osika, Anita A. V. The electrical properties of electrochemically fabicated: Ni nanowires. Dept of Chemistry, U of Toronto, 2000.

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Частини книг з теми "Ni Nanowire"

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Katakam, Krishna Chaitanya, Sudhakar Rao Gorja, and Natraj Yedla. "Influence of Crystallographic Orientation on the Mechanical Properties and Deformation Behavior of Ni Nanowire Using Large Scale Molecular Dynamics." In Springer Proceedings in Materials, 75–84. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3937-1_8.

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Chèze, Caroline. "Ni Collector-Induced Growth of GaN Nanowires on C-Plane Sapphire by Plasma-Assisted Molecular Beam Epitaxy." In Wide Band Gap Semiconductor Nanowires 1, 157–76. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984321.ch7.

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Pan, H., J. B. Yi, B. H. Liu, S. Thongmee, J. Ding, Yuan Ping Feng, and Jian Yi Lin. "Magnetic Properties of Highly-Ordered Ni, Co and Their Alloy Nanowires in AAO Templates." In Solid State Phenomena, 123–26. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908451-18-3.123.

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Sharma, Sanjeev Kumar, Parveen Kumar, and Balwinder Raj. "Introduction to Nanowires." In Advances in Computer and Electrical Engineering, 1–15. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-6467-7.ch001.

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This chapter describes nanowires (NWs), their types, characteristic features, and their use in sensor and transistor applications as well. Introductory part in general explains briefly about nanowires (NWs), their characteristics features, types, as well as their most significant properties. The types of nanowires (NWs) can be of conducting materials such as Ni, Pt, Au; semiconducting materials like Si, InP, GaN; as well as insulating materials like that of SiO2, TiO2, etc. The property of nanowires includes mechanical, electrical, chemical, optical, and thermal properties. Also, a small description of nanowires (NWs) and sensors are explained with their performance parameters. Furthermore, nanowires (NWs)-based transistors are discussed in addition with their characteristics and applications. Finally, this chapter concludes with the significance of nanowires (NWs) in contemporary era.
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5

A., Carlos, Ettore Vassallo, Emilio De, and Manuel Vzquez. "On the behavior of Ni Magnetic Nanowires as studied by FMR and the effect of “blocking”." In Nanowires - Fundamental Research. InTech, 2011. http://dx.doi.org/10.5772/16926.

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Pelez, Samuel, Carlo Guerrero, Ricardo Paredes, Pedro A., and Pedro Garca-Mochales. "Modelling Metallic Nanowires Breakage for Statistical Studies: Ni Case as Example." In Electrodeposited Nanowires and their Applications. InTech, 2010. http://dx.doi.org/10.5772/39483.

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Naghib, Seyed Morteza, Seyed Mahdi Katebi, and Sadegh Ghorbanzade. "Material and Biomaterial for Biosensing Platform." In Electrochemical Biosensors in Practice: Materials and Methods, 59–104. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815123944123010004.

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The fourth chapter focuses on essential materials for biosensing platform research, including graphene, carbon nanotubes, conductive polymer, and other advanced materials. This chapter describes the function of each biosensing platform and the most recent advances in the synthesis and application of advanced materials. After three sections on the subject's fundamentals, this and the following two chapters present experimental and research-relevant material. For this purpose, carbon-based materials will be examined first, including the following categories: fluorines, carbon nanotubes, graphene, nanodiamonds of carbons, carbon nanohorns, carbon dots, and carbon nanofibers. This section examines the research on these materials and the types of conductive polymers utilized in electrochemical biosensors. Several polymers and their functional techniques, including MNPPFs, MIP/SIPs, and dendrimers, are examined in the following sections. The nanoparticles, such as Au, Pt, Ag, Pd, Ni, Cu, Fe2O3 , TiO2 , ZnO, zeolites and other aluminosilicates, inorganic quantum dots, doped inorganic NMs, nanowires, Carbon black, and calixarenes, are then investigated. Then, biological materials are examined, including enzymatic nanocomposites, nucleic acid nanocomposites, immunoassay-based nanocomposites, aptamers, and biopolymeric nanocomposites. Finally, sandwich- or composite-based biosensor materials are discussed.
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Low, It-Meng, Hani Manssor Albetran, Victor Manuel de la Prida Pidal, and Fong Kwong Yam. "Ni Nanowires Grown in Anodic TiO2 Nanotube Arrays as Diluted Magnetic Semiconductor Nanocomposites." In Nanostructured Titanium Dioxide in Photocatalysis, 273–84. Jenny Stanford Publishing, 2021. http://dx.doi.org/10.1201/9781003148531-18.

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Тези доповідей конференцій з теми "Ni Nanowire"

1

Kansara, Shivam, Sanjeev Gupta, and Yogesh Sonvane. "Diameter effects on the quantum confined Ni nanowire arrays." In DAE SOLID STATE PHYSICS SYMPOSIUM 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5112934.

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Marjoribanks, R. S., L. Lecherbourg, P. Audebert, J.-P. Geindre, B. Teeple, M. Servol, A. Héron, et al. "Ultra-intense 35fs Laser-Matter Interaction Physics in Nanostructured Ni-Nanowire Targets." In Frontiers in Optics. Washington, D.C.: OSA, 2008. http://dx.doi.org/10.1364/fio.2008.fmb3.

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3

Gapin, A., X. Ye, J. F. Aubuchon, L. Chen, and S. Jin. "Patterned Media Based on Soft/Hard, Composite Nanowire Array of Ni/CoPt." In INTERMAG 2006 - IEEE International Magnetics Conference. IEEE, 2006. http://dx.doi.org/10.1109/intmag.2006.376287.

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Bhuyan, Prabal Dev, Sanjeev K. Gupta, Yogesh Sonvane, and P. N. Gajjar. "Quantum transport properties of Ni/Si nanowire for nano-electronic device application." In DAE SOLID STATE PHYSICS SYMPOSIUM 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5113283.

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Marjoribanks, R. S., M. Servol, L. Lecherbourg, P. Forrester, H. Levy, L. McKinney, B. Teeple, et al. "Theory and experiment in ultraintense laser-matter interaction in nanostructured Ni-nanowire targets." In 2008 Conference on Lasers and Electro-Optics (CLEO). IEEE, 2008. http://dx.doi.org/10.1109/cleo.2008.4552391.

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Hollinger, R., S. Wang, H. Song, R. Nedbailo, Y. Wang, V. Shlyaptsev, J. Rocca, et al. "K-shell spectroscopy of Ni nanowire plasmas heated with highly relativistic laser pulses." In 2021 IEEE International Conference on Plasma Science (ICOPS). IEEE, 2021. http://dx.doi.org/10.1109/icops36761.2021.9588459.

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Park, Joung-Man, Pyung-Gee Kim, Jung-Hoon Jang, Sung-Ju Kim, Dong-Jin Yoon, George Hansen, and K. Lawrence DeVries. "Self-sensing of CNF and Ni nanowire/PVDF and cellulose composites using electro-micromechanical test." In NanoScience + Engineering, edited by Elizabeth A. Dobisz and Louay A. Eldada. SPIE, 2007. http://dx.doi.org/10.1117/12.731389.

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Feng Tian, Dan Wei, and Jing Zhu. "Experimental and micromagnetics studies on magnetism of Ni nanowire arrays prepared with magnetic field induction." In INTERMAG Asia 2005: Digest of the IEEE International Magnetics Conference. IEEE, 2005. http://dx.doi.org/10.1109/intmag.2005.1464114.

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Park, Joung-Man, Sung-Ju Kim, Pyung-Gee Kim, Dong-Jin Yoon, George Hansen, and K. Lawrence DeVries. "Self-sensing and actuation of CNF and Ni nanowire/polymer composites using electro-micromechanical test." In MOEMS-MEMS 2007 Micro and Nanofabrication, edited by Allyson L. Hartzell and Rajeshuni Ramesham. SPIE, 2007. http://dx.doi.org/10.1117/12.703384.

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Melilli, G., B. Madon, M. C. Clochard, and J. E. Wegrowe. "Orientation effect on the giant stress field induced in a single Ni nanowire by mechanical strain." In SPIE Nanoscience + Engineering, edited by Henri-Jean Drouhin, Jean-Eric Wegrowe, and Manijeh Razeghi. SPIE, 2015. http://dx.doi.org/10.1117/12.2189085.

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