Electrochemically synthesis and magnetic properties of Ni nanotube arrays with small diameter

Wang, Xue Wei; Yuan, Zhi Hao; Sun, Shao Qing; Duan, Yue Qin; Bie, Li–Jian

doi:10.1016/j.matchemphys.2008.05.077

Cited by 32 publications

(17 citation statements)

References 25 publications

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“…Such differences are related to the distinct preparation methods, geometrical characteristics, ordering degree of hexagonal symmetry, or the final crystalline structure of the magnetic elements. Polycrystalline Ni NWs and NTs, with 45-nm diameters, fabricated using a direct-current electrodeposition method also showed similar magnetic hysteresis loops for both NW and NT arrays [27]. In the present work, we used a potentiostatic electrodeposition method to grow Ni NWs and NTs strongly textured along the [110] direction, showing different coercivity values along the parallel direction.…”

Section: Introductionmentioning

confidence: 87%

“…These novel nanostructures have recently attracted much interest due to their inner functionalizable surfaces that can be used for drug delivery [23-25] and also owing to their interesting magnetic behavior [20-22]. In particular, Ni NTs have been prepared in nanoporous membranes by triblock copolymer-assisted hard-template method [26], electroplating [27], a sequential electrochemical synthetic method inside conducting polypyrrole NTs [8], and using chemically modified templates [28]. …”

Section: Introductionmentioning

confidence: 99%

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Distinguishing nanowire and nanotube formation by the deposition current transients

et al. 2012

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High aspect ratio Ni nanowires (NWs) and nanotubes (NTs) were electrodeposited inside ordered arrays of self-assembled pores (approximately 50 nm in diameter and approximately 50 μm in length) in anodic alumina templates by a potentiostatic method. The current transients monitored during each process allowed us to distinguish between NW and NT formation. The depositions were long enough for the deposited metal to reach the top of the template and form a continuous Ni film. The overfilling process was found to occur in two steps when depositing NWs and in a single step in the case of NTs. A comparative study of the morphological, structural, and magnetic properties of the Ni NWs and NTs was performed using scanning electron microscopy, X-ray diffraction, and vibrating sample magnetometry, respectively.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Distinguishing nanowire and nanotube formation by the deposition current transients

et al. 2012

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“…From the result of SAED in Fig.3(c), it can be seen that Ni shell is consisted of various Ni crystal grains. Every Ni crystal grain contains one domain at least [24] , therefore it can be considered that there are a variety of Ni domains in the Ni-Cu nanowires. Thicker Ni shell means more domains in the nanowires.…”

Section: Resultsmentioning

confidence: 99%

Preparation and magnetic properties of Cu-Ni core-shell nanowires in ion-track templates

Chen

Duan

Yao

et al. 2015

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Cu-Ni core-shell nanowires, with an inner Cu core diameter of about 60 nm and varying Ni shell thicknesses (10, 30, 50, 60, and 80 nm), were successfully fabricated in porous polycarbonate (PC) iontrack templates by a two-step etching and electrodeposition method. In our experiment, the thickness of Ni shell can be effectively tuned through the etching time of templates. The core-shell structure was confirmed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The X-ray diffraction (XRD) pattern elucidates the co-existence of characteristic peaks for both Cu and Ni, indicating no other phases were formed during preparation. Magnetic hysteresis loops measured via vibrating sample magnetometry (VSM) revealed that Cu-Ni core-shell nanowires with thinner Ni shell exhibited obviously diamagnetic character and together with a weak ferromagnetic activity, whereas ferromagnetic behavior was primarily measured for the wires with thicker Ni shell. With increasing Ni shell thickness, the squareness and coercivity value became smaller due to the shape anisotropy and the formation of multi-domain structure.

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“…The most important is that the electrochemical deposition method can precisely control the potential of each electrode [6], by controlling its potential to control the deposition of diff erent materials, by changing the deposition time to adjust the length of each section of the super-lattice nanowires, that is, electrochemical deposition method can be a good regulation and control of the synthesis of materials. In 1987 Martin et al By using electrochemical and template synthesis methods to combine polycarbonate fi lters as templates to fabricate Pt nanowire arrays successfully.…”

Section: (D) Solution -Liquid -Solid (Sls) Methodsmentioning

confidence: 99%

Experimental Progress of Semiconductor Nanomaterials

Weiqing¹

2018

Nanosci Nanotechnol

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The research of semiconductor nanomaterials is the forefront of contemporary science and technology. Because of its optical nonlinearity and luminescent properties diff erent from the bulk materials, it has great application prospect in the future optical switch, optical storage, light fast conversion and ultra-high speed processing. By arranging the commonly used low-dimensional semiconductor nanomaterials preparation methods and methods of characterization, then compare them, it can helps to open up ideas and aids for in-depth thinking. In this paper, the preparation methods of laser ablation, carbon nanotube template, molten salt, solution-liquid-solid method and template electrochemical method are introduced. The characterization method is analyzed from particle size and morphology, composition and structure analysis, surface interface analysis and several other aspects. KEYWORDS: semiconductor nanomaterials; preparation method; characterization method; Nanoscience is a new scientifi c fi eld that has risen and prevailed in the last century. The fi eld of nanoscience research is a non-macroscopic middle fi eld in which human beings have never been involved, thus opening up a new level of human understanding of the world and allowing people to transform nature directly to molecules and atomic levels. Human science and technology has entered a new era, that is, the nanotechnology era. The new technological revolution, centered on nanotechnology, will become an important research direction in the 21st century. Nano-technology mainly studies the motion laws and interactions between the material composition systems with sizes between 0.1 and 100 nm and its possible practical applications. When the bulk material is gradually refi ned into nano-scale particles, although the composition of the material without any change, but the performance of nanoparticles with the original block of material completely diff erent behavior, such as surface area increases, the electronic state of particles mutations and so on, thus showing a unique volume eff ect, surface eff ect, quantum size eff ect and macro quantum tunneling eff ect, showing a special light, electricity, magnetic, thermal and chemical properties. And these unique performances not only has a wide range of applications in the information storage, optical communications, computers and sensors, metallurgy, chemical and other engineering technology [1], but also opened up some new research and application areas.Because of its optical non-linearity and luminescent properties, the semiconductor nanomaterials have great application prospect in the future optical switch, optical storage, light fast conversion and ultra-high speed processing. In this paper, the main preparation methods and characterization methods of semiconductor nanomaterials are summarized.

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Electrochemically synthesis and magnetic properties of Ni nanotube arrays with small diameter

Cited by 32 publications

References 25 publications

Distinguishing nanowire and nanotube formation by the deposition current transients

Distinguishing nanowire and nanotube formation by the deposition current transients

Preparation and magnetic properties of Cu-Ni core-shell nanowires in ion-track templates

Experimental Progress of Semiconductor Nanomaterials

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