Template Synthesis of an Array of Nickel Nanotubules and Its Magnetic Behavior

Bao, Jianchun; Tie, Chenyang; Xu, Zixing; Zhou, Quanfa; Shen, Di; Ma, Qiang

doi:10.1002/1521-4095(200111)13:21<1631::aid-adma1631>3.0.co;2-r

Cited by 280 publications

(175 citation statements)

References 6 publications

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“…The electrolyte solution used for nickel electrodeposition was 53.6 g L À1 of NiSO 4 .6H 2 O having 30 g L À1 of H 3 BO 3 as a stabiliser. The pH of the solution was around 4.6.…”

Section: Methodsmentioning

confidence: 99%

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Electrodeposition of nickel nanowires and nanotubes using various templates

Ertan

Tewari

Talu

2008

Journal of Experimental Nanoscience

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Nickel nanotubes and nanowires are grown by galvanostatic electrodeposition in the pores of 1000, 100, and 15 nm polycarbonate as well as in anodised alumina membranes at a current density of 10 mA cm À2. The effects of pore size, porosity, electrodeposition time, effective current density, and pore aspect ratio are investigated. Nickel nanotube structures are obtained with 1000 nm pore size polycarbonate membrane without any prior treatment method. At the early stages of electrodeposition hollow nickel nanotubes are produced and nanotubes turn into nanowires at longer depositon times. As effective current density accounting for the membrane porosity decreases, the axial growth direction is favoured yielding nanowires rather than nanotubes. However, for smaller pore size polycarbonate membranes, nanowires are obtained even though effective current densities were higher. We believe that when the pore diameter is below a critical size, nanowires grow regardless of current density since narrow pores promote layer by layer growth of nanorods due to smaller surface area of the pore bottom compared to pore walls. Pore size has a dominant effect over effective current density in determining the structure of the fibres produced for small pores. Nickel nanowires are also obtained in the small pores of anodised alumina, which has higher aspect ratios. High aspect ratio membranes favour the fabrication of nanowires regardless of current density.

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“…The electrolyte solution used for nickel electrodeposition was 53.6 g L À1 of NiSO 4 .6H 2 O having 30 g L À1 of H 3 BO 3 as a stabiliser. The pH of the solution was around 4.6.…”

Section: Methodsmentioning

confidence: 99%

“…[1][2][3][4][5][6][7]. Several studies have been performed to produce metal nanowires in templates since the size and the shape of the nanowires can be controlled easily and accurately [8].…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of nickel nanowires and nanotubes using various templates

Ertan

Tewari

Talu

2008

Journal of Experimental Nanoscience

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“…Nanoholes, for example, with large surface area, can successfully replace the low-purity nanoparticles that are prepared by using more sophisticated techniques for various applications such as catalysis, sensor technology, high-density magnetic storage, and delivery vehicles. 8,9 Inorganic nanotubes have also attained considerable attention during the past few years due to their diverse utilities in racemic mixtures, sensors, selective separation, or selective ion transportation. 8 However, literature on noncarbon nanotubes is limited as compared to their carbon counterparts.…”

Section: Introductionmentioning

confidence: 99%

“…These include chemical routes such as chemical reduction of metallic complexes and chemical vapor infiltration within porous templates such as AAO or polymer nanochannels. 4,9,10,15 There are also reports where nanotubes and nanowires have been synthesized by using highly sophisticated techniques such as pulse laser deposition or molecular beam epitaxy. 16,17 Ferromagnetic nanotubes based on Ni, Fe, and Co are being investigated in great detail due to their application potential in diverse fields such as perpendicular magnetic recording, cell separation, diagnosis, therapeutics, and magnetic resonance imaging for detection.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of High Coercivity Cobalt Nanotubes with Acetate Precursors and Elucidation of the Mechanism of Growth

et al. 2008

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Cobalt nanotubes (CoNTs) with very high longitudinal coercivity were prepared by electrodeposition of cobalt acetate for the first time by using anodized alumina (AAO) template. They were then characterized with X-ray diffraction (XRD), a field emission scanning electron microscope (FESEM), and a transmission electron microscope (TEM). Formation of a highly ordered hexagonal cobalt phase is observed. Room temperature SQUID (superconducting quantum interference device) magnetometer measurements indicate that the easy axis of magnetization is parallel to the nanotube axis. These CoNTs exhibit very high longitudinal coercivity of ∼820 Oe. A very high intertubular interaction resulting from magnetostatic dipolar interaction between nanotubes is observed. Thick-walled nanotubes were also fabricated by using cobalt acetate tetrahydrate precursors. A plausible mechanism for the formation of CoNTs based on mobility assisted growth is proposed. The role of the hydration layer and the mobility of metal ions are elucidated in the case of the growth mechanism of one-dimensional geometry.

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“…Typically, nickel, as one of the non-noble metal materials, has promising applications in drug targeting and catalysis because of an effective electrocatalytic activity toward some organic compounds [7,8]. Many methods such as metal carbonyl pyrolysis [8,9], templated synthesis [10,11], electrochemical deposition [12 -15], and thermal reduction of Ni(II) salts with reducing agents in an organic solvent have been established for preparing Ni nanoparticles [16 -18]. To date, however, few researches have been reported about the electrocatalytic oxidation of calcium dobesilate (calcium 2,5-dihydroxy-benzenesulfonate, CDBS) [19], a synthetic drug to treat chronic venous insufficiency and diabetic retinopathy, but with increased risks of adverse effects in pharmaceutical formulations and human biological matrices, on nanostructured electrodes.…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid-assisted Solvothermal Synthesis of Ni Particles and Study of Their Electrocatalytic Effect for Calcium Dobesilate Oxidation

Meng

Zhang

et al. 2009

Zeitschrift Für Naturforschung B

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This article presents a simple ionic liquid-assisted solvothermal synthesis approach to the preparation of Ni particles from nickel acetylacetonate (Ni(acac) 2 ) as the precursor and N,Ndimethylformamide (DMF) as the solvent, where the ionic liquid, 1-methyl-3-ethoxyl imidazolium tetrafluoroborate ([C 2 OHmim]BF 4 ), was used as the reducing agent and as stabilizer. The as-prepared Ni particles were characterized by means of X-ray diffracion (XRD) and scanning electron microscopy (SEM). The formation mechanism of the Ni particles during the solvothermal process is discussed. The electrocatalytic effect of Ni particles for calcium dobesilate (calcium 2,5-dihydroxybenzenesulfonate, abridged as CDBS) oxidation on glassy carbon (GC) electrodes was investigated using cyclic voltammetry. It was found that the size of the Ni particles could be tuned by properly adjusting the concentration of the ionic liquid [C 2 OHmim]BF 4 and of the reaction time and temperature. Moreover, the Ni particles prepared after reaction at 180 • C for 6 h in the presence of the ionic liquid had a strong electrocatalytic effect on CDBS oxidation, making them potentially applicable in electrochemical biosensors.

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Template Synthesis of an Array of Nickel Nanotubules and Its Magnetic Behavior

Cited by 280 publications

References 6 publications

Electrodeposition of nickel nanowires and nanotubes using various templates

Electrodeposition of nickel nanowires and nanotubes using various templates

Synthesis of High Coercivity Cobalt Nanotubes with Acetate Precursors and Elucidation of the Mechanism of Growth

Ionic Liquid-assisted Solvothermal Synthesis of Ni Particles and Study of Their Electrocatalytic Effect for Calcium Dobesilate Oxidation

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