PRODUCTOS

  • Structure and magnetic properties of nickel nanoparticles

    15/12/2014· 1. Introduction. Much attention has been paid to preparation of magnetic nanoparticles in last decade .Many papers describe preparation of Ni nanoparticles by reduction of aqueous solution of nickel salts alternatively with or without addition of alcohol or oil,,,,,.Some other stone describe production of nickel nanoparticles by micelles route,, by utilization of plant extracts as

    Synthesis and magnetic properties of nickel nanoparticles

    @article{osti_22606283, title = {Synthesis and magnetic properties of nickel nanoparticles}, author = {Singh, Jaiveer, E-mail: [email protected], E-mail: [email protected] and Patel, Tarachand and Okram, Gunadhor S. and Kaurav, Netram, E-mail: [email protected], E-mail: [email protected]}, abstractNote

    (PDF) Nickel Colloid Nanoparticles: Synthesis

    Nickel Colloid Nanoparticles: Synthesis, Characterization, and Magnetic Properties Article (PDF Available) in Journal of Cluster Science · February 2019 with 411 Reads How we measure 'reads'

    Self-assembly of nickel: from nanoparticles to foils with

    The metal nickel possesses tunable coercivity: nanoparticles (75 Oe), nanochains (100 Oe), nanowires (290 Oe), nanowire nonwoven fabrics (280 Oe), and foils (130 Oe), which is related to their morphologies and sizes. This feasible approach shows an effective strategy to fabricate the magnetic

    Synthesis and magnetic properties of shuriken-like nickel

    Shuriken-like nickel nanoparticles were successfully synthesized by a thermal decomposition method at 200 °C with Nickel(II) acetylacetonate (Ni(acac) 2) as the precursor and oleylamine (OAm) as the solvent and reductant, respectively.The phase structures, morphologies and sizes, and magnetic properties of the as-synthesized nickel products were characterized in detail by using X-ray

    Magnetic and electrochemical properties of nickel oxide

    The synthesis of nickel oxide is carried out in two steps. First, we synthesized the nanoparticles of nickel oxalate dihydrate from two micro-emulsions (I and II) as described below. In the second step, the nickel oxalate dihydrate particles were subjected to a careful thermal decomposition to yield nanoparticulate nickel oxide.

    Synthesis and characterization of nickel nanoparticles by

    Nickel is one of the more important magnetic materials. To further investigate the magnetic properties of the resultant nickel nanoparticles, a typical sample with a mean diameter of 9.2 nm was taken for the magnetic measurement. The magnetization versus magnetic field plots (M–H loops) at 25 °C are shown in Fig. 5. No significant hysteresis

    Synthesis and Magnetic Properties of Nickel Nanorods

    In contrast to what is observed for TOPO-protected nickel particles, the saturation magnetization of HDA-capped nanoparticles is comparable to that of bulk nickel, which demonstrates that the coordination of an amine ligand does not alter the magnetic properties of nickel.

    Synthesis and Magnetic Properties of Nickel Nanorods

    In contrast to what is observed for TOPO-protected nickel particles, the saturation magnetization of HDA-capped nanoparticles is comparable to that of bulk nickel, which demonstrates that the coordination of an amine ligand does not alter the magnetic properties of nickel.

    Magnetic properties of nickel hydroxide nanoparticles

    The magnetic properties of 10 nm size Ni(OH)(2) nanoparticles prepared by sol-gel method have been studied. The magnetic moments increase with decreasing temperature in a low applied field, which

    Properties and Applications of Magnetic Nanoparticles

    Properties. 1. Magnetic Property. The properties of magnetic nanoparticles depend on the synthesis method and stone structure. In most cases, the magnetic nanoparticles range from 1 to 100 nm in size and can display superparamagnetism. Superparamagnetism is caused by thermal effects that the thermal fluctuations are strong enough to

    Synthesis, Characterization, and Magnetic Properties of

    The synthesis and magnetic properties of Ni nanoparticles containing <150 atoms are described. These materials are prepared in an organic solvent using hydrophobic dendrimers as templates, which results in a high degree of size monodispersity. The dendrimer-encapsulated nanoparticles were characterized by UV−vis spectroscopy, transmission electron microscopy, and energy dispersive

    Synthesis and magnetic properties of nickel

    Request PDF Synthesis and magnetic properties of nickel nanoparticles Monodisperse nickel nanoparticles (Ni-NPs) were synthesized via a thermal decomposition process. The NPs were

    Nickel Colloid Nanoparticles: Synthesis, Characterization

    Magnetic properties were demonstrated using SQUID (Quantum Design Squid/VSM). The shift observed in hysteresis loop (M–H) measured at 2 K due to the spin–spin reduced coupling at the nanoparticles surfaces, which gives spin-glass like behavior in the system.

    Magnetic nanoparticles Wikipedia

    Magnetic nanoparticles are a class of nanoparticle that can be manipulated using magnetic fields.Such particles commonly consist of two components, a magnetic material, often iron, nickel and cobalt, and a stone component that has functionality. While nanoparticles are smaller than 1 micrometer in diameter (typically 1–100 nanometers), the larger microbeads are 0.5–500 micrometer

    Chemical synthesis and magnetic properties of HCP and FCC

    as a source of Ni ion. In this article, we report the synthesis, structural, and magnetic properties of various phases of nickel nanoparticles. 2. Experimental All the chemicals used for the synthesis of nickel nanoparticles are purchased from different sources. Nickel nitrate hexahydrate (Ni(NO 3) 2 6H 2O) is obtained from Merck.

    Preparation and magnetic properties of nano size nickel

    30/03/2012· Background. Nickel ferrite, a kind of soft magnetic materials is one of the most attracting class of materials due to its interesting and important properties and has many technical applications, such as in catalysis, sensors and so on.

    Synthesis, Alignment, and Magnetic Properties of

    Magnetic studies showed the nickel nanocubes have over 4 times enhancement in magnetic saturation compared to spherical superparamagnetic nickel nanoparticles. Synthesis, Alignment, and Magnetic Properties of Monodisperse Nickel Nanocubes Journal of

    Magnetic Nanoparticles: Surface Effects and Properties

    25/10/2013· Magnetic nanoparticles can also be used in water treatment . There is still a huge potential for magnetic nanoparticles to be implemented in a wider range of applications, which requires advances in the synthesis methods in order to produce nanoparticles with specific sizes, very narrow size distribution and well controlled magnetic properties

    Chemical Synthesis and Magnetic Properties of

    With the aim of improving the response in magnetic hyperthermia treatments and other biomedical applications, a nanoparticle system based on nickel ferrites has been investigated. Monodisperse ferrite nanoparticles with different proportions of Ni2+ ions and sizes have been produced by an optimized synthesis based on the thermal decomposition method and the seed-growth technique.

    Preparation and magnetic properties of nickel

    nanoparticles can be obtained. Monodisperse nickel nanoparticles were also obtained by introducing surfactants. The results of magnetic characterization showed that the magnetic properties of the hcp nickel nanoparticles are quite different from those of the fcc nickel nanoparticles. 1. Introduction

    Structural Characterization, Magnetic Properties, and

    Magnetic nanoparticles of nickel ferrite were synthesized by using the high-temperature thermal decomposition method. The crystal structure and the size of the nanoparticles were determined.

    Magnetic properties of NiO nanoparticles

    Nickel oxide is rated among a class of nano-materials whose structural and magnetic properties are of great interest at reduced size-scale. The present study focuses on the synthesis of phase pure

    Magnetic nanoparticles: preparation, physical properties

    21/02/2012· Biomedical applications like magnetic resonance imaging, magnetic cell separation, or magnetorelaxometry control the magnetic properties of the nanoparticles in magnetic fluids. Furthermore, these applications also depend on the hydrodynamic size. Therefore, in many cases, only a small portion of particles contributes to the desired effect.

    SYNTHESIS AND MAGNETIC PROPERTIES OF Ni NANOPARTICLES

    Synthesis and magnetic properties of Ni nanoparticles 669 Fig. 2. XRD pattern of Ni nanoparticles prepared by the proposed system. contends with attraction action generated by the magnetic field, and the particle size can be stably suspended [9,10]. The main purpose of this stone is to use the self-developed arc-submerged nanofluid synthetic

    Synthesis, Characterization, and Magnetic Properties of

    The effect of ethylenediaminetetraacetic acid (EDTA) as a capping agent on the structure, morphology, optical, and magnetic properties of nickel oxide (NiO) nanosized particles, synthesized by coprecipitation method, was investigated. Nickel chloride hexahydrate and sodium hydroxide (NaOH) were used as precursors. The resultant nanoparticles were characterized by X-ray diffraction (XRD

    The Study of Structural and Magnetic Properties of NiO

    magnetic properties of nickel nanoparticles are greater than those of nickel microstructures influenced by their size. In Figure 6 and Figure 7 the magnetization is plotted against magnetic field for 10 40 nm and 50 100 nm for T = 10 K and T = 300 K respectively. As it is shown in the figures the relation between M and H (for H big- ger than 0.5 Tesla) is almost linear. Therefore when the

    Synthesis, Alignment, and Magnetic Properties of

    Magnetic studies showed the nickel nanocubes have over 4 times enhancement in magnetic saturation compared to spherical superparamagnetic nickel nanoparticles. Synthesis, Alignment, and Magnetic Properties of Monodisperse Nickel Nanocubes Journal of the American stone Society

    Preparation and magnetic properties of nano size nickel

    30/03/2012· Nickel ferrite, a kind of soft magnetic materials is one of the most attracting class of materials due to its interesting and important properties and has many technical applications, such as in catalysis, sensors and so on. In this stone the synthesis of NiFe2O4 nanoparticles by the hydrothermal method is reported and the inhibition of surfactant (Glycerol or Sodium dodecyl sulfate) on the

    Preparation and magnetic properties of nickel

    Nickel nanoparticles were prepared from the thermal decomposition of nickel(II) acetylacetonate in alkylamines and characterized by powder x-ray diffraction, transmission electron microscopy and magnetic measurement. The reaction temperature, heating rate

    Size-tuneable synthesis of nickel nanoparticles

    Abstract. A facile method is described for synthesising nickel nanoparticles via the thermal decomposition of an organometallic precursor in the presence of excess n-trioctylphosphine as a capping ligand.For the first time, alkylamines with different chain lengths were

    Size dependence of the magnetic properties of Ni

    28/10/2013· Nickel is an important magnetic material. To further investigate the magnetic properties of Ni nanoparticles, magnetic measurements of the four Ni-nanoparticle samples with different particle sizes were carried out. Figure 7 shows their room-temperature hysteresis loops. All four samples show hysteresis behavior, revealing that the

    Monodisperse nickel nanoparticles prepared from a

    Monodisperse nickel nanoparticles around 3.7 nm were prepared by reduction of Ni(acac)2 (acac = acetylacetone) with sodium tetrahydridoborate in a monosurfactant system, in which hexadecylamine (HDA) serves as stabilizer and solvent, without any further size-selective process. The Ni particles show the chara Peking University Centenary Celebrations

    Liquid-Phase Synthesis of Nickel Nanoparticles stabilized

    nickel nanoparticles increases rapidly with saturation at around 10 kOe field, whereas that of hcp nickel nanoparticles it increases slowly with no saturation even at 50 kOe. N. Cordente et al. [28] studied the magnetic properties of fcc nickel with various structural

    Magnetic properties of nickel nanoparticles embedded

    Magnetic properties of the prepared thin films were studied. Due to the nanometer size of nickel particles, their magnetic structure is single domain and they show superparamagnetic behaviour. Anisotropy of magnetic properties was observed when magnetic field is applied parallel or perpendicular to the thin film surface and it was attributed to

    The Study of Structural and Magnetic Properties of NiO

    Nickel Oxide (NiO) is an important transition metal oxide with cubic lattice structure. Among the magnetic nanoparticles, fabrication of nickel nanoparticles is often more difficult than that of the other particles. This is because they are easily oxidized. To achieve pure nickel nanocrystals, numerous methods have been conducted in organic environments in order to prevent formation of

    Synthesis and magnetic properties of nickel

    The structure and magnetic properties of the composite were studied by transmission electron microscopy (TEM) and ferromagnetic resonance (FMR). According to TEM data, the nickel nanoparticles have a spherical shape and their dimensions are described by a narrow distribution function with an average value of 3.2 nm. An analysis of the FMR

    Magnetic properties of nickel nanoparticles embedded in

    Magnetic properties of the prepared thin films were studied. Due to the nanometer size of nickel particles, their magnetic structure is single domain and they show superparamagnetic behaviour. Anisotropy of magnetic properties was observed when magnetic field is applied parallel or perpendicular to the thin film surface and it

 

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