(PDF) Magnetic nanoparticles produced by surfactant

Simple surfactant-assisted milling (SA) as one of the approaches for the preparation of magnetic nanoparticles [22] could help to prepare the surface-modified mechanochemically synthesised CuS

Magnetic nanoparticles produced by surfactant-assisted

Magnetic nanoparticles produced by surfactant-assisted ball milling V. M. Chakka, B. Altuncevahir, Z. Q. Jin, Y. Li, and J. P. Liua Department of Physics, The University of Texas at Arlington, Arlington, Texas 76019 Presented on 1 November 2005; published online 24 April 2006

Magnetic nanoparticles produced by surfactant-assisted

Apr 24, 2006· Nanoparticles of Fe, Co, FeCo, SmCo, and NdFeB systems with sizes smaller than 30 nm and narrow size distribution have been successfully prepared by ball milling in the presence of surfactants and organic carrier liquid. It has been observed that the nanoparticles prepared by milling Fe and FeCo powders were close to spherical in their shapes, whereas those of Co, SmCo, and

Magnetic nanoparticles produced by surfactant-assisted

Apr 01, 2006· Nanoparticles of Fe, Co, FeCo, SmCo, and NdFeB systems with sizes smaller than 30 nm and narrow size distribution have been successfully prepared by ball milling in the presence of surfactants and organic carrier liquid. It has been observed that the nanoparticles prepared by milling Fe and FeCo powders were close to spherical in their shapes, whereas those of Co, SmCo, and Nd-Fe-B

Magnetic nanoparticles produced by surfactant-assisted

Apr 24, 2006· Nanoparticles of Fe, Co, FeCo, SmCo, and NdFeB systems with sizes smaller than 30nm and narrow size distribution have been successfully prepared by ball milling in the presence of surfactants and organic carrier liquid. It has been observed that the nanoparticles prepared by milling Fe and FeCo powders were close to spherical in their shapes, whereas those of Co, SmCo, and Nd–Fe–B showed

Sm–Co hard magnetic nanoparticles prepared by surfactant

Oct 12, 2007· Hard magnetic nanoparticles based on the Sm 2 Co 17 and SmCo 5 systems have been successfully produced using a surfactant-assisted ball milling technique. A size-selection process has been developed to obtain nanoparticles of different sizes with narrow size distribution.

Surfactant Effects on the Structural and Magnetic

Iron oxide nanoparticles were prepared using the simplest and most efficient chemical route, the coprecipitation, in the absence and the presence of three different and widely used surfactants. The purpose of this study is to investigate the possible influence of the different surfactants on the structure and therefore on the magnetic properties of the iron oxide nanoparticles. Thus, different

Anisotropic Sm-(Co,Fe) nanoparticles by surfactant

Samples deposited on copper coated carbon grid showed self-assembled nanoparticles which could be further aligned when subjected to a magnetic field. AB Magnetically hard Sm2 (Co0.8 Fe0.2) 17 and SmCo5 nanoparticles have been produced by using surfactant-assisted low- and high-energy ball milling techniques.

Magnetic nanoparticles produced by surfactant-assisted

Apr 24, 2006· Nanoparticles of Fe, Co, FeCo, SmCo, and NdFeB systems with sizes smaller than 30nm and narrow size distribution have been successfully prepared by ball milling in the presence of surfactants and organic carrier liquid. It has been observed that the nanoparticles

Magnetic nanoparticles produced by surfactant-assisted

Nanoparticles of Fe, Co, FeCo, SmCo, and NdFeB systems with sizes smaller than 30 nm and narrow size distribution have been successfully prepared by ball milling in the presence of surfactants and organic carrier liquid. It has been observed that the nanoparticles

Sm--Co hard magnetic nanoparticles prepared by

Hard magnetic nanoparticles based on the Sm2Co17 and SmCo5 systems have been successfully produced using a surfactant-assisted ball milling technique. A size-selection process has been developed to obtain nanoparticles

Surfactant Effects on the Structural and Magnetic

Iron oxide nanoparticles were prepared using the simplest and most efficient chemical route, the coprecipitation, in the absence and the presence of three different and widely used surfactants. The purpose of this study is to investigate the possible influence of the different surfactants on the structure and therefore on the magnetic properties of the iron oxide nanoparticles

Anisotropic Sm-(Co,Fe) nanoparticles by surfactant

Samples deposited on copper coated carbon grid showed self-assembled nanoparticles which could be further aligned when subjected to a magnetic field. AB Magnetically hard Sm2 (Co0.8 Fe0.2) 17 and SmCo5 nanoparticles have been produced by using surfactant

Ferrofluid Wikipedia

The magnetic attraction of tiny nanoparticles is weak enough that the surfactant's Van der Waals force is sufficient to prevent magnetic clumping or agglomeration. Ferrofluids usually do not retain

Study the adsorption properties of magnetite nanoparticles

Mar 01, 2020· Co-precipitation method is used to prepare magnetite nanoparticles (Fe 3 O 4) which stabilized by two nonionic and one cationic surfactant. 1 H NMR used to confirm the chemical structure of the synthesized surfactants. The prepared magnetite nanoparticles characterized by size distribution (DLS), Fourier transform infrared spectroscopy (FTIR), and magnetic properties (magnetic

MAGNETIC NANOPARTICLES, BULK NANOCOMPOSITE MAGNETS, AND

1. A composition of magnetic nanoparticles comprising: a. a plurality of magnetic nanoparticles produced by surfactant-assisted ball milling, wherein the magnetic nanoparticles have an average size below about 100 nm; and b. the magnetic nanoparticles

Chemical synthesis of magnetic nanoparticles Chemical

Recent advances in the synthesis of various magnetic nanoparticles using colloidal chemical approaches are reviewed. Typically, these approaches involve either rapid injection of reagents into hot surfactant

Development of Novel Magnetic Nanoparticles for

Feb 23, 2011· 3.1 Synthesis of Ctab Coated Fe/Fe 3 o 4 Nanoparticles Via Water in Oil Microemulsion. Two water-in-oil microemulsion are created one containing FeCl 3 aqueous solution, the other with NaBH 4 aqueous solution. First, DI water is degassed by boiling and then cooling in a filter flask under flowing Argon with the mechanical agitation provided by a magnetic

Magnetic nanoparticles produced by surfactant-assisted

Apr 24, 2006· Nanoparticles of Fe, Co, FeCo, SmCo, and NdFeB systems with sizes smaller than 30nm and narrow size distribution have been successfully prepared by ball milling in the presence of surfactants and organic carrier liquid. It has been observed that the nanoparticles

Anisotropic Sm-(Co,Fe) nanoparticles by surfactant

Samples deposited on copper coated carbon grid showed self-assembled nanoparticles which could be further aligned when subjected to a magnetic field. AB Magnetically hard Sm2 (Co0.8 Fe0.2) 17 and SmCo5 nanoparticles have been produced by using surfactant

Anisotropic Sm-Co(Fe) Nanoparticles Produced by Surfactant

Magnetically hard SmCo 5 and Sm 2 (Co 0.8 Fe 0.2 ) 17 nanoparticles have been produced by using surfactant assisted low- and high-energy ball milling. Surfactants prevent the re-welding of the crashed particles during the milling process and thus limit the particle growth. Oleic acid was used as the surfactant

Synthesis of Silica-Coated Fe3O4 Nanoparticles by

Magnetite and silica-coated magnetite (Fe 3 O 4 ) nanoparticles (NPs) were synthesized by water-in-oil (W/O) microemulsion method from hydrated ferric nitrate, ferrous sulfate precursors and ammonia a

MAGNETIC NANOPARTICLES, BULK NANOCOMPOSITE MAGNETS, AND

1. A composition of magnetic nanoparticles comprising: a. a plurality of magnetic nanoparticles produced by surfactant-assisted ball milling, wherein the magnetic nanoparticles have an average size below about 100 nm; and b. the magnetic nanoparticles

Chemical synthesis of magnetic nanoparticles Chemical

Recent advances in the synthesis of various magnetic nanoparticles using colloidal chemical approaches are reviewed. Typically, these approaches involve either rapid injection of reagents into hot surfactant

Tailoring the size in colloidal iron oxide magnetic

size distribution and morphology in nanoparticles obtained by chemical routes. In this work, we have synthesized iron oxide nanoparticles by a chemical route and we have studied the effect of surfactant/precursor ratio on the final particle size. Iron oxide magnetic nanoparticles

Magnetic Nanomedicine SpringerLink

Magnetic nanoparticles produced by surfactant-assisted ball milling. J Appl Phys. 2006;99:08E912. CrossRef Google Scholar. 50. Yiping W, Yang L, Chuanbing R, Liu JP. Sm–co hard magnetic nanoparticles prepared by surfactant

Synthesis of magnetic cobalt ferrite nanoparticles with

In our present work, magnetic cobalt ferrite (CoFe 2 O 4) nanoparticles have been successfully synthesised by thermal decomposition of Fe(III) and Co(II) acetylacetonate compounds in organic solvents in the presence of oleic acid (OA)/ oleylamine (OLA) as surfactants and 1,2-hexadecanediol (HDD) or octadecanol (OCD-ol) as an accelerating agent.As a result, CoFe 2 O 4 nanoparticles

Review Article Magnetic Nanoparticles: A Subject for Both

Single domain magnetic nanoparticles (MNPs) have been a vivid subject of intense research for the last y years. Preparation of magnetic nanoparticles and nanostructures has been achieved by both

Synthesis and Biochemical effects of magnetite

prepared magnetite nanoparticles in the size range of 30-100 nm by oxidizing ferrous hydroxide in reaction with a weak oxidant in a N 2-deaerated aqueous NaOH solution at different temperatures and in the absence of surfactant [20]. Fauziatul et al. synthesized magnetite nanoparticles in the size range of 10-30 nm by surfactant

POLYMER-COATED IRON OXIDE MAGNETIC NANOPARTICLES

2.3 Preparation of polymer coated magnetic nanoparticles Previously produced iron oxide nanoparticles were coated with polymer. It was achieved by emulsion polymerization at a high surfactant

Magnetic nanoparticles: preparation, physical properties

Feb 21, 2012· Stable magnetic nanoparticle dispersions with narrow size distribution were thus produced. The microemulsion seed copolymerization of methacrylic acid, hydroxyethyl methacrylate, and cross-linker resulted in a stable hydrophilic polymeric shell around the nanoparticles. Changing the monomer concentration and water/surfactant

Research Article Ultrasonic Studies of Emulsion Stability

a Magnetic Emulsion Superparamagnetic iron oxide nanoparticles (SPION) were rst synthetized. e Fe 3 O 4 nanoparticles were prepared by chemical precipitation using ferric and ferrous salts in an alkali medium. Freshly prepared magnetic nanoparticles were sterically stabilized by oleic acid C 18 H 34 O 2 []. e thickness of the surfactant

Magnetic nanoparticles: preparation, physical properties

Feb 21, 2012· Stable magnetic nanoparticle dispersions with narrow size distribution were thus produced. The microemulsion seed copolymerization of methacrylic acid, hydroxyethyl methacrylate, and cross-linker resulted in a stable hydrophilic polymeric shell around the nanoparticles. Changing the monomer concentration and water/surfactant ratio controls

Surfactant-assisted production of TbCu2 nanoparticles

the magnetic relaxation of the TbCu 2 nanoparticles. Production of surfactant-assisted TbCu2 nanoparticles and structural and magnetic characterization methods Magnetic nanoparticles of TbCu 2 were produced by means of the high-energy ball milling method adapted to the use of liquids. Basically, appropriate amounts of

Anisotropic Sm-Co(Fe) Nanoparticles Produced by Surfactant

Magnetically hard SmCo 5 and Sm 2 (Co 0.8 Fe 0.2 ) 17 nanoparticles have been produced by using surfactant assisted low- and high-energy ball milling. Surfactants prevent the re-welding of the crashed particles during the milling process and thus limit the particle growth. Oleic acid was used as the surfactant and the heptane as the milling medium.

Chemical Synthesis of Monodisperse Magnetic Nanoparticles

Magnetic Ferrite MFe 2 O 4 (M = Fe, Co, Mn, etc) Nanoparticles . Magnetic ferrites, which adopt cubic spinel structures and have a general formula of MFe 2 O 4, are one of the most important classes of magnetic materials.In such ferrites, oxygen atoms exhibit face-centered cubic (fcc) close packing with M 2+ and Fe 3+ cations occupying either tetrahedral or octahedral interstices.

Synthesis and Biochemical effects of magnetite

prepared magnetite nanoparticles in the size range of 30-100 nm by oxidizing ferrous hydroxide in reaction with a weak oxidant in a N 2-deaerated aqueous NaOH solution at different temperatures and in the absence of surfactant [20]. Fauziatul et al. synthesized magnetite nanoparticles in the size range of 10-30 nm by surfactant-free electrochemical

Development of synthesis method of magnetic nanoparticles

physical properties and magnetic characteristics of nanoparticles. The synthesized MNPs were modified by the addition of oleic acid (0.5, 1, and 1.5 ml) dissolved in ethanol (volume ratio OA:EtOH = 1:4) at 80°C and stirred with a magnetic stirrer for 30 minutes. The nanoparticles were then washed with ethanol and distilled water several times.

Synthesis of magnetic cobalt ferrite nanoparticles with

In our present work, magnetic cobalt ferrite (CoFe 2 O 4) nanoparticles have been successfully synthesised by thermal decomposition of Fe(III) and Co(II) acetylacetonate compounds in organic solvents in the presence of oleic acid (OA)/ oleylamine (OLA) as surfactants and 1,2-hexadecanediol (HDD) or octadecanol (OCD-ol) as an accelerating agent.As a result, CoFe 2 O 4 nanoparticles of

POLYMER-COATED IRON OXIDE MAGNETIC NANOPARTICLES

2.3 Preparation of polymer coated magnetic nanoparticles Previously produced iron oxide nanoparticles were coated with polymer. It was achieved by emulsion polymerization at a high surfactant to monomer ratio as described by Sayar et al. [13]. MMA and AAc were used as comonomers with a weight ratio of 9/1.

Review Article Magnetic Nanoparticles: A Subject for Both

Single domain magnetic nanoparticles (MNPs) have been a vivid subject of intense research for the last y years. Preparation of magnetic nanoparticles and nanostructures has been achieved by both bottom-up and top-down approaches. Single domain MNPs show N ´eel-Brown-like relaxation.

Characterization of Cysteine Coated Magnetite

used as surfactant due to its proper conjunction to the surface of magnetite nanoparticles. Coating density and synthesized ferrofluids were characterized by using transmission electron microscope, thermogravimetry analysis, dynamic light scattering and fourier transform infrared spectroscopy techniques. Magnetic resonance

Effects of surfactant and polymerization method on the

Jul 26, 2016· Read "Effects of surfactant and polymerization method on the synthesis of magnetic colloidal polymeric nanoparticles, Journal of Nanoparticle Research" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Spinel‐Structured Nanoparticles for Magnetic and

Nanoparticles of Fe3O4 have been successfully synthesized using a simple coprecipitation technique from natural iron sands, employing HNO3 and NH4OH as dispersing and precipitating agents, respectively. The substitution of Fe with Mn to result in Fe3-xMnxO4 (0 ≤ x ≤ 3) was conducted to control the magnetic strength of this nano‐sized spinel powder.

Magnetic and Non-Magnetic Nanoparticles from a Group of

Oct 27, 2009· The size and uniformity of magnetic nanoparticles developed from a Group of Uniform Materials Based on Organic Salts (GUMBOS) were controlled using an in situ ion exchange, water-in-oil (w/o) microemulsion preparation. Most of these nanoGUMBOS are in fact ionic liquids (i.e., melting points less than 100 °C), while others have melting points above the conventional 100 °C demarcation.

Magnetic Nanoparticles TILLEY RICHARD DAVID

TECHNICAL FIELD. The present invention relates to methods for preparing magnetic nanoparticles and to nanoparticles produced by those methods. More particularly, the invention relates to methods for preparing nanoparticles comprising metal, metal carbide, metal nitride, metal sulfide, metal phosphide, metal oxide or a mixture thereof.