ABSTRACT: The optical properties of multi-functionalized cobalt ferrite (CoFe2O4), cobalt zinc ferrite (Co0.5Zn0.5Fe2O4), and zinc ferrite (ZnFe2O4) nanoparticles have been enhanced by coating them with silica shell using a modified St�ber method. The ferrites ...

Biomagnetic beads, 300 nm in average diameter, were prepared by encapsulating large numbers of ferrite nanoparticles in nonspecific absorption polymer. The coprecipitated ferrite particles, 9.2 nm in diameter, were grown to 12.9 nm by the hydrothermal process (200 �C for 3 h) adding sodium oleate in water. The ...

... Accession Number : AD0047112. Title : THE SYNTHESIS OF FERRITES AND PREPARATION OF COBALT FERRITE SINGLE CRYSTALS. ...

In this paper we describe a new method for preparing fine high-frequency ferrite powders. According to our method, the substances in the reaction are metal nitrates and ammonium hydroxide, the coprecipitation takes place into a colloidal medium and the reaction of forming ferrite is a quick combustion. By eliminating decanting, ...

... The principal materials studied using the methods mentioned above were nickel ferrite, magnetite, manganese ferrite, magnesium ferrite, nickel ...

Sodium oleate was used as coating shell for magnetite, Zn ferrite and Co ferrite powders to stabilize them in the form of aqueous magnetic suspensions. The physical characterization was carried out by applying X-ray diffraction and magnetization measurements. Both crystallite size and magnetic core diameter ranged between 7 and 11 nm. The influence of ...

This work reports on the nucleation of the ?-phase of poly(vinylidene fluoride) (PVDF) by incorporating CoFe(2)O(4) and NiFe(2)O(4) nanoparticles, leading in this way to the preparation of magnetoelectric composites. The fraction of filler nanoparticles needed to produce the same ?- to ?-phase ratio in crystallized PVDF is 1 order of ...

Water-based dextran-ferrite (DF) magnetic fluids for magnetic field hyperthermia were prepared and characterised. Magnetic properties, toxic effects, and mechanisms of magnetic nanoparticles assimilation were investigated. The effective Curie temperature was proved to be too high for self-regulation of heat release. DF based magnetic ...

Magnetic nanoparticles of nickel substituted cobalt ferrite (NixCo1?xFe2O4:0?x?1) have been synthesized by co-precipitation route. Particles size as estimated by the full width half maximum (FWHM) of the strongest X-ray diffraction (XRD) peak and transmission electron microscopy (TEM) techniques was found in the range 18-28�4 nm. Energy dispersive X-ray ...

In this paper, the effect of nanostructures on the magnetic properties like the specific saturation magnetization (?S) and the coercivity (HC) for Mn0.4Zn0.6Fe2O4 ferrite prepared by the co-precipitation method has been presented. We have shown by means of X-ray diffraction that the resulting ferrite is made up of ...

The mixed ferrite systems, namely NiFe2?2xSnxCuxO4 (x=0, 0.1, 0.2, and 0.3) nanoparticles have been studied to understand their structural and magnetic parameters. The NiFe2?2xSnxCuxO4 nanoparticles were prepared by high energy ball milling (HEBM). The samples were characterized by the X-ray diffraction technique. ...

This article, for the first time, reports the preparation of single-crystal copper ferrite nanorods and nanodisks. Using amorphous copper ferrite nanoparticles synthesized by reverse micelle as reaction precursor, single-crystal copper ferrite nanorods were synthesized via hydrothermal method ...

Interaction of cobalt ferrite nanopowder and nucleic acid was investigated. Superparamagnetic cobalt ferrite nanoparticles (6-12 nm) were prepared by mechanochemical synthesis. Structure of the nanopowder was characterized using X-ray diffraction. It was shown that cobalt ferrite ...

A novel combustion method of synthesis has been employed in this study for the preparation of nanoparticles of Ni-Zn ferrites. The preparation method is simple yet effective and its novelty lies in the direct mixing of reactants and the fuel. The structural and morphological studies on the ...

Promising future applications of ferrite nanoparticles in medicine, drug delivery, sensors and ferrofluids are expected to be in wet or humid environments. Therefore nanostructured powders of ferrites having the chemical compositions. NixZn (1?x)Fe2O4 with (x=0.0, 0.25, 0.5, 0.75, and 1) were pressed immediately after ...

In this work zinc ferrite (ZnFe2O4) nanoparticles have been prepared by sol-gel method in two different media, one acidic and another one basic and then annealed at different temperatures from 350 to 800 �C. XRD investigations show that both samples have a single phase spinel structure. Mean crystallite sizes of the samples were ...

A soft-chemistry method is used to synthesize zinc ferrite nanoparticles to prepare a magnetic fluid. We investigate here their internal structure by X-ray Absorption Near Edge Spectroscopy (XANES) and X-Ray Diffraction (XRD). A cross analysis of XANES and Rietveld refinement of XRD spectra shows non-equilibrium site occupancy with ...

Nanosized Zn(0.6)Cu(0.4)Cr(0.5)Fe(1.5-x)La(x)O(4) (x=0 - 0.06) ferrites doped with La are synthesized by a rheological phase reaction method. Polyaniline (PANI)/ferrite nanocomposites are prepared by in situ polymerization method. The structure, morphology and ferromagnetic property of ferrite powders and ...

). Tang, Z.X., S. Nafis, C.M. Sorensen, G.C. Hadjipanayis and K.J. Klahunda, IEEE Trans. Magn., MAG-25

Cobalt ferrite nano-particles were prepared using the co-precipitation method followed by annealing treatment. The formation of nano-particles with different composition, microstructure and sizes were confirmed by X-ray diffraction, Raman, thermogravimetric-differential thermal analysis and transmission electron ...

Magnetic nanoparticles of nickel ferrite (NiFe2O4) have been synthesized by co-precipitation route using stable ferric and nickel salts with sodium hydroxide as the precipitating agent and oleic acid as the surfactant. X-ray diffraction (XRD) and transmission electron microscope (TEM) analyses confirmed the formation of single-phase nickel ...

Magnetic poly(methyl methacrylate) nanocomposites were prepared using oleic acid coated cobalt ferrite and magnetite nanoparticles. Both nanofillers had a similar effect in shifting the glass transition temperature from that of the neat polymer. The cobalt ferrite nanocomposite had magnetic hysteresis at 2 and 300 ...

Nickel ferrite nanoparticles have several possible applications as cathode materials for rechargeable batteries, named �lithium-ion� batteries. In this study, NiFe2O4 was prepared by microwave induced thermohydrolysis. The obtained nanoparticles were characterized by scanning electron microscopy (SEM) and ...

... Title : CONTROL AND REPRODUCIBILITY OF FERRITES PREPARED BY THE FLAME SPRAY-HOT PRESS TECHNIQUE,. ...

New chemical synthesis procedure for preparation of nickel-zinc doped W-type hexagonal, nickel-zinc doped barium ferrite nanoparticles has been developed, using the nitrate-citrate sol-gel auto-combustion method (NCSAM). The crystalline phase attributes, microstructure, morphology, thermal behavior of the as-burnt phase and the ...

Superparamagnetic MnZn-ferrite nanoparticles with a narrow size distribution were prepared at various pH values using precipitation in a reverse microemulsion consisting of hexanol, as an oil phase; surfactant CTAB; and an aqueous solution of metal sulfates. Tetramethyl ammonium hydroxide was used as the precipitating agent and ...

Co1?xNix/2Srx/2Fe2O ferrite nanoparticles were prepared using reverse micelle process. Mean particle size of pure ferrite nanoparticles is approximately 9 nm as determined by transmission electron microscopy (TEM). The heating thermograms of samples confirmed that there are no hydroxides in the ...

A method for the preparation of magnetostrictive-piezoelectric particulate composites with enhanced magnetoelectric effect was developed. The composites were synthesized in situ forming a shell of barium titanate around nanoparticles of cobalt ferrite, varying the composition of the cobalt ferrite magnetostrictive ...

Nanoparticles of Ni0.25Co0.25Zn0.5Fe2O4 with different particle sizes were synthesized by chemical coprecipitation technique. The prepared nanoparticles were characterized and studied by X-ray diffraction, room temperature 57Fe M�ssbauer spectroscopy and DC magnetization. Increase in annealing temperature leads to inversion of ...

The structure and crystal phase of the nanocrystalline powders of Ni1-xCdxFe2O4 (0<=x<=0.5) mixed ferrite, synthesized by wet chemical co-precipitation method, were characterized by X-ray diffraction. Results showed that the lattice parameter increased with increasing Cd concentration. Microstructure was studied by scanning electron microscopy. TG/DTA studies were ...

Ni0.6?xCuxZn0.4Fe2O4 (x=0�0.5) ferrite nanoparticles were prepared, employing a reverse micelle process. X-ray diffraction and transmission electron microscopy evaluations demonstrated that single phase spinel ferrites with narrow size distribution were obtained. Vibrating sample magnetometer was employed to ...

Nickel zinc ferrite nanoparticles, Ni1?xZnxFe2O4 (x = 0, 0.2, 0.5, 0.8, 1.0), with dimensions below 10 nm have been prepared by combining chemical precipitation with high-energy ball milling. For comparison, their analogues obtained by thermal synthesis have also been studied. M�ssbauer spectroscopy, X-ray diffraction, and magnetic ...

Magnetic nanoparticles have recently been very attractive for biomedical applications. In this study, we have synthesized ferrite nanoparticles for application as contrast agents in MRI experiments. Fe3O4 and MnFe2O4 spinel ferrites with a mean size of 11-12 nm, were prepared by a modified ...

Aluminium doped barium and strontium hexaferrite nanoparticles BaAl {sub x}Fe{sub (12-x)}O{sub 19} and SrAl {sub x}Fe{sub (12-x)}O{sub 19} were synthesised via a sol-gel route using citric acid to complex the ions followed by an auto-combustion reaction. This method shows promise for the synthesis of complex ferrite powders with small particle size. It was ...

Ni0.6Zn0.4Fe2O4 ferrite nano-particles with a crystallite size of about 20 nm were prepared by the conventional hydrothermal method, followed by annealing in a microwave oven for 7.5-15 min. The microstructure and magnetic properties of the samples were characterized by scanning electron microscopy, X-ray diffraction, Fourier transform ...

This review summarizes recent advances in synthesis routes for quickly and reliably making and functionalizing magnetic nanoparticles for applications in biomedicine. We put special emphasis on describing synthetic strategies that result in the production of nanosized materials with well-defined physical and crystallochemical characteristics as well as colloidal and magnetic ...

Preparation of manganese ferrite (MnFe2O4) in a polymer template is described in this work. The ferrite-based samples were prepared in situ by two routes: (I) alkaline oxidation of Fe3+ and Mn2+ ions and (II) alkaline oxidation of Fe2+ and Mn2+ ions. The nanocomposites were characterized using chemical analysis, ...

In this experimental study the authors present their results regarding the cellular division rate and the percentage of chromosomal aberrations in the root meristematic cells of Helianthus annuus cultivated in the presence of different volume fractions of magnetic nanoparticle suspensions, ranging between 20 and 100 microl/l. The aqueous magnetic colloids were ...

Nanoparticulate ferrites such as manganese zinc ferrite and nickel zinc ferrite hold great promise for advanced applications in power electronics. The use of these materials in current applications requires fine control over the nanoparticle size as well as size distribution to maximize their packing density. While ...

... ferrite and garnet materials by mixing ... and last, sintering the formed material by heating ... INDUSTRIAL CHEMISTRY AND CHEMICAL PROCESSING. ...

The ferrite nanoparticles of Li0.5Fe2.5O4 spinel ferrite was synthesized by sol-gel auto-combustion technique using the nitrates of the respective cations at low temperature with a final pH 8. A part of as prepared powder was sintered at 700� C for 6 h and treated as the precursor for the gamma irradiation study. ...

The nanocomposite SrFe(12)O(19)/Ni(0.5)Zn(0.5)Fe(2)O(4) ferrite aligned hollow microfibers with the hollow diameter to the fiber diameter estimated about 3/5 have been prepared by the gel precursor transformation process. The nanocomposite binary ferrites with different mass ratios are formed after the precursor calcined at 900�C for ...

Proteins find a more stable environment upon encapsulation in a silica host, because of the polymeric silica frame that grows around the macromolecule and protects them from denaturation. Silica-insulin nanocomposite (SINC) and ferrite-coated SINC (FeSINC) was prepared by polyelectrolytic condensation of silica precursor on insulin and they were studied ...

Micro Raman scattering was used to study the structural stability of cobalt ferrite-based (CoFe2O4) nanoparticles, under illumination with the 514nm line, at 7mW laser power. Different samples were investigated after performing the steps of the magnetic fluid (MF) preparation. Raman spectra of samples peptized at 0.25mol/l perchloric ...

This paper describes a way to develop magneto-optical waveguides via sol-gel process. They are made of cobalt ferrite nanoparticles embedded in a silica/zirconia matrix. Thin films are coated on glass substrate using the dip-coating technique. Annealing and UV treatment are applied to finalize sample preparation. Therefore, planar ...

Due to the magnetic anisotropy introduced by the Co2+ ion in octahedral sites of cubic spinel ferrites, it is possible to tailor the magnetic properties by changing the cobalt content. Magnetic fluids with magnetite-cobalt ferrite nanoparticles given by the formula Co(x)Fe(3?x)O4 with x=0, 0.2 and 0.4 were ...

Nanoparticles are being explored in the targeted drug delivery of pharmacological agents : angiogenesis being one such novel application which involves formation of new blood vessels or branching of existing ones. The present study involves the use of ferrite nanoparticles for precise therapeutic modulation of angiogenesis. The ...

Magnetic nanocomposites consisting of cobalt ferrite nanoparticles embedded in silica matrix were prepared by the coprecipitation method using metallic chlorides as precursors for ferrite. Subsequently composites were annealed at 100, 200 and 300 �C for 2 h. The samples were structurally characterized by X-ray ...

DNA was immobilized on ferrimagnetic particles of cobalt ferrite nanopowder (CoFe(2)O(4)) and its resistance to endonuclease (DNase I) hydrolysis was studied. Immobilization on cobalt ferrite nanoparticles prevented enzymatic cleavage of DNA. This process was not associated with enzyme inactivation under the effect of nanosize cobalt ...

A series of barium hexaferrite nanoparticles (BaO�nFe2O3) with different n values were prepared by the sol-gel method, using goethite and Ba carbonate as raw materials. Phase identification of the samples was investigated by X-ray diffraction (XRD). XRD investigations show that the samples with n=5 and calcined at temperatures higher than 875 �C are ...

Multiferroic and magnetoelectric materials show enormous potential for technological developments. Multiferroic composites are more attractive for applications due to their enhanced properties with respect to single-phase multiferroic materials. In this paper we report on the nucleation of the electroactive ?-phase of poly(vinylidene fluoride), PVDF, by the addition of CoFe2O4 and NiFe2O4 ...

Trypsin, a proteolytic enzyme or a protein, was immobilized onto the surfaces of ferrite (a Fe3O4-?Fe2O3 mixed solution) fine particles, ~8 nm in size, during the process in which the particles were synthesized from an aqueous solution. The process was performed in the open air at a temperature as low as 4 �C and on near-neutral condition of pH<=9, which is compatible ...

Superparamagnetic nickel ferrite single phase nanoparticles with the average crystallite size of �9 nm have been synthesized at a low temperature (220 �C) by the sol�gel auto-combustion method. In the present study the as prepared powder was further calcined at different temperatures for 4 h, resulting in ...

Magnetic nanoparticles are of considerable interest owing to their potential applications in biotechnology and the magnetic recording industry. Iron oxides have received much attention owing to their oxidative stability and biocompatibility; however, other transition metals and their alloys are also under investigation. Cobalt has one of the largest magnetic susceptibilities ...

An easy and convenient method for the synthesis of cobalt and magnesium ferrite nanoparticles is demonstrated using liquid foams as templates. The foam is formed from an aqueous mixture of an anionic surfactant and the desired metal ions, where the metal ions are electrostatically entrapped by the surfactant at the thin borders between the foam bubbles and ...

Nanomagnetic nickel ferrite particles were prepared by sol-gel and co-precipitation techniques. Synthesized samples were annealed at 400 �C and 600 �C for two hour to study the variation of properties with temperature. Structural characterization carried out using X-ray Diffraction Technique (XRD), confirmed the formation of polycrystalline single ...

In this paper, a simple strategy is developed for rational fabrication of a class of jingle-bell-shaped hollow structured nanomaterials marked as Ag@MFe2O4 (M=Ni, Co, Mg, Zn), consisting of ferrite hollow shells and metal nanoparticle cores, using highly uniform colloidal Ag@C microspheres as template. The final composites were obtained by direct ...

The composite of hollow glass microspheres coated by CoFe{sub 2}O{sub 4} nanoparticles has been successfully prepared using urea as precipitator via coprecipitation method. The resultant composites were characterized by X-ray diffraction, field emission scanning electron microscope and vibrating sample magnetometer. The results showed that the slow ...

Nanoparticles of zinc substituted Mg-ferrite with compositions Mg(1- x)Zn x Fe2O4 ( x = 0.15, 0.30 and 0.50) having particle sizes in the range 6.4 nm to 21.4 nm prepared by the co-precipitation method were characterized by 57Fe M�ssbauer spectroscopy, X-ray diffratometry and AC magnetic susceptibility measurements. M�ssbauer ...

(Mn1?xZnx)0.5 Co0.5Fe2O4(x = 0 �1) ferrite nanoparticles were prepared using reverse micelle process. X- ray diffraction patterns demonstrated that single phase spinel ferrites are obtained. Vibrating sample magnetometer (VSM) was employed to probe magnetic properties of samples. The compositional dependence of ...

The DC conductivity and the relative magnetic permeability have been measured as functions of temperature for five powder samples of nanoparticle ferrites (NixZn1?xFe2O4; x=0, 0.25, 0.5, 0.75 and 1), a pure polypyrrole (PPy) powder sample and many composite samples prepared by mixing different ratios of the ...

Magnetic fluid based on cobalt ferrite nanoparticles was obtained using a hydrothermal treatment added to the Massart procedure. This treatment increases the average size of the nanoparticles from 11.9 to 18.7 nm and also improves the dispersity and crystallinity of the cobalt ferrite particles. The ...

A study of the microwave absorbing properties of polymer (epoxy) based nanocomposites is presented. The ferrite nanoparticles employed as filler materials were produced by a co-precipitation method, which was designed for production of large amounts at low cost. The absorbing properties of different kinds of ferrite ...

Based on a self-assembly strategy, spherical mesoporous cobalt and nickel ferrite nanocrystal clusters with a large surface area and narrow size distribution were successfully synthesized for the first time via a template-free solvothermal process in ethylene glycol and subsequent heat treatment. In this work, the mesopores in the ferrite clusters were ...

Due to the interesting magnetic and electrical properties with good chemical and thermal stabilities, nickel ferrite nanoparticles are being utilized in many applications including magnetic resonance imaging, drug delivery and hyperthermia. Recent studies have shown that nickel ferrite nanoparticles produce ...

We have systematically studied the magnetic properties of ferrite nanoparticles with 3, 7, and 11 nm of diameter with very narrow grain size distributions. Samples were prepared by the thermal decomposition of Fe(acac)3 in the presence of surfactants giving nanoparticles covered by oleic acid. High resolution ...

In this paper, a simple strategy is developed for rational fabrication of a class of jingle-bell-shaped hollow structured nanomaterials marked as Ag(MFe{sub 2}O{sub 4}) (M=Ni, Co, Mg, Zn), consisting of ferrite hollow shells and metal nanoparticle cores, using highly uniform colloidal Ag(C) microspheres as template. The final composites were obtained by ...

Ferrite nanoparticles (an intermediate between Fe{sub 3}O{sub 4} and {gamma}-Fe{sub 2}O{sub 3}), {approx}7 nm in diameter, were embedded in beads of a mixed polymer of styrene (St) and glycidyl methacrylate (GMA) by emulsifier-free emulsion polymerization method. The beads were coated with GMA by a seeded polymerization method in order to suppress ...

Enhanced ferrite nanoparticles are a new class of contrast agents for magnetic resonance imaging (MRI). The enhanced ferrites are synthesized by reverse micelles technique to form iron core and oxide or ferrite shell preventing further oxidation of the nanoparticles. The ...

The magnetic properties of superparamagnetic particles are influenced by the supporting matrix. We have systematically studied the DC magnetic properties of loosely packed manganese-zinc ferrite (Mn0.68Zn0.25Fe2.07O3) nanoparticles synthesized using a reverse micelle technique. The results have been compared with those for particles suspended in paraffin ...

Ferrite nanoparticles of composition Zn0.5Ni0.5Fe2O4 were prepared by forced hydrolysis in a polyol (polyol process) from the corresponding iron, nickel, and zinc acetates. Synthesis conditions allowed for obtaining polycrystalline epitaxial clusters of about 22 nm in size with an average crystal size of about 5 nm. These powders were ...

Manganese�magnesium ferrite nanoparticles Mn1?xMgxFe2O4; 0?x?0.25 were prepared by the co-precipitation route. The samples were characterized by X-ray diffraction (XRD), which confirms the single phase spinel structure. Crystallite size, calculated from the (3 1 1) peak using the Scherrer formula, was found to increase with ...

Core/shell nanoparticles consisting of a magnetic core of zinc-substituted manganese ferrite (Mn0.4Zn0.6Fe2O4) and a shell of silica (SiO2) are prepared by a sol gel method using tetraethyl orthosilicate (TEOS) as a precursor material for silica and salts of iron, manganese and zinc as the precursor of the ferrite. ...

... Report Date : AUG 1965. Pagination or Media Count : 18. Abstract : Nickel, nickel zinc, and magnesium zinc ferrite thin films have been prepared ...

... Nickel zinc ferrite powders prepared by flame spraying, fluid bed reactions, and a conventional spray dried technique were deposited on ceramic ...

... Abstract : Nickel zinc ferrite powders prepared by flame spraying, fluid bed reactions, and a conventional spray dried technique were deposited on ...

ABSTRACT: Nearly monodisperse cobalt ferrite (CoFe2O4) nanoparticles without any size-selection process have been prepared through an alluring method in an oleylamine/ethanol/water system. Well-defined nanospheres with an average size of 5.5 nm have been synthesized using metal chloride as the law materials and oleic amine as the ...

Nearly monodisperse cobalt ferrite (CoFe2O4) nanoparticles without any size-selection process have been prepared through an alluring method in an oleylamine/ethanol/water system. Well-defined nanospheres with an average size of 5.5 nm have been synthesized using metal chloride as the law materials and oleic amine as the capping agent, ...

Nearly monodisperse cobalt ferrite (CoFe₂O₄) nanoparticles without any size-selection process have been prepared through an alluring method in an oleylamine/ethanol/water system. Well-defined nanospheres with an average size of 5.5�nm have been synthesized using metal chloride as the law ...

The composites of hollow glass microspheres coated with NiFe2O4 nanoparticles were prepared using poly-acrylamide gel method. The structural characteristics, morphology and electromagnetic properties of the composite powders with different weight percent of glass microspheres (15%, 40%, and 65%) were obtained by X-ray diffraction, scanning electron ...

Magnetic CoFe2O4-functionalized graphene sheets (CoFe2O4�FGS) nanocomposites have been synthesized by hydrothermal treatment of inorganic salts and thermal exfoliated graphene sheets. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations show that cobalt ferrite nanoparticles with sizes of 10�40 nm are well ...

Commercial-quality barium ferrite was made on a laboratory scale by the solid-state reaction of raw hot-rolled mill scale and barium carbonate. The processing parameters are reported. The mechanism of ferrite formation is proposed.

The report details the chemical preparation processes for formation of three cation spinel ferrite films and garnet ferrite films. Analysis and calculation of the basic chemical solutions are included. Crystal structure and composition are verified by X-r...

CoFe/Al2O3 composite nanoparticles were successfully prepared by hydrogen-thermally reducing cobalt aluminum ferrite. Compared with CoFe alloy nanoparticles, the permeability of CoFe/Al2O3 composite nanoparticles was remarkably enhanced and an improved impedance characteristic was achieved due ...

A new ultrasound assisted emulsion (consisting of rapeseed oil and aqueous solution of Zn(2+) and Fe(2+) acetates) and evaporation protocol has been developed for the synthesis of zinc ferrite (ZnFe(2)O(4)) nanoparticles with narrow size distribution. The as-synthesized sample consisted of crystalline zinc ferrite particles with an ...

A sustainable approach for the synthesis of various monodispersed spinel ferrite nanoparticles has been developed that occurs at water-toluene interface under both conventional and microwave hydrothermal conditions. This general synthesis procedure utilizes readily available and ...

In this study CuxMg0.5?xZn0.5Fe2O4 (x=0-0.5) nanoparticles and thin films were prepared by sol-gel processing. The morphologies of nanoparticles were observed by transmission electron microscope (TEM). The M�ssbauer spectroscopy (MS) was employed to determine the site preference of the constitutive elements. Magnetic dynamics of the ...

Nanocrystalline manganese substituted lithium ferrites Li{sub 0.5}Fe{sub 2.5-x}Mn{sub x}O{sub 4} (2.5<=x>=0) were prepared by sol-gel auto-combustion method. X-ray diffraction patterns revealed that as the concentration of manganese increased, the cubic phase changed to tetragonal. Magnetic properties were measured by hysteresis loop tracer ...

Nickel ferrite nanoparicles with various grain sizes are synthesized using annealing treatment followed by ball milling of its bulk component materials. Commercially available nickel and iron oxide powders are first mixed, and then annealed at 1100�C in an oxygen environment furnace and for 3h. The samples are then milled for different times in an SPEX mill. X-ray ...

The structural and magnetic properties of Co(1 - x)Zn(x)Fe(2)O(4) ferrites (Co-Zn ferrites) are investigated in a narrow compositional range around x = 0.6, which is of interest because of applications in magnetic fluid hyperthermia. The study by x-ray and neutron diffraction, M�ssbauer spectroscopy and magnetization measurements is done on ...

Nanoparticles (NPs) are emerging as promising biomedical tools thanks to their peculiar characteristics. Our purpose was to investigate the embryotoxicity of cobalt ferrite and gold NPs through the Embryonic Stem Cell Test (EST). The EST is an in vitro standard assay, which permits to classify substances as strongly, weakly or non-embryotoxic. Due to the ...

A green one-step approach has been developed for the synthesis of amino-functionalized magnetite nanoparticles. The synthesis was accomplished by simply mixing FeCl2 with arginine under ambient conditions. It was found that the Fe2+/arginine molar ratio, reaction duration and temperature greatly influence the size, morphology and composition of magnetic ...

The synthesis and properties of Mg(x)Zn(1 ? x)Fe2O4 spinel ferrites as a low-toxicity alternative to the technologically significant Ni(x)Zn(1 ? x)Fe2O4 ferrites are reported. Ferrite nanoparticles have been formed through both the polyol and aqueous co-precipitation methods that can be readily adapted to ...

The synthesis and properties of Mg((x))Zn((1 - x))Fe(2)O(4) spinel ferrites as a low-toxicity alternative to the technologically significant Ni((x))Zn((1 - x))Fe(2)O(4) ferrites are reported. Ferrite nanoparticles have been formed through both the polyol and aqueous co-precipitation methods that can be readily ...

In this research work, magnetic multi-walled carbon nanotube (MWCNTs) nanocomposites have been created by the assembly of Mn-Co-Ti-substituted barium ferrite nanoparticles onto the surface of MWCNTs. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to demonstrate the successful attachment of ferrite ...

Nanoparticles of Ni0.45Zn0.55Fe2O4 were chemically synthesized by novel precursor method at low temperature. Average particles size was found to be 37 nm. The M�ssbauer spectroscopy studies were carried out on the sample for the investigation of magnetic and structural arrangement of Fe in the nano-crystalline ferrite samples. The values of isomer shift ...

We have prepared composite magnetic core shell particles using the process of soap-free emulsion polymerization and the co-precipitation method. The shell of the synthesized composite sphere is cobalt ferrite (CoFe2O4) nanoparticles and the core consists of poly(styrene-co-methacrylic acid) polymer. The mean crystallite sizes of the ...