magnetic properties – TechConnect Briefs

New Functions of Polyolefin for Manipulated Iron Oxide Nanostructure Synthesis

Guo Z., He Q., Wei S., Lamar University, US

In this work, a novel function of PP-g-MA has been successfully explored. Specifically, PP-g-MA has been selected to replace the conventional fatty acid surfactants to fabricate stable iron oxide colloids. The fabrication process was carried [...]

Photon up-conversion and magnetic properties of rare earths-doped NaYF4 nanoparticles

García-Flores A.F., Lesseux G.G., Iwamoto W., Urbano R.R., Rettori C., Universidade Federal do ABC, BR

In this work we have investigated Yb/Er and Yb/Tm co-doped NaYF4 nanoparticles (NPs) as well as Yb and Er single doped ones by means of luminescence, high resolution transmission electron microscopy (HRTEM), X-ray powder diffraction [...]

Composition and magnetic properties of zinc ferrite nanoparticles prepared by co-precipitation method at different temperatures

Reisi Shahraki R., Seyyed Ebrahimi S.A., Ebrahimi M., University of Tehran, IR

In this work, single phase zinc ferrite nanoparticles have been prepared by coprecipitation method at 40, 60 and 80 °C without any subsequent calcination and the effect of the reaction temperature on the composition, structural [...]

‘In situ polymerization and composite formation’ (IPCF): An important synthesis route in advanced materials science

Mallick K., Witcomb M.J., Strydom A.M., Mintek, ZA

‘In situ polymerization and composite formation’ (IPCF) types of reactions for the synthesis of ‘metal-polymer composite material’ have a potential advantage in the area of ‘synthetic material science’ since both the polymer and the nanoparticles [...]

Enhanced ferromagnetism and weak polarization of multiferroic BiFeO3 synthesized by sol-gel auto-combustion method

Wang G.M., Xu J.M., Zhang D., China University of Geosciences, CN

BiFeO3 nanoparticles and ceramics were prepared by sol-gel auto-combustion method. Optimal conditions for the synthesis of pure BiFeO3 nanoparticles were experimentally obtained by X-ray diffraction patterns analysis. Scanning electronic microscope was used to investigate microstructure [...]

Fabrication of Luminescent Superparamagnetic CdSe-QDs/SiO2/Fe3O4 nanocomposite particles

Liu B., Wang D., Huang W., Xie W., Yu M., Yao A., Tongji University, CN

A new kind of water-soluble luminescent superparamagnetic nanocomposite particles has been synthesized using a modified Stöber method combined with an electrostatic assembly process. Fe3O4 nanoparticles with the size of 10 nm were uniformly coated with [...]

Magnetic Properties Of Iron-Filled Multiwalled Carbon Nanotubes

Aguiló-Aguayo N., García-Céspedes J., Pascual E., Bertran E., IN2UB, Universitat de Barcelona, ES

Magnetic properties of iron-filled multiwalled carbon nanotubes have been investigated. Hysteretic and temperature dependent magnetic responses reveal a superparamagnetic behaviour at temperatures below 150ºC. The saturation magnetization of the nanowires at 5K is found to [...]

Synthesis and Characterization of Magnetite Powders

Silverman B.M., Parasher S., Milner B., Zhou B., Headwaters Technology Innovation Group, US

Low-cost magnetic powders have been synthesized by Headwaters Technology Innovation Group. These powders exhibit a strong magnetic susceptibility mainly due to magnetite formation. The potential applications for this product range from cancer treatment, ferrofluids, to [...]

Ferromagnetic Microdisks: Novel Magnetic Particles for Biomedical Applications

Novosad V., Fradin F., Buchanan K.S., Guslienko K.Yu., Yefremenko V., Rosengart A.J., Guy S.G., Bader S.D., Argonne National Laboratories, US

Biomagnetic technologies rely on the ability of biological substances to form supra-molecular structures when they are mixed with magnetic nanoparticles. In this report we will demonstrate how thin film growth technique combined with traditional mask-transfer [...]

Synthesis and Characterization of Ferrite Thin Films Obtained by Soft Chemical Methods

Caruntu D., Caruntu G., Caruntu D., Caruntu G., Ganju D., Advanced Materials Research Institute, US

Highly uniform transition metal ferrite films with controllable thickness and composition can be obtained by finely tuning the reaction conditions through soft chemical synthetic approaches. We report here our initial, successful attempts in developing the [...]