1 Food Toxicology & Contaminants Departmnt, National Research Center, Dokki, Cairo, Egypt. 2 Nutrition Physiology and Toxicology Laboratory (NUTOX), INSERM U866, Bourgogne University, 1 Esplanade Erasme, F-21000 Dijon, France. 3 ProBioGem Laboratory, EA 1026, Polytech'Lille-IUT "A" Bd Paul Langevin, Villeneuve d'Ascq cedex, Université Lille Nord de France, France. 4 Food Science and Technology,...

Accurate scanning probing of magnetic materials at the nanoscale is essential for developing and characterizing magnetic nanostructures, yet quantitative analysis is difficult using the state of the art magnetic force microscopy, and has limited spatial resolution and sensitivity. In this communication, we develop a novel piezomagnetic force microscopy (PmFM) technique, with the imaging princip...

The aim of this study is to evaluate the influence of pH on the synthesis of nanocrystallines cobalt ferrite by combination of sol- gel auto combustion and ultrasonic irradiation methods. Two different fuels, urea and thiourea, along with metal nitrates (oxidant) were used to prepare CoFe2O4 powders. The morphology of the resulting powders was investigated. The powders wer...

A novel synthetic route to polymer-coated ferromagnetic colloids of metallic cobalt has been developed. Well-defined end-functional polystyrenes were synthesized using controlled radical polymerization and used as surfactants in the thermolysis of dicobaltoctacarbonyl to afford uniform ferromagnetic nanoparticles. The presence of the polymer shell enabled prolonged colloidal stability of disper...

We found experimental evidence that shows the effect adsorbed hydrogen can have on CO dissociation. For cobalt nanoparticles supported SiO2, enhances In contrast, inhibits dissociation a film SiO2. Considering nature of deposited by physical vapor deposition, these results be explained preference for to follow hydrogen-assisted mechanism FCC and step-edges, while direct is preferred HCP cobalt....

Silica nanoparticles were directly coated with cobalt hydroxide by homogeneous precipitation of slowly decomposing urea in cobalt nitrate solution. The cobalt hydroxide was amorphous, and its morphology was nanoflower-like. The BET (Brunauer-Emmett-Teller) surface area of the core-shell composite was 221 m²/g. Moreover, the possible formation procedure is proposed: the electropositive cobalt io...

A novel adsorbent based on silica-coated magnetic multiwall carbon nanotubes (MWCNTs) surface modified by dual hydroxy functional ionic liquid (FIL) ([OH]-FIL-m-MWCNTs@SiO2) has been designed and used for the purification of lysozyme (Lys) by magnetic solid-phase extraction (MSPE). Fourier transform infrared spectroscopy (FTIR), a vibrating sample magnetometer (VSM), transmission electron micro...

In this work, an experiment was carried out to investigate the preparation condition of anisotropic, Fe-deficient, M-type Sr ferrite with optimum magnetic and physical properties by changing experimental parameters, such as La substitution amount little additive modification during fine milling process. The compositions calcined ferrites were chosen according stoichiometry LaxSr1-xFe12-2xO19, w...

Nanomaterials are attracted a great deal of attention from scientific community due to its unique properties and applications. The small size ferrites have opened the door for intensive research to utilize their properties for biomedical applications. Cobalt ferrite nanomaterials and its silver doped (Ag-doped) nanocomposites have been prepared using solid state combustion method. This combusti...