We report a cathodoluminescence (CL) and x-ray photoelectron spectroscopy (XPS) study of the formation calcium vacancies (VCa) hydroxyl ion (VOH) in hydroxyapatite (HAp) nanobelts selectively doped with Fe3+ ions by substituting Ca(II) HAp lattice. Additionally, we paramagnetic behavior Fe concentrations lower than 1 atomic percent (at.%), besides absence superparamagnetism even at around 12 at...

In this work, we report on the synthesis of superparamagnetic iron oxide nanoparticles at room temperature using microemulsion template phase consisting of cyclohexane, water, CTAB as cationic surfactant and butanol as a cosurfactant. Surface modification have been carried out by using poly(ethyleneglycol) (PEG). The structure,morphology, and magnetic properties of the products were characteriz...

Magnetic nanoparticles of magnetite with a size ~8 nm synthesized different type coating were studied by ferromagnetic resonance in the temperature range from 7 to 300 K. The features experimental dependences parameters curve (the magnitude resonant field, line width and intensity) their approximation allowed us estimate values characteristic temperatures. Firstly, value Vervey dependence its o...

We report the synthesis of a wide range of single-crystal spinel platelets with exposed (111) faces, lateral dimensions in the micrometer range, and thicknesses of 20–50 nm, prepared by soft chemical dehydration of well crystallized layered precursors. This method enables the synthesis of the metastable composition NiCoAlO4, which cannot be prepared by conventional solid state synthesis. Becaus...

The graphene system is actively pursued in spintronics for its nontrivial sp electron magnetism and its potential for the flexible surface chemical tuning of magnetoelectronic functionality. The magnetoresistance (MR) of graphene can be effectively tuned under high magnetic fields at cryogenic temperatures, but it remains a challenge to achieve sensitive magnetoelectric response under ambient c...

We study in this paper the possible occurrence of orbital magnetim for twodimensional electrons confined by a harmonic potential in various regimes of temperature and magnetic field. Standard coherent state families are used for calculating symbols of various involved observables like thermodynamical potential, magnetic moment, or spatial distribution of current. Their expressions are given in ...

 is negative in diamagnetic materials and positive in paramagnetic materials. This means that the field and NMR frequency are both typically reduced in diamagnetic materials and enhanced in paramagnetic materials (though in calculating it is important to take account of the effect of the sample shape and the sphere of Lorentz). Paramagnetic/diamagnetic materials are attracted/repelled by a m...

Superparamagnetic particles are widely used for biological applications such as cell separation. The size of the particles is normally in the range of 10 – 20 nm which is much smaller than the size of a cell. Therefore small particles create small force which is not strong enough to separate the cells from solution. Superparamagnetic nanoparticles embedded in Polystyrene microspheres (magnetic ...

We have recently developed compact and water-soluble zwitterionic dopamine sulfonate (ZDS) ligand coated superparamagnetic iron oxide nanoparticles (SPIONs) for use in various biomedical applications. The defining characteristics of ZDS-coated SPIONs are small hydrodynamic diameters, low non-specific interactions with fetal bovine serum, the opportunity for specific labeling, and stability with...