We describe the synthesis, characterisation and surface-modification of magnetic nanoparticles and a poly(N-isopropylacrylamide) microgel, followed by the assembly and characterisation of magnetic nanoparticles on the microgel. To facilitate this deposition, the surface of the microgel is first modified via the layer-by-layer assembly of polyelectrolytes. One advantage of this concept is that i...

We investigate the magnetic and structural properties of the ~001! surfaces of V, Cr, and one monolayer V on Cr in density-functional theory in the local spin-density and the generalized gradient approximation. For both exchange-correlation potentials the surface magnetic moment of Cr is very large (2.6mB) and the V surface is nonmagnetic. One monolayer V on Cr exhibits also a large magnetic mo...

Thermal surface emissions have now been detected from more than a dozen isolated neutron stars, including radio pulsars, radioquiet neutron stars and magnetars. These detections can potentially provide important information on the interior physics, magnetic fields, and surface composition of neutron stars. Understanding the properties of matter and radiative transfer in strong magnetic fields i...

We present the results of Monte Carlo simulations of a model of a γ-Fe 2 O 3 (maghemite) single particle of spherical shape. The magnetic Fe 3+ ions are represented by Ising spins on a spinel lattice that consists on two sublattices with octhaedral and tetrahedral coordination with exchange interactions among them and with an external magnetic field. By varying the particle diameter, we have st...

Abstract The magnetic properties of magnetite nanoparticles (Fe 3 O 4 NPs) strongly depend on their chemical and physical parameters, which can be regulated by a controlled synthesis process. To improve the quality obtained nanoparticles, surface is often modified with organic compounds (from group surfactants, sugars, proteins, or acid). In this study, we synthesized compound DMSA. Then, nanoc...

Surface finishing is one of the most significant steps in industries which are engaged with surface quality. Finishing by magnetic field is a new method of surface finishing. In this process, machining is executed in mechanical way and semi-homogeneous abrasive slurry performs finishing of surfaces. Needed force to grind surfaces is made by magnetic field. Therefor this method is considered as ...

In this paper, a rapid and room temperature electrochemical method is introduced in preparationof Ni doped iron oxide nanoparticles (Ni-IONs) grafted with ethylenediaminetetraacetic acid (EDTA)and polyvinyl alcohol (PVA). EDTA/Ni-IONs and PVA/Ni-IONs samples were prepared through baseelectro-generation on the cathode surface from aqueous solution of iron(II) chloride, iron(III...