Preparation and characteristics of core–shell structure cobalt/silica nanoparticles

Preparation and characterization of core–shell structured Co/SiO2 nanosphere

“…It can bee clearly seen from Fig. 6 that the value of saturation magnetization decreases with the increase of the SiO 2 content which is consistent with the literatures [11,21,22]. It indicates that the thick insulator coating layer blocks the turning of the magnetic moment and atom spins are difficult to align with the direction of the applied magnetic field, which leads to low susceptibility and low saturation magnetization.…”

“…Tang et al [9,10] prepared the Fe/SiO 2 nanoparticles by a sol-gel method combined with hydrogen reduction. Fu et al [11] prepared Co/SiO 2 nanoparticles by using a silane coupling agent. However, the silica coating thickness was not well controlled or the morphology is not very good.…”

Preparation and characterizations of SiO2-coated nanoparticles of Mn0.4Zn0.6Fe2O4

“…The surface coating of magnetic nanoparticles with various non-magnetic materials to form core/shell structures results in the formation of new materials [1][2][3][4] that not only opened multidimensional industrial applications in various electronic devices [5][6][7][8][9][10][11] but also ushered in various bio-medical applications [12][13][14]. These nanomaterials in core/shell structures are of great interest for applications in magnetic recording media, catalysts, ferro-fluids, drug delivery and microwave absorbents [6,15].…”

Functionalisation of nanoparticles for biomedical applications

“…When the ligand layer is substantial, there will clearly be a large difference between magnetisation values reported per unit mass of NPs [27,38,64,75,96,155] and that of core magnetic material. There is also evidence that non-magnetic shells can alter the physical and chemical nature (i.e.…”