Synthesis of micro-composite beads with magnetic nano-particles embedded in porous CaCO[sub]3 matrixVesel, Alenka (Avtor) Košak, Aljoša (Avtor) Haložan, David (Avtor) Eleršič, Kristina (Avtor) , Inštitut za kovinske materiale in tehnologije (Lastnik avtorskih pravic) compositesurface characterizationXPSfunctionalizationFe nanoparticlesmicrobeadsA method for synthesis of soft magnetic microbeads is presented. The microbeads are made from magnetic nanoparticles dispersed in CaCO3 (calcium carbonate) matrix. The composite beads are almost perfectly spherical with a diameter of few micrometers. The majority of the composite beads consists of a porous CaCO3 matrix. Magnetic nanoparticles with a size of about 10-15 nm are made of Fe2O3. They are captured inside the pores of CaCO3 matrix during its formation. CaCO3 matrix is formed by crystallization from saturated solution of sodium carbonate and calcium chloride. The composite beads are coated with a layer of functionalized polymer. The magnetic microbeads were characterized by SEM and XPS. Different functional groups were detected by XPS measurements including SO3–,NH3+,NH2,CO32– and OH groups. The results indicate that the iron oxide particles are absent on the surface and that the polymer coating serves as a good biocompatible film.20122017-03-23 15:20:43Znanstveno delo65241ISSN: 1580-2949UDK: 620.3:546.723-31OceCobissID: 106193664COBISS_ID: 25694759ISSN pri članku: 1580-2949NUK URN: URN:SI:UM:DK:KIEPTJ28sl