Radical Scavenger Properties of Oxide Nanoparticles Stabilized with Biopolymer Matrix

Nanoxide based composites are suitable materials for advanced medical application. Fe3O4, CoFe2O4, and MnO2 nanoparticles, synthesized by different soft chemistry routes (precipitation in the presence of soft template and solution combustion) were coated by a biocompatible polymer, sodium alginate. The oxides and corresponding composites were structural and morphological characterized. The saturation magnetization for Fe3O4-based composite is 10.1 emu.g(-1), resulting magnetic domains of 5.2 nm that suggests a superparamagnetic property. Radical scavenging capability of the composites was investigated by two different methods, Trolox Equivalent Antioxidant Capacity (TEAC) and peroxide-chronoamperometry.