Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5490600 | Journal of Magnetism and Magnetic Materials | 2017 | 31 Pages |
Abstract
This paper reports the synthesis and magnetic properties of unique magnetite-chitosan nanostructures synthesized by the chemical precipitation of magnetite nanoparticles in the presence of chitosan. The influence of varying synthesis parameters on the morphology of the magnetic composites is determined. Depending on the synthesis parameters, magnetite-chitosan nanostructures of spherical (9-18Â nm), rice-seed-like (75-290Â nm) and lumpy (75-150Â nm) shapes were obtained via self-assembly. Spherical nanostructures encapsulated by a 9-15Â nm chitosan layer were assembled as well. The prospective morphology of the nanostructures is combined with their excellent magnetic characteristics. It was found that magnetite-chitosan nanostructures are ferromagnetic and pseudo-single domain. Rice-seed-like nanostructures exhibited a coercivity of 140Â Oe and saturation magnetization of 56.7Â emu/g at 300Â K. However, a drop in the magnetic properties was observed for chitosan-coated spherical nanostructures due to the higher volume fraction of chitosan.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Oleksii Bezdorozhev, Taras Kolodiazhnyi, Oleg Vasylkiv,