A series of cobalt (Co) and its oxides based nanoparticles were synthesized by using hyperbranched polyester polyol Boltorn H20 as a platform and sodium borohydride as a reducing agent. UV, FT-IR, XRD, NTA, and TEM methods were employed to obtain physicochemical characteristics of the products. The average diameter of Co nanoparticles was approximately 8.2±3.4 nm. Their magnetic properties, including hysteresis loop, field-cooled, and zero field-cooled curves were investigated. The nanoparticles exhibit superparamagnetism at room temperature, accompanied by magnetic hysteresis below the blocking temperature.
Medvedeva, O. I., Kambulova, S. S., Bondar, O. V., Gataulina, A. R., Ulakhovich, N. A., Gerasimov, A. V., … Kutyreva, M. P. (2017). Magnetic Cobalt and Cobalt Oxide Nanoparticles in Hyperbranched Polyester Polyol Matrix. Journal of Nanotechnology, 2017, 1–9. https://doi.org/10.1155/2017/7607658