Magnetic Cobalt and Cobalt Oxide Nanoparticles in Hyperbranched Polyester Polyol Matrix

الملخص EN

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.