Dimethylsulfoxide as a media for one-stage synthesis of the Fe3O4-Based ferrofluids with a controllable size distribution

Kirillov, V. L.; Yakushkin, S. S.; Balaev, D. A.; Dubrovskiy, A. A.; Semenov, S. V.; Knyazev, Yu. V.; Bayukov, O. A.; Velikanov, D. A.; Yatsenko, D. A.; Martyanov, O. N. Source: MATERIALS CHEMISTRY AND PHYSICS, 225 292-297; 10.1016/j.matchemphys.2019.01.003 MAR 1 2019

The ultrafine (d = 4 nm) magnetite ferrofluid with a narrow nanoparticle size distribution has been synthesized in one stage at room temperature from a solution of iron(II) and (III) chlorides in dimethylsulfoxide (DMSO) with the propylene epoxide admixture. This is the first example of obtaining a stable concentrated ultrafine magnetite/DMSO ferrofluid at room temperature. X-ray diffraction, transmission electron microscopy, ferromagnetic resonance, Mössbauer spectroscopy, and magnetostatic study have been used to elucidate the role of DMSO and the H₂O/DMSO ratio in the formation of a stable colloid with a desired nanoparticle size. The initial stages of the magnetite nanoparticles formation have been investigated by the ferromagnetic resonance technique.