@article{
author = "Lakić, Mladen and Anđelković, Ljubica and Šuljagić, Marija and Vulić, Predrag and Perić, Marko and Iskrenović, Predrag and Krstić, Ivan and Kuraica, Milorad M. and Nikolić, Aleksandar S.",
year = "2019",
abstract = "Light-transmitting measurements of white light and a consequentially chosen laser beam of 655 nm propagating
through citrate- and oleate-coated CoFe2O4, FeFe2O4, and MgFe2O4 nanoparticles under the influence of an
external magnetic field were presented. New experimental settings were developed for the optical study of
ferrites’ behavior in ferrofluid with the applied magnetic field strength within the 30–400 mT range. A magnetic
field-induced change of light transmittance occurred and a precipitation of all studied samples was obtained.
Optical investigations of ferrofluid suspensions revealed that, contrary to the linear aggregates of colloidal
CoFe2O4 and FeFe2O4, spheroidal aggregates were formed in the case of MgFe2O4. In all three cases, the surface
modification resulted in decreased dipole–dipole interactions between ferrite cores, and thus, less precipitates
were noticed. All oleate-coated nanoparticles have demonstrated weaker magnetic responses compared to the
citrate-encapsulated samples. The aggregation of nanoparticles potentially increases cytotoxicity. Regarding
non-linear clustering of MgFe2O4 suspensions, it can be concluded that its excretion from the organism may
likely be easier and faster when used in diagnosis and/or therapy. Therefore, more attention should be paid to
the lowly toxic MgFe2O4 regarding its medical application.",
publisher = "Elsevier",
journal = "Optical Materials",
title = "Optical evidence of magnetic field-induced ferrofluid aggregation: Comparison of cobalt ferrite, magnetite, and magnesium ferrite",
volume = "91",
pages = "279-285",
doi = "10.1016/j.optmat.2019.03.031"
}
