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| VOLUME 113 (2021) | ISSUE 4 | PAGE 236 |
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Light-transmitting measurements through starch-coated cobalt ferrite ferrofluids exposed to an external magnetic field
M. Suljagić +, L. Andjelković +, P. Iskrenović *, A. S. Nikolić ×, M. R. Milenković ×
+University of Belgrade-Institute of Chemistry, Technology and Metallurgy, Department of Chemistry, 11000 Belgrade, Republic of Serbia *Faculty of Physics, University of Belgrade, 11000 Belgrade, Serbia ×University of Belgrade, Faculty of Chemistry, 11000 Belgrade, Republic of Serbia
Abstract
The light-transmitting measurements at the 655 nm wavelength were performed through starch-coated cobalt ferrite ferrofluids synthesized by well-established synthetic methods, i.e., coprecipitation, mechanochemical, ultrasonically assisted coprecipitation, microemulsion, and microwave-assisted hydrothermal syntheses, exposed to an external magnetic field of 200-400 mT. The investigated samples can be divided into the two groups. The first is where the samples showed higher rate of agglomeration and sedimentation effects. The group of samples synthesized by microemulsion, microwave-assisted hydrothermal method, and mechanochemical method showed less pronounced rate of chain formation. Such measurements present good method for the preliminary selection of possible magnetic resonance imaging (MRI) contrast agents between differently synthesized ferrite suspensions. |