Abstract
Biocompatible magnetic fluids composed of modified nano-sized magnetic iron oxide particles have been prepared. The magnetic particles have been obtained (diameter in the order 2–30 nm) by variations of the concentration of reactants, temperature, operation time and pH conditions as well as the electrolyte concentration. Besides one- or two-step coating processes were used successfully. The adsorption process of the modified dextran was checked by determining adsorption isotherms at room temperature. The results are compared with adsorption behaviour of natural acids and surfactants. The characterization of the magnetic particles by various techniques is described.
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