Magnetophoretic velocity of microorganic droplets adsorbed by dysprosium(III) laurate in water

By using an improved apparatus for the observation of magnetophoresis, the magnetophoretic velocity of 2-fluorotoluene droplets including lauric acid was measured in aqueous dysprosium(III) solution. The magnetophoretic velocity of pure 2-fluorotoluene droplets was proportional to the square of the radius. On the other hand, the velocity of the organic droplets including lauric acid in the dysprosium(III) solution showed a deviation from the square radius relationship, more remarkably in smaller droplets than 2 μm in radius. These results indicated that the dysprosium(III)–laurate complex was formed at the liquid–liquid interface. This study is the first report on the detection of the interfacial complex by the magnetophoresis of the microdroplet.