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Selective release of the magnetically trapped diamagnetic particles in ferrofluid flow through a T-shaped microchannel at a volume flow rate of 95 μl/h: (a) and (b) the top-view snapshot and composite particle images; (c) the numerically predicted trajectories of diamagnetic (red) and magnetic (green) particles in the horizontal plane; (d) the isomeric view of the predicted 3D particle trajectories. The block arrows in (a) indicate the flow directions.
