Fig. 2. Magnetized microjets are capable of selective pick-up of paramagnetic beads (see arrow, dark spots: dynabeads of diameter of 2.7 μm) while diamagnetic beads (see example inside the red circle, SiO2 microparticles with a maximum diameter of 20 μm). A, B and C represent time 0, 2 and 4 s of time frame. Scale bar of 50 μm. Conditions: 6% H2O2, 1% SDS, beads concentration approximates to 3 × 104 μL–1 for the silica beads and 1 × 104 μL–1 dynabeads.
