Fig. 1. Movement of (A) non-magnetized and (B) magnetized microjet engines in a paramagnetic beads suspension. (C) On-the-fly pick-up of paramagnetic beads by magnetized microjets. Scale bar of 50 μm. Conditions: 6% H₂O₂, 1% SDS, beads concentration approximates to 3 × 10⁵ μL^–1.