Fig. 5. Trapping modes of the micro-scaled PS beads. (A) Structure of crystals: (a1) 10 μm PS beads,124 (a2) 2 μm PS beads,126 and (a3) 2 μm PS beads by iDEP.130. (B) Structure of chains: (b1) 10 μm PS beads in the ratchet microchannel,136 (b2) 10 μm PS beads in a combined acoustic DEP system,70 and (b3) 18 μm PS beads in the curved microchannel.138 (C) (c1) Structure of wires: 10 μm PS beads in X-patterned insulating structures.140 (c2) Structure of arrays: 10 μm PS beads in the cello-type mechanical trap.132.
