Virtual channels for a dynamically reconfigurable network of flowing magnetic beads

In this paper, we demonstrate virtual channels defined by “walls” of magnetic fields, which can be used to construct a dynamically reconfigurable network of flowing magnetic beads. Magnetized by an external magnet, nickel structures generate magnetic fields that can `hold´ and, therefore, guide/trap magnetic particles. In this study, we exhibit S- and Y-shaped virtual channels which steer magnetic beads smoothly. Comparison on the relation of the bead´s speed versus magnetic flux density between channels with different radii of bending curvature or with different widths is also shown. Lastly, a switchable channel implemented with a bistable mechanism is used to demonstrate the passing and blocking of a bead, proving the feasibility of a dynamically reconfigurable network.