Figure 1.

Simplified schematic showing the capture of paramagnetic beads using HGMS by a single matrix wire. An external magnetic field is applied (red horizontal arrow) to magnetize a ferromagnetic matrix. When a paramagnetic bead suspension flows through a magnetized matrix (blue vertical arrow), the high-gradient magnetic field around the wire strands in the matrix (red dashed line) creates a magnetic force on the beads that dominate over the viscous drag force in the region near the matrix, favoring bead capture on the wire surface.