Figure 3.
(a) Sequential applications of planar (H//) and perpendicular (HZ) fields transport (indicated by dots) a microsphere on a Si platform along a zigzag wire. (b) Transport of several T-lymphocyte cells along the wires. The cells (dashed circles in top panel) are conjugated to 1 μm magnetic spheres. (c) Trajectory (white dots) of a single T-lymphocyte cell away from the wires and its controlled return to a neighboring vertex on the same wire. The arrows (and dashed circle in first panel) identify the cell. (d) Simultaneous back and forth transport of five fluid borne T-cells between zigzag wire (1) (2) and (3). Dots identify trajectory of five cells.