Figure 2.
Microfluidic device schematics and forces acting on the paramagnetic particle in the column. (a) Typical dimensions of the vertical column are: length of 15 mm and diameter of 700 μm. The nickel wire diameter was 69 μm. Trajectory of the paramagnetic particle in the vertical column is determined by the balance of the gravitational force (Fg), drag (FD), buoyancy (Fb), and magnetic force (Fmr, Fmθ). (b) The column is placed vertically in the field generated by four permanent nickel-iron-boron magnets on each side of the column.