Figure 1.

Our separation chip has three types of channel: (i) a main straight channel, (ii) curve channels, and (iii) suction channels. The main straight channel has the inertial migration to move the cells into different equilibrium regions. The curve channels (with the close-up view in the inset) push the white blood cells (WBCs) toward the outer part while the red blood cells (RBCs) move toward the inner part. The suction channel allows the RBCs to be sucked away. Note: the main dimensions of the microchannels used in this work are: W = 200 μm, H = 58 or 85 μm, radius of curvature = 100 μm, and W (suction) = 7 μm.