Fig. 6

Trajectories of fluorescent particles inside a micropillar array: (a) Comparison of flow images for 1-µm and 2-µm particles at the same position in the array, (b) flow patterns of 0.5-µm particles alone versus a mixed sample of 0.5-µm and 2-µm particles at the outlet, (c) flow images of 2-µm particles at different positions from upstream to downstream, showing progressive lateral displacement.