Fig. 3.

In polystyrene bead separation experiments, the microfluidic obstacle array preferentially deflects large-diameter particles in the target output (ε). Particles with diameters below the threshold diameter demonstrate minimal deflection from the input stream across the length of the device. Particles with diameters near the threshold diameter indicate a minimal degree of device-mediated deflection into output ε. There is a statistically significant difference between the composition of large- and intermediate-diameter particles in output ε (p < 0.05). Note: “< Threshold Diameter” indicates 51nm particles; “≲ Threshold Diameter” indicates 190nm particles; “> Threshold Diameter” indicates 2.01μm particles