Particle trapping efficiency (blue, left) and trapping frequency (red, right) in the 10 μm width channel section at different flow velocities. The error bars in X and Y represent the SEM with sample size of N=68 (v=208±14μm/s), N=84 (v=315±17 μm/s), N=61(v=512±48 μm/s), N=69 (v=736±50μm/s), N=56 (v=1249±49 μm/s), N=127 (v=1411±35 μm/s ), N=69 (v=1580±54 μm/s ) for trapping frequency measurement and N=10 for flow velocity measurement.