Figure 4.

Determination of k_eff. (a) Microbead adhesion probability as a function of catch strip size. Curved lines: exponential cumulative distribution functions assuming the k_eff measured in (b). Error bars: 95% confidence interval. ○, 10-µm beads at 67 s⁻¹ with concentrated patterned ligand; Δ, 6-µm beads at 100 s⁻¹ with dilute patterned ligand; ◇, 6-µm beads at 50 s⁻¹ and dilute patterned ligand. (b) Calculation of k_eff. The residence time was calculated by dividing the catch strip size by the average velocity. ○, k_eff = 3.38 s⁻¹, R² = 0.94; Δ, k_eff = 0.31 s⁻¹, R² = 0.84; ◇, k_eff = 0.29 s⁻¹, R² = 0.74.