Figure 3. Histograms of translocation time for 5.3 k-mer poly(dA) passing through a nanopore.

(a) 50-nm silica bead-coated substrate (N = 175) and (b) 50-nm amine-silica bead-coated substrate (N = 362). Nanopore diameter and membrane thickness in each substrate were 2.0 nm and 20 nm, respectively. Translocation events occurred when the applied voltage was 1 V (low-pass filtered at 5 kHz). Distributions of both substrates were also fitted successfully using log-normal distributions.