Figure 2.

Rectification ratio is a function of both electrolyte concentration and pore size. The change in the rectification ratio as a function of electrolyte concentration for four different nanopore sizes obtained (A) experimentally and (B) numerically. Error bars are calculated as the standard error of measurements from a minimum of six nanopores. Representative current–voltage curves for each pore size and electrolyte concentration are shown in Figure S8.