▎ 摘　　要

Gating in ion transport is at the center of many vital living-substancetransmission processes, and understanding how gating works at an atomic level is essentialbut intricate. However, our understanding andfinite experimentalfindings of subcontinuumion transport in subnanometer nanopores are still limited, which is out of reach of theclassical continuum nanofluidics. Moreover, the influence of ion density on subcontinuumion transport is poorly understood. Here we report the ion density-dependent dynamicconductance switching process in biomimetic graphene nanopores and explain thephenomenon by a reversible ion absorption mechanism. Our molecular dynamics simulationsdemonstrate that the cations near the graphene nanopore can interact with the surfacecharges on the nanopore, thereby realizing the switching of high- and low-conductancestates. This work has deepened the understanding of gating in ion transport