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Nonlinear Current-voltage Characteristic of the Nanofluidic Pore
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中国科技论文在线
he influence of applied voltage on ionic conductance of a nanofluidic pore with a 3 nm in diameter is investigated with molecular dynamics simulations. Results indicate that, in nanopore, rather being ohmic, the current–voltage relationship is nonlinear. According to our study, the main reason originates from that the applied voltage can influence the ions radial distribution. Near the wall region, the ion mobility is low and the ions can hardly transfer freely. With higher applied voltage, more ions are repelled far away from the wall, experiencing lower viscous force and possessing higher mobility, which causes the nonlinear growth of the ionic current.
Nonlinear Current-voltage Characteristic of the Nanofluidic Pore
中国科技论文在线
