Considering various potential applications of charged nanochannels, we studied theoretically the electric field driven ion transport in a conical nanochannel connecting two large, identical reservoirs filled with an aqueous KCl solution. Taking account of the effect of electroosmotic flow (EOF), the associated electrokinetic behaviors under various conditions are examined, focusing on the influences of the temperature and the bulk salt concentration on the degree of ionic current rectification (ICR) and the conductance. Assuming that the bulk salt concentration ranges from 1 to 1000 mM and temperature from 278 to 313 K, we show that neglecting the EOF effect will either underestimate or overestimate the ionic current, and can lead to ca. 90% deviation in the degree of ICR. In general, the higher the temperature the greater the conductance and the less significant the ICR effect, and the degree of this effect has a local maximum as the bulk salt concentration varies. A three dimensional plot correlating the ICR effect with the bulk salt concentration and the temperature is prepared for the design of the nanochannel-based thermal gates for ionic transport.

考虑到带电纳米通道的各种潜在应用，我们从理论上研究了在锥形纳米通道中由电场驱动的离子传输，该锥形纳米通道连接两个装有KCl水溶液的大型相同储层。考虑到电渗流（EOF）的影响，研究了各种条件下的相关电动行为，重点关注温度和总盐浓度对离子电流整流度（ICR）和电导率的影响。假设散装盐浓度范围为1至1000 mM，温度范围为278至313 K，我们表明忽略EOF效应会低估或高估离子电流，并可能导致约50％的离子流。ICR程度偏差90％。通常，温度越高，电导率越大，ICR效应越不显着，并且随着总体盐浓度的变化，这种效应的程度具有局部最大值。为设计用于离子传输的基于纳米通道的热敏门，准备了将ICR效应与盐浓度和温度相关联的三维图。