弱重叠双电层纳米通道中电渗流对纳米通道离子电导的抑制
Suppression of nano-channel ion conductance by electro-osmotic flow in nano-channels with weakly overlapping electrical double layers
摘要：
本研究探讨具有弱重叠双电层之奈米通道之非线性离子电流-电压特性。数值模拟以及1-D数学模型的开发，揭示了电渗流（电渗流）与浓度极化过程的相互作用，并耗尽通道内的离子浓度，从而显着抑制通道电导。在通道内存在再循环涡流的情况下，电导可以在高电偏压下恢复。作为EOF驱动的离子耗尽的结果，确定了一个限制电导的行为，这是本质上不同于经典的限制电流的行为。
英文摘要：
This theoretical study investigates the nonlinear ionic current-voltage characteristics of nano-channels that have weakly overlapping electrical double layers. Numerical simulations as well as a 1-D mathematical model are developed to reveal that the electro-osmotic flow (EOF) interplays with the concentration-polarization process and depletes the ion concentration inside the channels, thus significantly suppressing the channel conductance. The conductance may be restored at high electrical biases in the presence of recirculating vortices within the channels. As a result of the EOF-driven ion depletion, a limiting-conductance behavior is identified, which is intrinsically different from the classical limiting-current behavior.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
