Faculty of Mechanical Engineering, Micro- and Nanofluidics Laboratory, Technion-Israel Institute of Technology , Technion City 32000, Israel.
Nano Lett. 2016 Apr 13;16(4):2744-8. doi: 10.1021/acs.nanolett.6b00429. Epub 2016 Mar 15.
Current nanochannel system paradigm commonly neglects the role of the interfacing microchannels and assumes that the ohmic electrical response of a microchannel-nanochannel system is solely determined by the geometric properties of the nanochannel. In this work, we demonstrate that the overall response is determined by the interplay between the nanochannel resistance and various microchannel attributed resistances. Our experiments confirm a recent theoretical prediction that in contrast to what was previously assumed at very low concentrations the role of the interfacing microchannels on the overall resistance becomes increasingly important. We argue that the current nanochannel-dominated conductance paradigm can be replaced with a more correct and intuitive microchannel-nanochannel-resistance-model-based paradigm.
目前的纳米通道系统范式通常忽略了界面微通道的作用，并假设微通道-纳米通道系统的欧姆电响应仅由纳米通道的几何特性决定。在这项工作中，我们证明了整体响应是由纳米通道电阻和各种微通道归因电阻之间的相互作用决定的。我们的实验证实了最近的理论预测，即在非常低的浓度下与之前的假设相反，界面微通道对整体电阻的作用变得越来越重要。我们认为，目前以纳米通道为主导的电导范式可以被更正确和直观的基于微通道-纳米通道-电阻模型的范式所取代。
