论文标题
溶剂极化和非均匀离子大小对纳米通道中电动传输的影响
Influence of solvent polarization and non-uniform ionic size on electrokinetic transport in a nanochannel
论文作者
论文摘要
在本文中，我们通过使用平均场理论来研究纳米流体通道中的电渗透转运，该理论涉及不均匀的大小效应和溶剂极化效应。我们目睹在给定的Zeta电位的存在下，离子大小的增强总是会降低电渗透速度，从而增加静电电位的幅度，而与考虑溶剂极化无关。还证明，溶剂极化既可以允许静电电位的幅度和电渗流速度降低。此外，我们发现增加Zeta电势不仅增强了离子尺寸效应，还增加了溶剂极化效应。此外，我们证明降低的散装离子数密度会导致中心线电脑速度的增加。我们将水晶的性能与溶剂为乙基醇的电解质的性质进行了比较。最后，我们研究溶剂极化和离子大小如何影响流势和电动效应。有人强调，本研究可以为控制大量生物和工业应用提供控制纳米流体运输的好方法。
In this paper, we study the electroosmotic transport in a nanofluidic channel by using a mean-field theory accounting for non-uniform size effect and solvent polarization effect. We witness that in the presence of the given zeta potential, an enhancement of ion size invariably lowers the electroosmotic velocity, thereby increasing the magnitude of electrostatic potential, irrespective of considering solvent polarization. It is also proved that solvent polarization allows both the magnitude of electrostatic potential and the electroosmotic velocities to decrease. In addition, we find that increasing zeta potential augments not only ion size effect but also solvent polarization effect. Furthermore, we demonstrate that decreasing bulk ion number density causes an increase in electroosmotic velocity at the centerline. We compare the properties of aqueous electrolytes with those of the electrolytes where solvent is ethylalcohol. Finally, we study how solvent polarization and ionic size affect streaming potential and electroviscous effect. It is emphasized that the present study can provide a good way to control the nanofluidic transport for a plethora of biological and industrial applications.
