论文标题
水分子簇对水溶液中静电相互作用和电渗透转运的空间作用：平均场接近
Steric effect of water molecule clusters on electrostatic interaction and electroosmotic transport in aqueous electrolytes: a mean-field approach
论文作者
论文摘要
从理论上讲，我们不仅研究了水分子簇对水溶液中两个带电表面之间静电相互作用的尺寸效应，而且还对纳米流体通道中的电渗透转运。使用基于自由能的平均场进近占离子和水分子簇的不同尺寸的均值，我们得出一组耦合方程，以计算带电表面之间的静电和电渗透特性。我们验证水簇的尺寸较小，纳米流体通道中的电渗透转运越强。此外，我们发现水簇的大小增加会导致相似或相对带电的平面表面之间的静电相互作用强度降低。
We theoretically study the size effect of water molecule clusters not only on electrostatic interaction between two charged surfaces in an aqueous electrolyte but also on electroosmotic transport in a nanofluidic channel. Applying a free energy based mean-field approach accounting for different sizes of ions and water molecule clusters, we derive a set of coupled equations to compute electrostatic and electroosmotic properties between charged surfaces. We verify that the smaller the size of a water cluster, the stronger the electroosmotic transport in nanofluidic channels. In addition, we find that an increase in size of a water cluster yields a decrease in electrostatic interaction strength between similar or oppositely charged planar surfaces.
