Molecular Theory for Electrokinetic Transport in pH-Regulated Nanochannels
详细信息 查看全文
- 作者：Xian Kong ; Jian Jiang ; Diannan Lu ; Zheng Liu ; Jianzhong Wu
- 刊名：The Journal of Physical Chemistry Letters
- 出版年：2014
- 出版时间：September 4, 2014
- 年：2014
- 卷：5
- 期：17
- 页码：3015-3020
- 全文大小：315K
- ISSN：1948-7185
文摘
Ion transport through nanochannels depends on various external driving forces as well as the structural and hydrodynamic inhomogeneity of the confined fluid inside of the pore. Conventional models of electrokinetic transport neglect the discrete nature of ionic species and electrostatic correlations important at the boundary and often lead to inconsistent predictions of the surface potential and the surface charge density. Here, we demonstrate that the electrokinetic phenomena can be successfully described by the classical density functional theory in conjunction with the Navier鈥揝tokes equation for the fluid flow. The new theoretical procedure predicts ion conductivity in various pH-regulated nanochannels under different driving forces, in excellent agreement with experimental data.