Collective diffusion model for water permeation through microscopic channels

被引：193

作者：

Zhu, FQ ^{[1
]}

Tajkhorshid, E ^{[1
]}

Schulten, K ^{[1
]}

机构：

[1] Univ Illinois, Beckman Inst, Theoret & Computat Biophys Grp, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.93.224501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Water permeation through nanometric channels, generally a coupled many-body process, is described in this study by a single collective coordinate. A collective diffusion model is proposed in which water movement at equilibrium is characterized as an unbiased diffusion along this coordinate and water transport in the presence of a chemical potential difference is described as one-dimensional diffusion in a linear potential. The model allows one to determine the osmotic permeability of a water channel from equilibrium simulations.

引用

页数：4

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