Entropy-driven pumping in zeolites and biological channels

被引:129
|
作者
Chou, T
Lohse, D
机构
[1] Univ Cambridge, Dept Physiol, Cambridge CB3 9EW, England
[2] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 9EW, England
[3] Univ Twente, Dept Appl Phys, NL-7500 AE Enschede, Netherlands
[4] Univ Twente, JM Burgers Ctr Fluid Mech, NL-7500 AE Enschede, Netherlands
关键词
D O I
10.1103/PhysRevLett.82.3552
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We simulate constrained dynamics of two species transport across single-file molecular-sized pol es such as biomembrane channels and zeolites. We focus on diffusional pumping where one type of particle uses its entropy of mixing to drive another along its chemical potential gradient. Quantitative analyses of rates and efficiencies of transport are plotted as functions of transmembrane potential, pore length, and particle-port interactions. Our results qualitatively explain recent measurements of "negative" osmosis and suggest new, more systematic experiments, particularly with zeolites.
引用
收藏
页码:3552 / 3555
页数:4
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