DIFFUSION PAST AN ENTROPY BARRIER

被引:459
作者
ZWANZIG, R
机构
[1] Laboratory of Chemical Physics, National Institute for Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda
关键词
D O I
10.1021/j100189a004
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Diffusion in a tube or channel of varying cross section has been treated, by Fick and Jacobs, as one-dimensional diffusion past an entropy barrier determined by the tube cross-sectional area or channel width. The Fick-Jacobs diffusion equation is rederived, along with corrections involving the curvature of the tube or channel. On comparison with two exactly solvable examples, the Fick-Jacobs equation appears to be quite reliable as long as the curvature is not too great.
引用
收藏
页码:3926 / 3930
页数:5
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