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DRIVEN DIFFUSION IN A PERIODICALLY COMPARTMENTALIZED TUBE: HOMOGENEITY VERSUS INTERMITTENCY OF PARTICLE MOTIONстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 3 мая 2017 г.
- Авторы: Makhnovskii Yu A., Berezhkovskii A.M., Bogachev L.V., Zitserman V.Yu
- Журнал: Journal of Physical Chemistry B
- Том: 115
- Номер: 14
- Год издания: 2011
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 3992
- Последняя страница: 4002
- DOI: 10.1021/jp112393q
- Аннотация: We study the effect of a driving force F on drift and diffusion of a point Brownian particle in a tube formed by identical cylindrical compartments, which create periodic entropy barriers for the particle motion along the tube axis. The particle transport exhibits striking features: the effective mobility monotonically decreases with increasing F, and the effective diffusivity diverges as Ff¥, which indicates that the entropic effects in diffusive transport are enhanced by the driving force. Our consideration is based on two different scenarios of the particle motion at small and large F, homogeneous and intermittent, respectively. The scenarios are deduced from the careful analysis of statistics of the particle transition times between neighboring openings. From this qualitative picture, the limiting small-F and large-F behaviors of the effective mobility and diffusivity are derived analytically. Brownian dynamics simulations are used to find these quantities at intermediate values of the driving force for various compartment lengths and opening radii. This work shows that the driving force may lead to qualitatively different anomalous transport features, depending on the geometry design.
- Добавил в систему: Махновский Юрий Абрамович
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