A channel Brownian pump powered by an unbiased external force

被引：48

作者：

Ai, Bao-Quan ^{[1
,2
]}

Liu, Liang-Gang ^{[3
]}

机构：

[1] S China Normal Univ, Sch Phys & Telecommun Engn, Inst Condensed Matter Phys, Guangzhou 510006, Peoples R China

[2] S China Normal Univ, Lab Photon Informat Technol, Guangzhou 510006, Peoples R China

[3] Macau Univ Sci & Technol, Fac Informat Technol, Macau, Peoples R China

来源：

JOURNAL OF CHEMICAL PHYSICS | 2008年 / 128卷 / 02期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2813420

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：

A Brownian pump of particles in an asymmetric finite tube is investigated in the presence of an unbiased external force. The pumping system is bounded by two particle reservoirs. It is found that the particles can be pumped through the tube from a reservoir at low concentration to one at the same or higher concentration. There exists an optimized value of temperature (or the amplitude of the external force) at which the pumping capacity takes its maximum value. The pumping capacity decreases with increasing radius at the bottleneck of the tube. (c) 2008 American Institute of Physics.

引用

页数：5

共 25 条

[1] Current in a three-dimensional periodic tube with unbiased forces [J].

Ai, Bao-quan ;

Liu, Liang-gang .

PHYSICAL REVIEW E, 2006, 74 (05)

[2] Phase shift induces currents in a periodic tube [J].

Ai, Bao-Quan ;

Liu, Liang-Gang .

JOURNAL OF CHEMICAL PHYSICS, 2007, 126 (20)

[3] Brownian motors [J].

Astumian, RD ;

Hänggi, P .

PHYSICS TODAY, 2002, 55 (11) :33-39

[4] Towards a chemically driven molecular electron pump [J].

Astumian, RD ;

Derényi, I .

PHYSICAL REVIEW LETTERS, 2001, 86 (17) :3859-3862

[5] Diffusion in a tube of varying cross section: Numerical study of reduction to effective one-dimensional description [J].

Berezhkovskii, A. M. ;

Pustovoit, M. A. ;

Bezrukov, S. M. .

JOURNAL OF CHEMICAL PHYSICS, 2007, 126 (13)

[6] Cellular and molecular biology of the aquaporin water channels [J].

Borgnia, M ;

Nielsen, S ;

Engel, A ;

Agre, P .

ANNUAL REVIEW OF BIOCHEMISTRY, 1999, 68 :425-458

[7]

Feynman R.P., 1963, FEYNMAN LECT PHYS, V1

[8] Brownian motors [J].

Hänggi, P ;

Marchesoni, F ;

Nori, F .

ANNALEN DER PHYSIK, 2005, 14 (1-3) :51-70

[9] Corrections to the Fick-Jacobs equation [J].

Kalinay, P. ;

Percus, J. K. .

PHYSICAL REVIEW E, 2006, 74 (04)

[10] Fluctuation-driven molecular transport through an asymmetric membrane channel [J].

Kosztin, I ;

Schulten, K .

PHYSICAL REVIEW LETTERS, 2004, 93 (23)

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