Crowding effects in non-equilibrium transport through nano-channels

Details Crowding effects in non-equilibrium transport through nano-channels Crowding effects in non-equilibrium transport through nano-channels

2010-07-15

arxiv.org/abs/1007.2473v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

Transport through nano-channels plays an important role in many biological processes and industrial applications. Gaining insights into the functioning of biological transport processes and the design of man-made nano-devices requires an understanding of the basic physics of such transport. A simple exclusion process has proven to be very useful in ex- plaining the properties of several artificial and biological nano-channels. It is particularly useful for modeling the influence of inter-particle interactions on transport characteristics. In this paper, we explore several models of the exclusion process using a mean field approach and computer simulations. We examine the effects of crowding inside the channel and its immediate vicinity on the mean flux and the transport times of single molecules. Finally, we discuss the robustness of the theory's predictions with respect to the crucial characteristics of the hindered diffusion in nano-channels that need to be included in the model.

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