Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/96385
Title: | Entropically-induced asymmetric passage times of charged tracers across corrugated channels |
Author: | Malgaretti, Paolo Pagonabarraga Mora, Ignacio Rubí Capaceti, José Miguel |
Keywords: | Difusió Electròlits Equacions Diffusion Electrolytes Equations |
Issue Date: | 15-Jan-2016 |
Publisher: | American Institute of Physics |
Abstract: | We analyze the diffusion of charged and neutral tracers suspended in an electrolyte embedded in a channel of varying cross section. Making use of systematic approximations, the diffusion equation governing the motion of tracers is mapped into an effective 1D equation describing the dynamics along the longitudinal axis of the channel where its varying-section is encoded as an effective entropic potential. This simplified approach allows us to characterize tracer diffusion under generic confinement by measuring their mean first passage time (MFPT). In particular, we show that the interplay between geometrical confinement and electrostatic interactions strongly affect the MFTP of tracers across corrugated channels hence leading to alternative means to control tracers translocation across charged pores. Finally, our results show that the MFPTs of a charged tracer in opposite directions along an asymmetric channel may differ We expect our results to be relevant for biological as well synthetic devices whose dynamics is controlled by the detection of diluted tracers |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1063/1.4939799 |
It is part of: | Journal of Chemical Physics, 2016, vol. 144, p. 034901 |
URI: | http://hdl.handle.net/2445/96385 |
Related resource: | http://dx.doi.org/10.1063/1.4939799 |
ISSN: | 0021-9606 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
657784.pdf | 676.08 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.