Journal
CHEMICAL PHYSICS LETTERS
Volume 663, Issue -, Pages 33-39Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2016.09.051
Keywords
Ion transport; Electrodiffusion; Ion channel; PNP theory; Time-dependent Nernst-Planck-Poisson equations; Ion current rectification ICR
Funding
- Scientific Grant Agency of the Ministry of Education of Slovak Republic and of Slovak Academy of Sciences [VEGA 1/0633/15]
- Comenius University [UK/274/2015]
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Nanoscale electrodiffusion transport is involved in many electrochemical, technological and biological processes. Developments in computer power and numerical algorithms allow for solving full time dependent Nernst-Planck and Poisson equations without simplifying approximations. We simulate spatio-temporal profiles of concentration and electric potential changes after a potential jump in a 10 nm channel with two cations (with opposite concentration gradients and different mobilities) and one anion (of uniform concentration). The temporal dynamics shows three exponential phases and damped oscillations of the electric potential. Despite the absence of surface charges in the studied model, an asymmetric current-voltage characteristic was observed. (C) 2016 Elsevier B.V. All rights reserved.
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