The effect of counter-ions on the ion selectivity of potassium and sodium ions in nanopores.

Abstract:

:The ion selective transport plays an important role in the function of cell membranes, and promotes the application of artificial permeable membranes. This phenomenon has been studied in case for different diameters and functional groups of nanopores. In this work, we focus on the effect of anions on cation selectivity, in particular the influence of various halide ions on K+ and Na+ selectivity. We adopted molecular dynamics simulations with non-charged nanopores under constant temperature and uniform concentration. The results show K+-selectivity in the solution with Cl- and Na+-selectivity in the solution with Br- and I-. This selectivity, on the contrary, disappears in the solution with F-. We also investigate the change of the hydration shell of ions and cation-anion interactions between in the bulk region and in the nanopores, which could explain this selective phenomenon.

journal_name

Biomed Mater Eng

authors

Tang D,Kim D

doi

10.3233/BME-130822

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

383-90

issue

1

eissn

0959-2989

issn

1878-3619

pii

72LV854J52265177

journal_volume

24

pub_type

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