Molecular Simulation of Ion Transport at the Water/Vapor Interface
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Date
2012-08
Journal Title
Journal ISSN
Volume Title
Publisher
Scientific Research
Abstract
Molecular dynamics was used to quantify the role of the size, charge and polarisability of F–
, Cl–
, Br–
, I–
and Na+
ions in
their distribution in the water/vapour interface system. Our results show that the larger polarizable anions I– and Br–
is
attracted to the surface which is traced back to surface-modified ion hydration, while the F–
was repelled from the interface
and the Cl– occupied the total volume of the water slab. Moreover, by artificially increasing the ions charge,
anions were localized to the center of the water slab. These results demonstrate that the effect of polarizability cannot be
neglected in the transport mechanism.
Description
Keywords
Molecular Dynamics, Ions, Interface, Interaction Potentials, Solvation, Polarization
Citation
Open Journal of Physical Chemistry, 2012, 2, 147-155