Dynamics and metastable surface structure of double atomic layer
of water molecules and ions at the interface between KBr(c) and water
K. Ichikawa, S. Sato, and N. Shimomura
Graduate School of Environmental Earth Science, Hokkaido
University, Sapporo 060-0810, Japan
Abstract:
The metastable surface structure and dynamics of water molecules,
cations, and anions at the interface between KBr(001) and water have
been demonstrated from the images in situ observed in atomic resolution
using atomic force microscopy. The vertical motion of potassium ions,
which means their own transfer from the equilibrium sites to the upper
height right on the underlying bromide ions, has been observed at the
interface. They are used to be located in some steady state stabilized
by their interaction with water molecules in the double atomic layer
at the interface. The observed water molecules bridge two bromide ions
by hydrogen bond; the water molecules are sandwiched by the potassium
ions and vice versa.
*Lecture presented at the European Molecular Liquids
Group (EMLG) Annual Meeting on the Physical Chemistry of Liquids: Novel
Approaches to the Structure, Dynamics of Liquids: Experiments, Theories,
and Simulation,Rhodes, Greece, 7-15 September 2002. Other presentations
are published in this issue, pp. 1-261.
Page last modified 2 March 2004.
Copyright © 2004 International Union of Pure and Applied Chemistry.
Questions or comments about IUPAC, please contact, the Secretariat.
Questions regarding the website, please contact web
manager.
