Theoretical study for water structure at highly ordered surface

Effect of surface structure

Ryo Akiyama, Fumio Hirata

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The structure of water at an ordered solid surface is investigated by the reference interaction site method (RISM). A RISM equation devised especially for a solute-solvent system in which the solute is a two-dimensional periodic array is employed to formulate the electrode-solution interface. Calculations are carried out for two types of surfaces: flatlike and Au(111)-like structures. The orientation of water molecules at the Au(111)-like surface with various surface charge densities, which are deduced from the correlation functions, is in good agreement with the results of surface-enhanced infrared absorption spectroscopy. On the other hand, the model of the flatlike surface does not give a consistent picture with the experiments. The difference is significant when the walls are negatively charged. In the case of a negatively charged wall, the Au(111)-like model gives about 108° for the angle between the surface normal vector and the two O-H vectors of the water molecules in the first layer, whereas the angles are about 72° and 180° for the flatlike surface. The results demonstrate that the solid surface structure is very important in discussing the structure and orientation of water molecules at the interface.

Original languageEnglish
Pages (from-to)4904-4911
Number of pages8
JournalJournal of Chemical Physics
Volume108
Issue number12
DOIs
Publication statusPublished - Mar 22 1998
Externally publishedYes

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Surface structure
Water
water
solid surfaces
Molecules
solutes
molecules
Infrared absorption
Surface charge
Charge density
Absorption spectroscopy
infrared absorption
Infrared spectroscopy
absorption spectroscopy
infrared spectroscopy
interactions
Electrodes
electrodes
Experiments

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Theoretical study for water structure at highly ordered surface : Effect of surface structure. / Akiyama, Ryo; Hirata, Fumio.

In: Journal of Chemical Physics, Vol. 108, No. 12, 22.03.1998, p. 4904-4911.

Research output: Contribution to journalArticle

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