Investigation of the adsorption behaviour of acetone at the surface of ice. A grand canonical Monte Carlo simulation study

György Hantal, Pál Jedlovszky, Paul N.M. Hoang, Sylvain Picaud

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The adsorption isotherm of acetone at the surface of Ih ice has been determined by a set of grand canonical Monte Carlo simulations at 200 K, by varying the chemical potential of acetone in the simulations. The obtained isotherm can be described by the Langmuir theory up to a certain relative pressure value (i.e., about 0.07); above which the isotherm increasingly deviates from the Langmuir form. This deviation mainly originates from the increasing importance of the lateral dipolar interactions. Further, above this pressure the adsorption sites are no longer equivalent: the adsorbed acetone molecules are aligned in three different ways. In one of these orientations the acetone molecule forms two, while in another one it forms one hydrogen bond with the surface waters, whereas in the third preferred orientation no hydrogen bonding occurs between the adsorbed molecule and the ice surface.

Original languageEnglish
Pages (from-to)6369-6380
Number of pages12
JournalPhysical Chemistry Chemical Physics
Volume10
Issue number42
DOIs
Publication statusPublished - Nov 6 2008

ASJC Scopus subject areas

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

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