Effect of composition on the penetration of inert gases adsorbed onto silicate glass surfaces

A. E. Kohler, Steve Garofalini

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Molecular dynamics (MD) computer simulations were used to study the adsorption of inert gases (N2, Ar, Ne) onto glass surfaces. There were four types of surfaces used: silica, sodium trisilicate, sodium disilicate, and sodium aluminosilicate. Unlike the results seen previously in the deposition of metals onto these surfaces, it was found that the inert gas adsorbates had little or no effect on the substrate structure during the adsorption. However the structure of the glasses dramatically altered the adsorption behavior from point to point along the surface for all of the adsorbates. Nitrogen and argon were found to be unable to penetrate the glass surfaces. Individual neon atoms were able to penetrate all of the surfaces except for the sodium aluminosilicate. The reasons for the difference in adsorption behavior are discussed in terms of the compositional effects on the structure of the glasses.

Original languageEnglish
Pages (from-to)4664-4669
Number of pages6
Issue number12
Publication statusPublished - Dec 1994


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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