Hydrogen adsorption on alkali metal surfaces: Wetting, prewetting and triple-point wetting

G. Mistura, H. C. Lee, M. H.W. Chan

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Abstract

We report the results of a quartz microbalance study of the multilayer adsorption of H2 and D2 on sodium and on rubidium. On sodium H2 and D2 display the well known phenomenon of triple-point wetting. Interestingly low temperature adsorption isotherms of H2 on the evaporated Na surface show sharp layering transitions. On rubidium a weaker substrate H2 and D2 undergo a wetting transition in the liquid phase followed by sharp presetting transitions away from liquid-vapor coexistence. The prewetting phase diagram of H2 on Rb has been quantitatively mapped out.

Original languageEnglish (US)
Pages (from-to)221-244
Number of pages24
JournalJournal of Low Temperature Physics
Volume96
Issue number5-6
DOIs
StatePublished - Sep 1 1994

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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