Journal of Radioanalytical and Nuclear Chemistry

, Volume 211, Issue 1, pp 165–171 | Cite as

Adsorption and desorption of binary mixtures in confined geometry: A pilot positron annihilation study

  • A. P. Clarke
  • M. A. Alam
  • H. M. Fretwell
  • J. A. Duffy
Contributed Papers
  • 37 Downloads

Abstract

In confined (nanometer-scale) geometry, the effects of substrate forces and finite size produce a shift of the gas ⇔ liquid phase boundary from that found in corresponding bulk. The pore transitions also show marked hysteresis. The phase behaviour of a binary gas mixture in confined geometry is likely to depend on the miscibility of the system and the interaction between the substrate and the individual fluid molecules/atoms. Here, we present the results of a pilot positronium annihilation study of the condensation and evaporation of argon-nitrogen mixtures confined in ∼4 nm diameter cylindrical pores in VYCOR glass.

Keywords

Physical Chemistry Evaporation Inorganic Chemistry Liquid Phase Phase Boundary 

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Copyright information

© Akadémiai Kiadó 1996

Authors and Affiliations

  • A. P. Clarke
    • 1
  • M. A. Alam
    • 1
  • H. M. Fretwell
    • 1
  • J. A. Duffy
    • 2
  1. 1.H. H. Wills Physics LaboratoryUniversity of BristolBristol(UK)
  2. 2.Institut fürr Nukleare Festkörperphysik, Fakultät LRTUniversität der Bundeswehr MünchenNeubiberg(Germany)

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