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


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.


Physical Chemistry Evaporation Inorganic Chemistry Liquid Phase Phase Boundary 
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  1. 1.
    R. EVANS, U. MARINI BETTOLO MARCONI, J. Chem. Phys., 86 (1987) 7138.Google Scholar
  2. 2.
    E. M. PIOTROVSKAYA, N. A. SMIRNOVA, L. V. YAKOVLEV, Vestnik Leningradskogo Universiteta Seriya fizika khimiya, No. 1 (1988) 41.Google Scholar
  3. 3.
    Z. TAN, F. VAN SWOL, K. E. GUBBINS, Molecular Phys., 62 (1987) No. 5, 1213.Google Scholar
  4. 4.
    A. CHAKRABARTI, Phys. Rev. Lett., 69 (1992) 1548.PubMedGoogle Scholar
  5. 5.
    L. MONETTE, A. J. LIU, G. S. GREST, Phys. Rev., A46 (1992) 7664.Google Scholar
  6. 6.
    H. TANAKA, Phys. Rev. Lett., 70 (1993) 53.PubMedGoogle Scholar
  7. 7.
    M. Y. LIN, S. K. SINHA, J. M. DRAKE, X. WU, P. THIYAGARAJAN, H. B. STANLEY, Phys. Rev. Lett., 72 (1994) 2207.PubMedGoogle Scholar
  8. 8.
    Positron and Positronium Chemistry, D. M. SCHRADER and Y. JEAN (Eds), Elsevier, New York, 1988.Google Scholar
  9. 9.
    N. J. WILKINSON, Ph.D. Thesis, University of Bristol. 1994.Google Scholar
  10. 10.
    Corning Reference Data Sheet for Porous VYCOR 7930.Google Scholar
  11. 11.
    V. G. FASTOVSKII, Y. V. PETROVSKII, V. YU, Zh, Fiz. Khim., 30 (1956b) 76.Google Scholar
  12. 12.
    See e.g., M. A. ALAM, H. M.FRETWELL, J.A. DUFFY, A. P. CLARKE, S. B. DUGDALE, in this Proceedings.Google Scholar
  13. 13.
    N. J. WILKINSON, M. A. ALAM, J. M. CLAYTON, R. EVANS, H. M. FRETWELL, S. GUSMAR, Phys. Rev. Lett., 69 (1992) 3535.PubMedGoogle Scholar
  14. 14.
    P. C. BALL, R. EVANS, Langmuir, 5 (1989) 714.Google Scholar
  15. 15.
    J. C. LI, D. K. ROSS, M. J. BENHAM, J. Appl. Cryst., 24 (1991) 794.Google Scholar

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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