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Phys Rev E Stat Nonlin Soft Matter Phys. 2003 Apr;67(4 Pt 1):041207. Epub 2003 Apr 28.

Phase behavior and dynamics of fluids in mesoporous glasses.

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1
Department of Chemical Engineering, University of Massachusetts, Amherst 01003, USA.

Abstract

Equilibrium and dynamical relaxation behavior of fluids confined in disordered mesoporous glasses such as Vycor are studied based on a lattice model using mean field theory and Monte Carlo simulations. Preferential attractive interactions between the solid surfaces and the fluid suppresses macroscopic phase separation, while making the relaxation rate increasingly slow. The free energy landscape characterized by the presence of the many metastable minima separated by finite barriers dominates both the static and dynamic behavior of fluids at low temperature. Our results provide additional insight into the nature of hysteresis in adsorption measurements of gases in porous glasses.

PMID:
12786353
DOI:
10.1103/PhysRevE.67.041207
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