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Finite size effects on the phase diagram of a binary mixture confined between competing walls

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  • Müller, M
  • Binder, K
  • Albano, E.V

Abstract

A symmetrical binary mixture AB that exhibits a critical temperature Tcb of phase separation into an A- and a B-rich phase in the bulk is considered in a geometry confined between two parallel plates a distance D apart. It is assumed that one wall preferentially attracts A while the other wall preferentially attracts B with the same strength (“competing walls”). In the limit D→∞, one then may have a wetting transition of first-order at a temperature Tw, from which prewetting lines extend into the one phase region both of the A- and the B-rich phase. It is discussed how this phase diagram gets distorted due to the finiteness of D: the phase transition at Tcb immediately disappears for D<∞ due to finite size rounding, and the phase diagram instead exhibit two two-phase coexistence regions in a temperature range Ttrip

Suggested Citation

  • Müller, M & Binder, K & Albano, E.V, 2000. "Finite size effects on the phase diagram of a binary mixture confined between competing walls," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 279(1), pages 188-194.
    • Handle: RePEc:eee:phsmap:v:279:y:2000:i:1:p:188-194
    DOI: 10.1016/S0378-4371(99)00525-7
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    Cited by:

    1. Trojan, K & Ausloos, M, 2003. "Magnetically controlled ballistic deposition. A model of polydisperse granular packing," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 326(3), pages 492-510.

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