Inclusions of a two dimensional fluid with competing interactions in a disordered, porous matrix

Cecilia Quijano, Noé G. Almarza, Enrique Lomba, Gerhard Kahl

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The behavior of a fluid with competing interaction ranges adsorbed in a controlled pore size disordered matrix is studied by means of grand canonical Monte Carlo simulations in order to analyze the effects of confinement. The disordered matrix model is constructed from a two-dimensional non-additive hard-sphere fluid (which shows close to its demixing critical point large fluctuations in the concentration), after a subsequent quenching of the particle positions and removal of one of the components. The topology of the porous network is analyzed by means of a Delaunay tessellation procedure. The porous cavities are large enough to allow for cluster formation, which is however somewhat hindered as a result of the confinement, as seen from the comparison of cluster size distributions calculated for the fluid under confinement and in the bulk. The occurrence of lamellar phases is impeded by the disordered nature of the porous network. Analysis of two-dimensional density maps of the adsorbed fluid for given matrix configurations shows that clusters tend to build up in specific locations of the porous matrix, so as to minimize inter-cluster repulsion.

Original languageEnglish (US)
Article number194127
JournalJournal of Physics Condensed Matter
Volume27
Issue number19
DOIs
StatePublished - May 20 2015
Externally publishedYes

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inclusions
Fluids
fluids
matrices
interactions
Pore size
Quenching
critical point
topology
quenching
Topology
occurrences
porosity
cavities
configurations
simulation
Monte Carlo simulation

Keywords

  • adsorption
  • disordered
  • fluids with competing interactions
  • porous matrix

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Inclusions of a two dimensional fluid with competing interactions in a disordered, porous matrix. / Quijano, Cecilia; Almarza, Noé G.; Lomba, Enrique; Kahl, Gerhard.

In: Journal of Physics Condensed Matter, Vol. 27, No. 19, 194127, 20.05.2015.

Research output: Contribution to journalArticle

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