Biaxial layering transition of hard rodlike particles in narrow slitlike pores

Hamdollah Salehi, Sakine Mizani, Roohollah Aliabadi, S. Varga

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Abstract

The phase behavior of hard rectangular rods with edge lengths L, D, and D is studied in a narrow slitlike pore using the Parsons-Lee density functional theory. Using the restricted orientation approximation, we find strong adsorption at the walls with planar ordering, second order uniaxial-biaxial ordering transitions, and first order layering transitions. The layering transition takes place between two fluids having n and n+1 layers, where the layer spacing is on the order of D. In the case of weak shape anisotropy (L/D=3), the coexisting fluids can be either uniaxial or biaxial, while both phases are found to be biaxial for L/D=6 and L/D=9. Interestingly, even two or more layering transitions can be observed with increasing density at a given shape anisotropy and pore width.

Original languageEnglish
Article number032703
JournalPhysical Review E
Volume98
Issue number3
DOIs
Publication statusPublished - Sep 7 2018

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ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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