Tracking three-phase coexistences in binary mixtures of hard plates and spheres

Roohollah Aliabadi, Mahmood Moradi, S. Varga

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The stability of demixing phase transition in binary mixtures of hard plates (with thickness L and diameter D) and hard spheres (with diameter σ) is studied by means of Parsons-Lee theory. The isotropic-isotropic demixing, which is found in mixtures of large spheres and small plates, is very likely to be pre-empted by crystallization. In contrast, the nematic-nematic demixing, which is obtained in mixtures of large plates and small spheres, can be stabilized at low diameter ratios (σ/D) and aspect ratios (L/D). At intermediate values of σ/D, where the sizes of the components are similar, neither the isotropic-isotropic nor the nematic-nematic demixing can be stabilized, but a very strong fractionation takes place between a plate rich nematic and a sphere rich isotropic phases. Our results show that the excluded volume interactions are capable alone to explain the experimental observation of the nematic-nematic demixing, but they fail in the description of isotropic-isotropic one [M. Chen et al., Soft Matter 11, 5775 (2015)].

Original languageEnglish
Article number074902
JournalThe Journal of Chemical Physics
Volume144
Issue number7
DOIs
Publication statusPublished - Feb 21 2016

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Binary mixtures
binary mixtures
Fractionation
Crystallization
fractionation
aspect ratio
Aspect ratio
Phase transitions
crystallization
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Tracking three-phase coexistences in binary mixtures of hard plates and spheres. / Aliabadi, Roohollah; Moradi, Mahmood; Varga, S.

In: The Journal of Chemical Physics, Vol. 144, No. 7, 074902, 21.02.2016.

Research output: Contribution to journalArticle

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