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Quenched-annealed density functional theory for interfacial behavior of hard rods at a hard rod matrix

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Cheung, David L. and Schmidt, M. (Matthias) (2009) Quenched-annealed density functional theory for interfacial behavior of hard rods at a hard rod matrix. Journal of Chemical Physics, Vol.131 (No.21). p. 214705. doi:10.1063/1.3267728 ISSN 0021-9606.

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Official URL: http://dx.doi.org/10.1063/1.3267728

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Abstract

We consider a system of mobile hard rods that are immersed in an isotropic matrix of hard rods with quenched positions and orientations. Using quenched-annealed density functional theory the disorder-averaged excess free energy functional is approximated by an Onsager second virial form, which is valid in the limit of large length-to-thickness aspect ratio of the particles. We find that inside the bulk isotropic matrices the isotropic-nematic phase transition occurs at higher values of the chemical potential than in the pure system, shifted proportionally to the product of the matrix density and the matrix-fluid excluded volume. We investigate adsorption and penetration behavior of the annealed rods at the planar surface of a porous rod matrix, considering both perpendicular and parallel boundary conditions of the nematic director far from the surface. (C) 2009 American Institute of Physics. [doi:10.1063/1.3267728]

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Science, Engineering and Medicine > Science > Chemistry
Library of Congress Subject Headings (LCSH): Density functionals, Interfaces (Physical sciences), Thermodynamics, Nematic liquid crystals, Phase transformations (Statistical physics)
Journal or Publication Title: Journal of Chemical Physics
Publisher: American Institute of Physics
ISSN: 0021-9606
Official Date: 7 December 2009
Dates:
DateEvent
7 December 2009Published
Volume: Vol.131
Number: No.21
Number of Pages: 7
Page Range: p. 214705
DOI: 10.1063/1.3267728
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Engineering and Physical Sciences Research Council (EPSRC), Hewlett-Packard Laboratories

Data sourced from Thomson Reuters' Web of Knowledge

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