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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
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 |
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| 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: |
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| 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 |
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