Busselez, R., Cerclier, C. V., Ndao, M., Ghoufi, A., Lefort, R. & Morineau, D. (2014) Discotic columnar liquid crystal studied in the bulk and nanoconfined states by molecular dynamics simulation. J. Chem. Phys. 141 134902.
Added by: Laurent Cournède (2016-03-10 21:01:55)
|Type de référence: Article
Numéro d'identification (ISBN etc.): 0021-9606
Clé BibTeX: Busselez2014
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Mots-clés: anisotropic systems, biaxial particles, computer-simulation, confinement, gay-berne fluid, phase-behavior, transition
Créateurs: Busselez, Cerclier, Ghoufi, Lefort, Morineau, Ndao
Collection: J. Chem. Phys.
Consultations : 13/486
Indice de consultation : 1%
Indice de popularité : 0.25%
A prototypical Gay Berne discotic liquid crystal was studied by means of molecular dynamics simulations both in the bulk state and under confinement in a nanoporous channel. The phase behavior of the confined system strongly differs from its bulk counterpart: the bulk isotropic-to-columnar transition is replaced by a continuous ordering from a paranematic to a columnar phase. Moreover, a new transition is observed at a lower temperature in the confined state, which corresponds to a reorganization of the intercolumnar order. It reflects the competing effects of pore surface interaction and genuine hexagonal packing of the columns. The translational molecular dynamics in the different phases has been thoroughly studied and discussed in terms of collective relaxation modes, non-Gaussian behavior, and hopping processes. (C) 2014 AIP Publishing LLC.
Added by: Laurent Cournède