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Discotic columnar liquid crystal studied in the bulk and nanoconfined states by molecular dynamics simulation
Ist Teil von
The Journal of chemical physics, 2014-10, Vol.141 (13), p.134902-134902
Ort / Verlag
United States: American Institute of Physics
Erscheinungsjahr
2014
Link zum Volltext
Quelle
American Institute of Physics
Beschreibungen/Notizen
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.