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Regensburg 2016 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 33: Ionic Liquids and Water

CPP 33.7: Talk

Wednesday, March 9, 2016, 11:30–11:45, H40

Free interfaces in fluids of Ionic Liquid Crystals — •Hendrik Bartsch1,2, Markus Bier1,2, and Siegfried Dietrich1,21Max Planck Institute for Intelligent Systems, Stuttgart, Germany — 2University of Stuttgart, Germany

Recently, Ionic Liquid Crystals (ILCs) were attracting increasing scientific, as well as technological attention, since they are expected to exhibit unique structural properties, which are directly linked to the interplay of the anisotropy of the molecules, on the one hand, and their charges, on the other hand. Especially in inhomogeneous systems, e.g. fluids close to electrodes or free interfaces between fluid phases, this combination of properties can lead to new structures, which are not observable in ionic liquids or liquid crystals, separately.

Nevertheless, the theoretical understanding of the formation of interfaces in systems of ILCs is still incomplete. In particular, reliable predictions for the density and the nematic order parameter profiles are still rare. In order to address this open question, we study ILCs close to interfaces, by means of density functional theory. First, it will be shown that our approach resembles previous results for the bulk phase diagrams of charged and uncharged liquid crystals [1]. Ultimately, we will present new results on the free interface structure, for the liquid-gas and the smectic-liquid coexistence.


[1] S. Kondrat, M. Bier, and L. Harnau, J. Chem. Phys. 132, 184901 (2010)

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