Berlin 2015 – scientific programme
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BP: Fachverband Biologische Physik
BP 24: Posters: Membranes and vesicles
BP 24.15: Poster
Tuesday, March 17, 2015, 14:00–16:00, Poster A
Hydration interaction of charged polar surfaces — •Alexander Schlaich1, Matej Kanduc1, Emanuel Schneck2, and Roland R. Netz1 — 1Fachbereich Physik, Freie Universität Berlin, D-14195 Berlin, Germany — 2Max Planck Institut für Kolloid- und Grenzflächenforschung, D-14476 Potsdam, Germany
We study the hydration interactions between polar surfaces as a model for lipid membranes using atomistic computer simulations at prescribed water chemical potential and analyze interaction pressures, interaction thermodynamics, and interaction mechanisms.
The overlap of interfacial water layers is analyzed via several distinct water order parameters and compared with predictions of simple continuum theories. We further investigate the electrostatic interaction between charged model membrane surfaces in the presence of counter ions and show that continuum models can successfully describe Coulombic interactions. To this end, we also analyze the dielectric properties of the interfacial water and examine the solvation of salt in water under confinement.