Dresden 2014 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 6: Posters: Membranes and vesicles
BP 6.8: Poster
Montag, 31. März 2014, 17:30–19:30, P3
Investigation of DPPC-Membranes in the gel phase and its phase transition in Molecular Dynamics Simulations — •Bartosz Kowalik1, Alexander Schlaich1, Emanuel Schneck2, and Roland R. Netz1 — 1Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 2Institut Laue-Langevin, 6 Rue Jules Horowitz, 38000 Grenoble, France
Membranes in gel phases and melting transitions to the liquid phase have become a topic of increasing interest recently. Experiments and computer simulations have revealed sharp phase transitions in many physical quantities, which still are not completely understood. In our work, we investigate such a membrane consisting of dipalmitoylphosphatidylcholine (DPPC) that forms a lipid bilayer in an aqueous surrounding. We perform Molecular Dynamics Simulations, which allow us to look into atomistic detail of such systems.
We examine in detail the thermodynamic phase transition. Also, we investigate the differences in structure, energy and order parameters, especially we present a framework to derive the bending rigidities of membranes from Molecular Dynamics Simulations.