Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 43: Poster: The Physics of Water Interactions with Biological Matter
CPP 43.8: Poster
Mittwoch, 9. März 2016, 18:15–21:00, Poster B2
Landau-Ginzburg theory for indirect membrane interactions — •Alexander Schlaich1, Jan Daldrop1, Bartosz Kowalik1, Matej Kanduč1,2, Emanuel Schneck3, and Roland R. Netz1 — 1Fachbereich Physik, Freie Universiät Berlin, 14195 Berlin, Germany — 2Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin, 14109 Berlin, Germany — 3Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, 14476 Potsdam, Germany
Hydrophilic interfaces, such as planar lipid membranes, show overwhelming repulsive behavior at nanometer separations in aqueous solution that is not captured within classical continuum theories. It is common consensus that the atomistic degrees of freedom need to be considered explicitly. Marcelja and Radic were the first to propose that water orientation causes a significant contribution to the interaction free energy.
Using field-theoretical modeling, we derive the phenomenological interaction parameters for a Landau-Ginzburg model and show that employing the water dipole orientation we can quantitatively describe the indirect interaction between surfaces, i.e. the contribution of water acting on a single surface.