Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: Poster: Interfaces and Thin Films

CPP 19.2: Poster

Dienstag, 15. März 2011, 18:00–20:00, P2

Strong segregation limit of a diblock copolymer film in an electric field — •Michael Harrach, Barbara Drossel, Marianne Heckmann, and Tiago de Paula Peixoto — Institut für Festkörperphysik, TU Darmstadt

We present an algorithm to evaluate the free energy of a thin film of diblock copolymers in an electric field at low temperatures. We apply the strong-segregation limit, where only one type of monomer is present in each domain. We assign different dielectric constants to the two types of domains. We consider a two-dimensional system, assuming translational invariance in the third dimension, and periodic boundary conditions in the direction parallel to the condensator plates, between which the polymer film is confined. We evaluate the different contributions to the free energy for different types of phases, with the goal to find the phase with the lowest free energy as a function of the film thickness and the applied electric field.