Berlin 2008 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster II

DY 29.62: Poster

Donnerstag, 28. Februar 2008, 16:00–18:00, Poster C

Interactions of colloidal particles with periodically deformed director fields in liquid crystalline free standing films — •Kirsten Harth, Christian Bohley, and Ralf Stannarius — Institut für Experimentelle Physik, Otto-von-Guericke-Universität Magdeburg, D-39106 Magdeburg, Universitätsplatz 2

We investigate textures of ferroelectric and paraelectric free standing liquid crystal films in the smectic C and C^∗ phases by means of polarizing microscopy, with focus on colloidal liquid or solid inclusions. Periodic patterns have been observed around such inclusions and at film thickness steps. The inclusions interact with the director field, forming regular patterns, chains and lattices. An experimental investigation of the interactions between periodic patterns and inclusions is performed and the director field is analysed within an elastic continuum model.