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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Liquid Crystals

CPP 17.3: Vortrag

Dienstag, 15. März 2011, 14:45–15:00, ZEU 114

Morphological evolution of pi-walls in nematic liquid crystals under microfluidic flow — •Anupam Sengupta, Stephan Herminghaus, and Christian Bahr — MPI-DS, Bunsenstrasse 10, 37073, Goettingen

Microflows of pure nematic liquid phase are studied by the authors using polarizing microscopy and fluouroscence confocal polarizing microscopy.Varying the combinations of surface anchoring, channel dimensions and flow rates, different textures and defect structures evolve: stable, unstable or flow-stabilized. The authors use the forces present when such systems flow through an appropriate microfluidic device to manipulate the structures. Novel colloidal systems dispersed in nematic matrices, can selectively be transported over large length scales, using the nematic bulk or the flow-induced textures and defect structures.