Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: Poster: Interfaces and Thin Films

CPP 19.5: Poster

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

Structure formation and dynamics of thin liquid crystal (8CB) films depending on the type of substrate — Benjamin Schulz^1,2, •Daniela Täuber¹, and Christian von Borczyskowski¹ — ¹nanoMA, TU-Chemnitz, Institut für Physik — ²now at MPI-DS, Göttingen

Taylor made single dye molecules were used to study structure and dynamics within 220 nm thick liquid crystal films. While the diffusion is strongly heterogeneous for thin 8CB films [1] on Si wafers with native SiOx as well as with 100 nm thermally grown SiOx, the structure of the film differs: On 100 nm SiOx, the liquid crystal self-organizes into focal conic domains [2], while on native SiOx a terraced structure with holes is observed. Using dye molecules which align with the liquid crystal, a correlation between structure and dynamics is shown.

[1] B. Schulz, D. Täuber, F. Friedriszik, H. Graaf, J. Schuster and C. von Borczyskowski: PCCP 12 (2010) 11555

[2] V. Designolle, S. Herminghaus, T. Pfohl, und Ch. Bahr: Langmuir 22 (2006) 363