Influence of mesoscopic structures on single molecule dynamics in thin smectic liquid crystal films
| Autor: | Thomas Baumgärtel, Benjamin Schulz, Jörg Schuster, Christian von Borczyskowski, Daniela Täuber |
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| Přispěvatelé: | Publica, Technische Universität Chemnitz, Max Planck Institute for Dynamcis and Self-Organization, Frauenhofer Research Institute for Electronic Nano Systems |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
ddc:539
diffusion liquid crystal 8CB interface single molecule defect structure Mesoscopic physics Materials science Flüssigkristall Diffusion 8CB FCS Grenzfläche Struktur dünner Film General Chemistry Substrate (electronics) Condensed Matter Physics chemistry.chemical_compound Crystallography Dipole Flüssigkristall Diffusion Defekt chemistry Chemical physics Liquid crystal Diimide Molecule Wafer ddc:541 Perylene |
| Zdroj: | Soft Matter, 2011,7, S. 7431-7440 |
| Popis: | Mesoscopic structures in liquids have an impact on the diffusion dynamics of the constituting molecules. Smectic 8CB liquid crystals on silicon wafers show the formation of mesoscopic structures on the μm scale at a film thickness of 200 nm. Depending on the kind of substrate (thermally grown or native SiOx), we observed the formation of focal conic domains (FCDs) and a new type of terraced holes, respectively. Dynamics are described via single perylene diimide tracer molecule tracking of translational diffusion and in the case of FCDs by a combination of translation and rotation detected via fluorescence correlation spectroscopy. Tailoring perylene diimide molecules such that the optical transition dipole moment follows the liquid crystal director allows mapping out FCDs and investigating the dynamics within a single FCD. |
| Databáze: | OpenAIRE |
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