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Issue 16, 2011
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Influence of mesoscopic structures on single molecule dynamics in thin smectic liquid crystal films

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Abstract

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 viafluorescence 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.

Graphical abstract: Influence of mesoscopic structures on single molecule dynamics in thin smectic liquid crystal films

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Article information


Submitted
11 Mar 2011
Accepted
01 Jun 2011
First published
12 Jul 2011

Soft Matter, 2011,7, 7431-7440
Article type
Paper

Influence of mesoscopic structures on single molecule dynamics in thin smectic liquid crystal films

B. Schulz, D. Täuber, J. Schuster, T. Baumgärtel and C. von Borczyskowski, Soft Matter, 2011, 7, 7431
DOI: 10.1039/C1SM05434A

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