Berlin 2018 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 39: Wetting, Microfluidics and Confined Liquids I (joint session CPP/DY)

DY 39.11: Talk

Wednesday, March 14, 2018, 12:30–12:45, C 264

Reversible smectic layer buckling of a ferroelectric liquid crystal confined in anodic aluminium oxide nanochannels — •Mark Busch¹, Andriy V. Kityk^2,1, Tommy Hofmann³, Dirk Wallacher³, and Patrick Huber¹ — ¹TU Hamburg-Harburg, Hamburg, Germany — ²Czestochowa University of Technology, Czestochowa, Poland — ³Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany

The temperature-dependent structural and electro-optical properties of the ferroelectric liquid crystal 2MBOCBC inside the confining cylindrical nanochannels of anodic aluminium oxide are investigated.[1] The channel walls of the 42 nm diameter pores are coated with a polymer to enforce a planar anchoring of this chiral mesogens. By means of neutron diffraction a fully reversible temperature-dependent smectic C* layer buckling towards a symmetric chevron-like structure is found. The formation of this structure coincides with a dramatic decrease in the linear electro-optical response, being explained by the aforementioned structural rearrangement.

[1] Busch et al., Nanoscale (2017), DOI: 10.1039/C7NR07273B