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Abstract
Planar nematic layers of 5CB oriented by ‘sliding on’ nanolayers of PTFE were studied by electro‐optic methods. Deposited layers were characterized by AFM and spectroscopic ellipsometry. It was found that at 100°C presumably single PTFE chains (4 nm thickness) are deposited. By ellipsometry measurements c. 0.1° pretilt angle of the nematic layer was determined. In planar nematic layers low frequency flexoelectric splay oscillations were excited. An overall 1/f shape of the oscillation spectrum was found in the range 1 to 1000 Hz, giving no evidence of a surface viscosity effect in this range.
Acknowledgements
This study was performed in the framework of a CNR‐BAS joint project. The authors are indebted to M. P. De Santo for AFM characterization and to L. M. Blinov and H. Hinov for helpful discussions.
