Formation and dynamics of easy orientation axis in magnetic field on PVCN-F surface

• Autorzy: Buluy O. , Reznikov Y. , Slyusarenko K. , Nobili M. , Reshetnyak V.
• Konferencja: International Workshop on Liquid Crystals for Photonic ; (26-28.04.2006 ; Gent, Belgium)
• Języki publikacji: EN

Abstrakty

EN

We describe the experiments on a magnetically-induced drift of the easy axis on a soft surface of photoaligning material fluoro-polyvinyl-cinnamate. We found unexpected partial relaxation of the drift of the easy axis after switching the magnetic field off. This relaxation cannot be explained in a framework of the existing models and requires additional assumptions about the drift process. We propose a model that explains the experimental data suggesting elastic-like behaviour of the polymer fragments during the drift of the easy axis.

Słowa kluczowe

EN

liquid crystal; easy axis; gliding; drift of easy axis; photoalignment

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2006
• Tom: Vol. 14, No. 4
• Strony: 293--297
• Opis fizyczny: Bibliogr. 11 poz.

Twórcy

autor

Buluy O.

autor

Reznikov Y.

autor

Slyusarenko K.

autor

Nobili M.

autor

Reshetnyak V.

• Institute of Physics, National Academy of Sciences of Ukraine, 46 Nauki Str., 03-039 Kyiv, Ukraine

Bibliografia

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• 3. V.P. Vorflusev, H.S. Kitzerow, and V.G. Chigrinov, "Azimuthal surface gliding of a nematic liquid crystal", Appl. Phys. Lett. 70, 3359 (1997).
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• 5. Yu. Kurioz, V. Reshetnyak, and Y. Reznikov, "Orientation of a liquid crystal on a soft photoaligning surface", Mol. Cryst. Liq. Cryst. 375, 535 (2002).
• 6. I. Jnossy and T.I. Kóssa, "Gliding of liquid crystals on soft polymer surfaces", Phys. Rev. E70, 052701 (2004).
• 7. A. Romanenko, I. Pinkevich, V. Reshetnyak, I. Dozov, and D. Stoenescu, "Director reorientation in a cell with time-dependent anchoring due to adsorption/desorption of LC molecules", Mol. Cryst. Liq. Cryst. 422, 173 (2004).
• 8. A. Romanenko, V. Reshetnyak, I. Pinkevich, I. Dozov, and S. Faetti, "Magnetic field induced director reorientation in the nematic cell with time-dependent anchoring due to adsorption/desorption of LC molecules", Mol. Cryst. Liq. Cryst. 439, 1867 (2005).
• 9. O. Buluy, A. Iljin, E. Ouskova, Y. Reznikov, C. Blanc, M. Nobili, and K. Antonova, "Anchoring and gliding of easy axis of 5CB on photoaligning PVCN-F surface", Journ. SID - accepted for publication (2006).
• 10. O. Buluy, I. Gerus, K.R. Ha, D.S. Kim, and Y. Reznikov, "Mechanisms of photoalignment of liquid crystals on polyvinylfluorocinnamate", Proc. IMID'06, accepted for publication.
• 11. E. Ouskova, Y. Reznikov, S.V. Shiyanovskii, L. Su, J.L. West, O.V. Kuksenok, O. Francescangeli, and F. Simoni, "Photo-orientation of liquid crystals due to light-induced desorption and adsorption of dye molecules on an aligning surface", Phys. Rev. E64, 051709 (2001).