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Dye adsorption alteration of anchoring properties of planar orienting films

C. DASCALU1,* , C. UNCHESELU2, N. ESEANU1, A. L. ALEXE-IONESCU1

Affiliation

  1. Physics Department, Faculty of Applied Science, University “Politehnica” of Bucharest, 313 Splaiul Independentei, Bucharest, Romania
  2. Physics Department, Technical University of Civil Engineering, 122-124Lacul Tei Boulevard, Bucharest, Romania

Abstract

Planar orienting polymeric films proved to have strong anchoring properties for nematic liquid crystals. Inserting a small quantity of azo-dye in a nematic liquid crystal 5CB changes the anchoring properties due to specific adsorption mechanisms. Measurements have been performed choosing several dye concentrations, cell thicknesses and different dyes. Anchoring strength dependence on the cell thickness has been investigated..

Keywords

Nematic liquid crystal, Azo-dye, Saturation voltage, Unified anchoring strength.

Submitted at: Sept. 25, 2007
Accepted at: Feb. 18, 2008

Citation

C. DASCALU, C. UNCHESELU, N. ESEANU, A. L. ALEXE-IONESCU, Dye adsorption alteration of anchoring properties of planar orienting films, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 363-368 (2008)