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Electrooptic behaviour of a nematic MBBA layer with a thick interfacial surfactant layer
Author(s) -
Hinov H. P.
Publication year - 1987
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170220327
Subject(s) - mbba , liquid crystal , anchoring , pulmonary surfactant , cationic polymerization , layer (electronics) , materials science , molecule , chemistry , chemical physics , composite material , polymer chemistry , organic chemistry , biochemistry , optoelectronics , structural engineering , engineering
The electro‐optic behaviour of MBBA nematic layers with various surfactants added of anionic, cationic, zwitterionic and non‐ionic character and a considerable amount (2wt% to 8 wt%) was studied. The formation of surface‐induced flexoelectric domains in all cases clearly showed that the anchoring of the liquid crystal layers has been weak. Such a weak anchoring can be explained with the formation of a perioidc (in the most simple case sinusoidal) MBBA‐surfactant interface boundary with a mutual penetration of the liquid crystal and surfactant molecules with some gradient.