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Liquid crystals align liquid crystals

Title
Liquid crystals align liquid crystals
Authors
Shioda T.Okada Y.Chung D.-H.Takanishi Y.Ishikawa K.Park B.Takezoe H.
Ewha Authors
박병주
Issue Date
2002
Journal Title
Japanese Journal of Applied Physics, Part 2: Letters
ISSN
0021-4922JCR Link
Citation
vol. 41, no. 3 A, pp. L266 - L268
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We have investigated the molecular orientation of a liquid crystal (LC), pentylcyanobiphenyl (5CB), evaporated on a rubbed polymer by means of polarized ultraviolet absorption spectroscopy and surface second-harmonic generation. The results unambiguously reveal that the in-plane anisotropy is diminishingly small before the molecules form a monolayer, although films thicker than one monolayer have a finite in-plane anisotropy. This drastic change indicates that LC molecules on rubbed surfaces do not align well without the influence of the intermolecular interaction of LCs. Actually we confirmed that nonliquid-crystalline butylcyanobipheny (4CB) exhibits no orientation on the rubbed polymer surface regardless of thickness.
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자연과학대학 > 물리학전공 > Journal papers
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