Abstract
The ordering process of nematic liquid crystal (LC) during evaporation onto silica substrate was investigated. The optical second-harmonic generation and polarized absorption measurements were employed to determine the orientational order parameters S 1 and S 2. A sudden increase of S 1 was observed during the first layer deposition while S 2 gradually increased. Interestingly, S 1 was nearly constant after the completion of the first layer deposition, while S 2 was similar to that in the first layer deposition. The results suggest that spontaneous orientational ordering process is induced during the first monolayer formation.
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