NEXAFS Study on Photoalignment of Liquid Crystalline Polymeric Films

Polarization-dependent near-edge X-ray absorption fine structure (NEXAFS) measurement is performed to investigate orientation structures of the near-surface of the reoriented photo-cross-linkable liquid crystalline polymer (PMCB6M) films, which are applicable to liquid crystal (LC) alignment layer....

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Published in:Molecular Crystals and Liquid Crystals 2014-09, Vol.601 (1), p.49-56
Main Authors: Kawatsuki, Nobuhiro, Inada, Yonosuke, Goto, Kohei, Kondo, Mizuho, Haruyama, Yuichi, Matsui, Shinji
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Crystals
Fine structure
LC alignment
Liquid crystal polymers
Liquid crystals
Measurement
NEXAFS
Orientation
Photoalignment
photoinduced orientation
Rings (mathematics)
Spectrum analysis
Surface chemistry
Three dimensional
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description Polarization-dependent near-edge X-ray absorption fine structure (NEXAFS) measurement is performed to investigate orientation structures of the near-surface of the reoriented photo-cross-linkable liquid crystalline polymer (PMCB6M) films, which are applicable to liquid crystal (LC) alignment layer. The 3D orientation parameter at the near-surface of the reoriented PMCB6M film is ∼0.7, which is similar to the results obtained by a polarization absorption spectroscopy that evaluates the reorientation behavior in bulk. Furthermore, more preferable in-plane orientation is observed at the nearest surface of the film, and the phenyl rings in the reoriented mesogenic side groups show slightly perpendicular orientation to the surface normal.
doi_str_mv 10.1080/15421406.2014.940492
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source Taylor and Francis:Jisc Collections:Taylor and Francis Read and Publish Agreement 2024-2025:Science and Technology Collection (Reading list); MLA International Bibliography with Full Text
subjects Absorption spectroscopy
Crystals
Fine structure
LC alignment
Liquid crystal polymers
Liquid crystals
Measurement
NEXAFS
Orientation
Photoalignment
photoinduced orientation
Rings (mathematics)
Spectrum analysis
Surface chemistry
Three dimensional
title NEXAFS Study on Photoalignment of Liquid Crystalline Polymeric Films
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