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Shin, Tae Joo
UNIST Central Research Facilities (UCRF)
Research Interests
  • Synchrotron Radiation Application Researches

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Nanoconfined heliconical structure of twist-bend nematic liquid crystal phase

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Title
Nanoconfined heliconical structure of twist-bend nematic liquid crystal phase
Author
You, RaPark, WongiCarlson, EricRyu, Seong HoShin, Min JeongGuzman, EdwardAhn, HyungjuShin, Tae JooWalba, David M.Clark, Noel A.Yoon, Dong Ki
Issue Date
2019-08
Publisher
TAYLOR & FRANCIS LTD
Citation
LIQUID CRYSTALS, v.46, no.2, pp.316 - 325
Abstract
We produced controlled heliconical structures of a twist-bend nematic (N-TB) liquid-crystal (LC) phase in nanoconfinement in a porous anodic aluminium oxide (AAO) film. The structural parameters of the N-TB phase such as conical angle and helical pitch can be modulated by varying the surface energy of the inner surface of the porous AAO film, done by using different self-assembled monolayers (SAMs). The LC molecules tend to be more freely packed, thus forming a larger conical angle, when placed on the tri-deca-fluoro-1,1,2,2-tetrahydrooctyl-trichlorosilane (FOTS)-treated substrate, which has a relatively low surface energy. In contrast, the molecules form a more tightly packed structure, and thus a smaller conical angle, when placed on the 2-(methoxy(polyethyleneoxy)-propyl)trimethoxysilane (PEG 6/9)-treated substrate, which has higher surface energy. This work improves our collective understanding of self-assembled heliconical structures in the N-TB phase.
URI
https://scholarworks.unist.ac.kr/handle/201301/26461
URL
https://www.tandfonline.com/doi/full/10.1080/02678292.2018.1508770
DOI
10.1080/02678292.2018.1508770
ISSN
0267-8292
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UCRF_Journal Papers
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