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One Methylene Group in the Side Chain Can Alter by 90 Degrees the Orientation of a Main-Chain Liquid Crystal on an Unidirectional Substrateстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
- Авторы: Yaroslav Odarchenko, Matthieu Defaux, Akhkiamova Azaliia F., Bovsunovskaya Polina V., Melnikov Alexey P., Rodygin Alexander I., Rychkov Andrey A., Gerasimov Kirill L., Anokhin Denis V., Xiaomin Zhu, Martin Rosenthal, Ivanov Dimitri A.
- Журнал: ACS macro letters
- Том: 7
- Год издания: 2018
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 453
- Последняя страница: 458
- DOI: 10.1021/acsmacrolett.8b00044
- Аннотация: The mechanisms of orientation of columnar liquid crystals (LCs) on PTFE-rubbed surface are explored on a homologous series of symmetrically-substituted poly(di-n-alkylsiloxanes) (PDAS). It is shown that by increasing the side-chain length in steps of one CH2 group the orientation of PDAS switches back and forth from perpendicular to parallel with respect to PTFE chains. These changes sensitive to the smallest possible variation of the macromolecular structure (i.e., modification of the side chain length by just one CH2 group) reflect the alteration of the alignment mechanism identified as grapho-epitaxial or epitaxial for the perpendicular and parallel orientation, respectively. The results show that two orthogonal LC orientations are realizable on the same rubbed substrate, which can open new perspectives in the field of organic and printed electronics such as multi-domain LCD technology.
- Добавил в систему: Иванов Дмитрий Анатольевич