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Large-scale self-organization of reconfigurable topological defect networks in nematic liquid crystals


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タイトル: Large-scale self-organization of reconfigurable topological defect networks in nematic liquid crystals
著者: Sasaki, Yuji 著作を一覧する
Jampani, V. S. R. 著作を一覧する
Tanaka, Chiharu 著作を一覧する
Sakurai, Nobutaka 著作を一覧する
Sakane, Shin 著作を一覧する
Le, Khoa V. 著作を一覧する
Araoka, Fumito 著作を一覧する
Orihara, Hiroshi 著作を一覧する
発行日: 2016年11月 7日
出版者: Nature Publishing Group
誌名: Nature communications
巻: 7
開始ページ: 13238
出版社 DOI: 10.1038/ncomms13238
抄録: Topological defects in nematic liquid crystals are ubiquitous. The defects are important in understanding the fundamental properties of the systems, as well as in practical applications, such as colloidal self-assembly, optical vortex generation and templates for molecular self-assembly. Usually, spatially and temporally stable defects require geometrical frustration imposed by surfaces; otherwise, the system relaxes because of the high cost of the elastic energy. So far, multiple defects are kept in bulk nematic liquid crystals by top-down lithographic techniques. In this work, we stabilize a large number of umbilical defects by doping with an ionic impurity. This method does not require pre-patterned surfaces. We demonstrate that molecular reorientation controlled by an AC voltage induces periodic density modulation of ions accumulated at an electrically insulating polymer interface, resulting in self-organization of a two-dimensional square array of umbilical defects that is reconfigurable and tunable.
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 折原 宏


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