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Large-scale self-organization of reconfigurable topological defect networks in nematic liquid crystals
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| Title: | Large-scale self-organization of reconfigurable topological defect networks in nematic liquid crystals |
| Authors: | Sasaki, Yuji Browse this author →KAKEN DB | | Jampani, V. S. R. Browse this author | | Tanaka, Chiharu Browse this author | | Sakurai, Nobutaka Browse this author | | Sakane, Shin Browse this author | | Le, Khoa V. Browse this author | | Araoka, Fumito Browse this author | | Orihara, Hiroshi Browse this author →KAKEN DB |
| Issue Date: | 7-Nov-2016 |
| Publisher: | Nature Publishing Group |
| Journal Title: | Nature communications |
| Volume: | 7 |
| Start Page: | 13238 |
| Publisher DOI: | 10.1038/ncomms13238 |
| Abstract: | 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. |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/63830 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 折原 宏
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