| 학회 | 한국재료학회 |
| 학술대회 | 2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 | 22권 1호 |
| 발표분야 | B. 나노화학/바이오 재료 분과 |
| 제목 | Orientational Control of Lyotropic Chromonic Liquid Crystal by Varying Shear Rate |
| 초록 | Lyotropic chromonic liquid crystals (LCLCs) have been widely studied because they have intriguing structural features forming linearly aggregated columns in aqueous solution and various potential applications such as electro-optical devices.[1] For the applications, well-oriented structure of LCLCs is required and it could be obtained by mechanical shearing method, for example, doctor-blade coating which provides a thin-film of LCLCs aligned parallel to the shearing direction.[2] The highly-ordered film of LCLCs could be used as an alignment layer for guiding other LC materials by their topological regularity. In present work, we firstly report a shear rate dependent orientation of LCLCs and its applications of orthogonally patterned LC alignment layer. In the doctor-blade method, the crystallized columns of LCLCs are aligned parallel or perpendicular to the shearing direction at a fast shear rate and slow shear rate, respectively, which is induced by the competition between hydronamic effects and splay deformation. Based on the orthogonal alignment of the aggregation of LCLCs, alternating domains of nematic liquid crystal (NLC) was fabricated. Our result can provide a facile method to make an orthogonally patterned alignment layer and potential applications beyond current LCD technology. References: [1] Nazarenko V, et al. Lyotropic chromonic liquid crystal semiconductors for water-solution processable organic electronics. Appl. Phys. Lett. 97, 263305 (2010) [2] Park SK, et al. Polymer‐Stabilized Chromonic Liquid‐Crystalline Polarizer. Adv. Funct. Mater. 21, 2129 (2011) |
| 저자 | Yun Jeong Cha1, Min-Jun Gim1, Hyungju Ahn2, Tae Joo Shin3, Joonwoo Jeong3, Dong Ki Yoon1 |
| 소속 | 1KAIST, 2POSTECH, 3UNIST |
| 키워드 | Lyotropic chromonic liquid crystal (LCLC); Shearing rate; Self- assembly; Multi-domain alignment layer |
