Photoresponsive Carbohydrate-based Surface Active Agents: Automatic Vertical Alignment of Liquid Crystal = Photoresponsive Carbohydrate-based Surface Active Agents: Automatic Vertical Alignment of Liquid Crystal

다국어 초록 (Multilingual Abstract)

For the fabrication of remote-controllable optical devices, we synthesized a photo-functionalized surfactant (abbreviated as CHA_n). CHA_n molecules contain both carbohydrate and azobenzene groups for the vertical alignment (VA) layer of nematic (N) liquid crystal (LC). It also contains the cellobiosyl polar head group for inducing the automatic 2D monolayer on the solid substrates. In case of CHA₁, it creates sufficient space in the self-assembled monolayer structure. The N-LC molecules can crawl into the space of the surfactant and form a VA layer. Because the CHA₃ molecules make a more dense monolayer structure on the substrates, the N-LC form the planar alignment (PA) layer. The N-LC alignments can be reversibly transformed between VA and PA by UV-Vis light. This work was supported by the MOTIE/KDRC 10051334, BK21 Plus program, and Mid-Career Researcher Program (2016R1A2B2011041).