苯并菲
盘状液晶
顺势排列
材料科学
成核
相变
液晶
相(物质)
Crystal(编程语言)
介孔材料
化学物理
结晶学
凝聚态物理
化学
有机化学
光电子学
物理
计算机科学
催化作用
程序设计语言
作者
Sylwia Całus,A. V. Kityk,Patrick Huber
标识
DOI:10.1016/j.micromeso.2014.05.036
摘要
An optical polarimetry study of the orientational order of a discotic liquid crystal (DLC), 2,3,6,7,10,11-hexakis(hexyloxy)triphenylene (HAT6), confined into parallel-aligned cylindrical nanochannels of mesoporous alumina, silica, and silicon membranes as a function of temperature and channel radius (3.4–21.0 nm) is presented. In contrast to the bulk state, the birefringence resulting from the confined discotic liquid crystal, exhibits a continuous temperature evolution and is positive indicating a dominating face-on (homeotropic) type molecular ordering with respect to the channel walls. Pronounced hysteresis effects observed in the experiment are traced to different nucleation sites of the low-temperature phase upon cooling and the high-temperature phase upon heating. Deviations from the Gibbs–Thomson scaling of the phase transition temperature for channel diameters below 10 nm are traced to splay distortions of the confined liquid crystal.
科研通智能强力驱动
Strongly Powered by AbleSci AI