论文标题
在硝酸锂表面上的铁电列液晶的运行流
Running streams of a ferroelectric nematic liquid crystal on a lithium niobate surface
论文作者
论文摘要
将铁电列液晶材料的无柄液滴暴露于在X型铁掺杂的硝基烯烃晶体中通过pyroelectric和Pyroelectric和Photogalvanic（光伏）效应产生的表面电场。通过极化光学（视频）显微镜（POM）监测所得的动态过程。在加热/冷却周期期间，首先，液滴将其形状从球形变为延长的椭圆形。然后，它们开始沿表面电场迅速移动，即沿晶体的极轴（C轴）。在此运动过程中，几滴液滴合并为延伸到顶部表面积边缘的跑步流（卷须）。最后，几乎所有液晶材料都从顶表面传输到晶体的侧面。在稳定的温度下，组装的激光照明会导致位于照明区域的动态过程。同样，在这种情况下，LC液滴合并成几个类似卷须的地层，优先沿着晶体的C轴定向。卷须的模式随着时间的流逝而波动，但只要存在照明，它就会存在。在这种情况下，LC材料在照明区域的中央和边缘区域之间运输。
Sessile droplets of a ferroelectric nematic liquid crystalline material were exposed to surface electric fields produced by pyroelectric and photogalvanic (photovoltaic) effects in X-cut iron-doped lithium niobate crystals. The resulting dynamic processes were monitored by polarization optical (video)microscopy (POM). During heating/cooling cycles, at first, the droplets change their shape from spherical to extended ellipsoidal. Then they start to move rapidly along the surface electric field, i.e., along the crystal's polar axis (c-axis). During this motion, several droplets merge into running streams (tendrils) extending towards the edges of the top surface area. Finally, practically all liquid crystalline material is transported from the top surface to the side surfaces of the crystal. At stabilized temperature, laser illumination of the assembly causes dynamic processes that are localized to the illuminated area. Also, in this case, the LC droplets merge into several tendril-like formations that are preferentially oriented along the c-axis of the crystal. The pattern of tendrils fluctuates with time, but it persists as long as the illumination is present. In this case, the LC material is transported between the central and the edge region of the illuminated area.
