Photochemical Manipulation of Glycerol Droplets in Nematic Liquid Crystals
Photochemical Manipulation of Glycerol Droplets in Nematic Liquid Crystals
复制标题
向列液晶中甘油液滴的光化学操纵
DOI：
10.1080/15421400490435846
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发表时间：
2004
影响因子：
0.7
通讯作者：
H. Yokoyama
中科院分区：
文献类型：
--
作者：
T. Yamamoto;J. Yamamoto;B. Lev;H. Yokoyama
甘油液滴的动态操纵可以通过光在偶氮苯掺杂向列液晶中实现。在紫外光照射下，反式-顺式光异构化驱动液滴向富含顺式区域的定向运动，并组装成密堆积的二维六方胶体晶体。这种行为主要归因于液滴-LC 界面张力的降低，这与顺式异构体的表面活性增强有关。我们还通过将计算机生成的图像投影在样品上来进行定制液滴阵列的光化学组装。液滴的光诱导操纵将为液晶器件的微结构提供一种通用的方法。
Dynamic manipulation of glycerol droplets could be achieved by light in azobenzenedoped nematic liquid crystals. On irradiation of UV light, the trans-cis photoisomerization drives a directional motion of the droplets towards the cis-rich region and assembled close-packed two-dimensional hexagonal colloidal crystals. This behavior is mainly attributable to reduction of the droplet-LC interfacial tension, associated with the enhanced surface-activity of cis isomers. We also performed photochemical assembly of tailored droplet arrays by projection of computer-generated images on the samples. The photoinduced manipulation of droplets will provide a versatile approach to micro-structuring of LC devices.