Nematic Liquid Crystals and Nematic Colloids in Microfluidic Environment
Nematic Liquid Crystals and Nematic Colloids in Microfluidic Environment
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微流控环境中的向列液晶和向列胶体
DOI：
10.1080/15421406.2011.572784
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发表时间：
2011
影响因子：
0.7
通讯作者：
C. Bahr
中科院分区：
文献类型：
--
作者：
A. Sengupta;S. Herminghaus;C. Bahr
我们使用偏振透射显微镜和荧光共聚焦偏振显微镜研究了向列状lc和向列状胶体在微通道中的流动。根据沟道尺寸、沟道壁上的锚定条件和流速的不同，形成了不同的织构和缺陷结构：π-壁、斜纹线（DL）钉在沟道壁上、斜纹线一端钉在沟道壁上、斜纹线一端自由浮动、斜纹线和环以类似混沌的方式自由浮动。对含有胶体颗粒的向列型lc的初步观察表明，向列矩阵的织构和缺陷可以用来引导颗粒通过微通道的传输。
We study nematic LCs and nematic colloids flowing through microchannels using polarizing transmission microscopy and fluorescence confocal polarizing microscopy. Depending on the channel dimensions, the anchoring conditions on the channel walls, and the flow rate, the formation of different textures and defect structures is observed: π-walls, disclination lines (DL) pinned to the channel walls, DL with one pinned and one freely floating end, and DL and loops freely floating in a chaotic-like manner. Preliminary observations of nematic LCs containing colloidal particles indicate that textures and defects of the nematic matrix can be used to guide the transport of the particles through the microchannels.