压缩色液滴的形状双稳性
Shape Bistability in Squeezed Chromonic Droplets
摘要：
本文研究了在平行平板间挤压的有色液晶液滴在指向矢上的简并切向锚定。在共存制度，其中液滴中的α相与周围的熔体处于平衡，我们的二维理论模型预测的制度的形状双稳态足够大的双极液滴，其中tactoids（尖的形状）和discoids（光滑的形状）共存于平衡。目前尚未观察到这种现象。色甘酸二钠（DSCG）的二维液滴已经成为彻底的实验研究的对象[Y. K. Kim等人，J.物理学：康登斯Matter 25，404202（2013）]。我们表明，我们的理论是在良好的定量协议与这些数据，并从中提取什么承诺是一个更准确的估计各向同性表面张力在DSCG的结晶/熔体界面。
英文摘要：
We study droplets of chromonic liquid crystals squeezed between parallel plates inducing degenerate tangential anchoring on the nematic director. In the coexistence regime, where droplets in the nematic phase are at equilibrium with the surrounding melt, our two-dimensional theoretical model predicts a regime of shape bistability for sufficiently large bipolar droplets, where tactoids (pointed shapes) and discoids (smooth shapes) coexist in equilibrium. This phenomenon has not yet been observed. Two-dimensional droplets of disodium cromoglycate (DSCG) have been the object of a thorough experimental study [Y.-K. Kim et al., J. Phys.: Condens. Matter 25, 404202 (2013)]. We show that our theory is in good quantitative agreement with these data and extract from them what promises to be a more accurate estimate for the isotropic surface tension at the nematic/melt interface of DSCG.
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