Elasticity of smectic liquid crystals with focal conic domains
Elasticity of smectic liquid crystals with focal conic domains
复制标题
DOI：
10.1088/0953-8984/23/23/235105
复制
发表时间：
2011-06-15
影响因子：
2.7
通讯作者：
Lu, C-Y D.
中科院分区：
文献类型：
--
作者：
Fujii, S.;Komura, S.;Lu, C-Y D.
研究了具有焦锥域的热致近晶液晶的弹性特性。在不同温度下应用可控预剪切后，我们独立测量了剪切模量G‘和FCD尺寸L。我们发现这些量与近似于gamma(eff)/L的标度关系G’相关，其中gamma（eff）是FCD的有效表面张力。实验得到的gamma（eff）值与层状体系的有效表面张力根KB具有相同的标度，其中K和B分别为弯曲模量和层压缩模量。这种结垢关系与表面活性剂洋葱相的结垢关系的相似性表明，具有缺陷的层状体系具有普遍的流变行为。
We study the elastic properties of thermotropic smectic liquid crystals with focal conic domains (FCDs). After the application of the controlled preshear at different temperatures, we independently measure the shear modulus G' and the FCD size L. We find out that these quantities are related by the scaling relation G' approximate to gamma(eff)/L, where gamma(eff) is the effective surface tension of the FCDs. The experimentally obtained value of gamma(eff) shows the same scaling as the effective surface tension of the layered systems root KB, where K and B are the bending modulus and the layer compression modulus, respectively. The similarity of this scaling relation to that of the surfactant onion phase suggests an universal rheological behavior of the layered systems with defects.