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arXiv 1104.5345cond-mat.soft
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焦锥畴近晶相液晶的弹性

Elasticity of smectic liquid crystals with focal conic domains

S. Fujii, S. Komura, Y. Ishii, C. -Y. D. Lu

摘要:

研究了具有焦锥畴的热致近晶相液晶的弹性性质。在不同温度下施加受控预剪切后,我们独立地测量了剪切模量G'和FCD尺寸L。我们发现这些量之间存在着标度关系G' ~ γ_{eff}/L,其中γ_{eff}是FCD的有效表面张力。实验得到的γ_{ \rm eff}值与层状体系\sqrt{KB}的有效表面张力具有相同的标度,其中K和B分别为弯曲模量和层压缩模量。这种标度关系的表面活性剂洋葱相的相似性表明,具有缺陷的层状系统的普遍流变行为。

英文摘要:

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 measured the shear modulus G' and the FCD size L. We find out that these quantities are related by the scaling relation G' ~ γ_{eff}/L where γ_{eff} is the effective surface tension of the FCDs. The experimentally obtained value of γ_{\rm eff} shows the same scaling as the effective surface tension of the layered systems \sqrt{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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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