Oily streaks and focal conic domains in Lα lyotropic liquid crystals
Oily streaks and focal conic domains in Lα lyotropic liquid crystals
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Lα 溶致液晶中的油性条纹和焦锥域
DOI：
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发表时间：
1991
期刊：
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通讯作者：
M. Kleman
中科院分区：
文献类型：
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作者：
P. Boltenhagen;O. Lavrentovich;M. Kleman
用偏光显微镜观察准三元体系氯化十六烷基吡啶鎓/己醇/盐水的溶致L α (SmA)相中的缺陷，证明油性条纹是焦点圆锥域链。该链在L α -L 3 相变附近是稳定的。 G. Friedel 很久以前就提出了这种油性条纹模型，但其存在并没有得到毫无疑问的证实。我们讨论了这些结构的几何、拓扑和能量学特性，并表明它们的稳定性取决于材料常数，特别是鞍形刚度，其值可以根据油条纹的参数来估计。
Observations with the polarizing microscope of defects in the lyotropic L α (SmA) phase of the quasi-ternary system cetylpiridinium chloride/hexanol/brine give evidence that oily streaks are chains of focal conic domains. The chains are stable in the vicinity of the L α -L 3 phase transition. Such a model of oily streaks was suggested long ago by G. Friedel but its existence was not confirmed unquestionably. We discuss the geometrical, topological and energetics properties of these structures and show that their stability depends on material constants, in particular, the saddle-play rigidity, whose value can be estimated frome the parameters of the oily streaks.