Nucleation-induced undulative instability in thin films of nCB liquid crystals

Nucleation-induced undulative instability in thin films of nCB liquid crystals
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nCB 液晶薄膜中成核引起的波动不稳定性

DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
S. Herminghaus
S. Herminghaus
中科院分区：
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文献类型：
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作者：
S. Schlagowski;K. Jacobs;S. Herminghaus

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据报道，5CB 和 8CB 向列薄膜中存在表面不稳定性，发生在向列-各向同性相变附近。尽管这种不稳定性导致了让人想起旋节线反润湿的模式（并且已被解释为这样），但我们表明它实际上是基于成核机制的。其特征波长并不明显取决于薄膜厚度，而是很大程度上取决于加热速率。
A surface instability is reported in thin nematic films of 5CB and 8CB, occurring near the nematic-isotropic phase transition. Although this instability leads to patterns which are reminiscent of spinodal dewetting (and have been interpreted as such), we show that it is actually based on a nucleation mechanism. Its characteristic wavelength does not depend markedly on film thickness, but strongly on the heating rate.