Tetravalent colloids by nematic wetting
Tetravalent colloids by nematic wetting
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DOI：
10.1209/epl/i2004-10316-1
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发表时间：
2004-07
期刊：
影响因子：
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通讯作者：
M. Huber;H. Konstanz;U. Columbia
中科院分区：
文献类型：
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作者：
M. Huber;H. Konstanz;U. Columbia
在一篇精美的论文中，纳尔逊提出了一种基于球形颗粒表面上产生的四面体构型来生产四价胶体的方法。由于存在四个1/2向错，它从放置在球体上的二维向列液晶中出现，即，取向顺序中的拓扑缺陷（纳尔逊D. R.，Nano Lett. 2（2002）1125）。在本文中，我们表明，这样的四面体配置也发生在润湿层周围形成的球体分散在液晶以上的向列型各向同性相变。因此，向列型润湿提供了一种实现四价胶体的替代途径。
In an elegant paper, Nelson suggested a method to produce tetravalent colloids based on a tetrahedral configuration created on the surface of a spherical particle. It emerges from a two-dimensional nematic liquid crystal placed on a sphere due to the presence of four 1/2 disclinations, i.e., topological defects in the orientational order (Nelson D. R., Nano Lett. 2 (2002) 1125). In this paper we show that such a tetrahedral configuration also occurs in the wetting layers which form around spheres dispersed in a liquid crystal above the nematic-isotropic phase transition. Nematic wetting therefore offers an alternative route towards tetravalent colloids.