Biaxial, Twist-bend, and Splay-bend Nematic Phases of Banana-shaped Particles Revealed by Lifting the "Smectic Blanket"
Biaxial, Twist-bend, and Splay-bend Nematic Phases of Banana-shaped Particles Revealed by Lifting the "Smectic Blanket"
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DOI：
10.1103/physrevlett.123.068001
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发表时间：
2019-08-05
影响因子：
8.6
通讯作者：
Dijkstra, Marjolein
中科院分区：
文献类型：
--
作者：
Chiappini, Massimiliano;Drwenski, Tara;Dijkstra, Marjolein
我们对香蕉形硬颗粒的相行为进行了广泛的计算研究，并表明双轴、扭弯和斜弯向列相相对于硬弯曲球柱系统的近晶相是亚稳的。然而，如果近晶相是不稳定的——无论是粒子长度上的多分散性还是粒子形状上的曲率——稳定的双轴、扭弯和斜弯向列相是可以得到的。这提供了一个统一的和一致的图像上的微妙作用的颗粒形状在弯曲棒的相行为。
We perform an extensive computational study on the phase behavior of hard banana-shaped particles, and show that biaxial, twist-bend, and splay-bend nematic phases are metastable with respect to a smectic phase for a system of hard bent spherocylinders. However, if the smectic phase is destabilized-either by polydispersity in the particle length or by curvature in the particle shape-stable biaxial, twist-bend, and splay-bend nematic phases are obtained. This provides a unified and consistent picture on the subtle role of particle shape on the phase behavior of bent rods.