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Directional-dependent pockets drive columnar-columnar coexistence.
Soft Matter ( IF 2.9 ) Pub Date : 2020-06-19 , DOI: 10.1039/d0sm00802h
Álvaro González García 1 , Remco Tuinier 2 , Gijsbertus de With 2 , Alejandro Cuetos 3
Affiliation  

The rational design of materials requires a fundamental understanding of the mechanisms driving their self-assembly. This may be particularly challenging in highly dense and shape-asymmetric systems. Here we show how the addition of tiny non-adsorbing spheres (depletants) to a dense system of hard disc-like particles (discotics) leads to coexistence between two distinct, highly dense (liquid)-crystalline columnar phases. This coexistence emerges due to the directional-dependent free-volume pockets for depletants. Theoretical results are confirmed by simulations explicitly accounting for the binary mixture of interest. We define the stability limits of this columnar–columnar coexistence and quantify the directional-dependent depletant partitioning.

中文翻译:

方向相关的口袋驱动柱状-柱状共存。

材料的合理设计要求对驱动其自组装的机制有基本的了解。在高度密集且形状不对称的系统中,这可能尤其具有挑战性。在这里,我们展示了将微小的非吸附性球体(贫化剂)添加到致密的硬盘状颗粒(胶质)体系中如何导致两个截然不同的高密度(液晶)柱状相共存。这种共存的出现是由于依赖于耗尽剂的方向相关的自由容积袋。理论结果通过模拟明确证实了感兴趣的二元混合物得到了证实。我们定义了柱状-柱状共存的稳定性极限,并量化了与方向相关的耗尽分区。
更新日期:2020-07-29
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