论文标题
限制引起的解体和结晶
Confinement-induced demixing and crystallization
论文作者
论文摘要
我们模拟了限制在两个平行的硬墙之间的强大尺寸的硬球体。我们发现，限制会诱导结晶成N层的六角形晶格和一种新型的蜂窝状结构，这是通过分馏促进的。冰点的发作阻止了稳定玻璃相的形成，并且在堆积分数要比散装的小得多。改变墙壁的分离会触发固体到固体的跃迁，并系统地改变晶体颗粒的尺寸分布，我们使用半定量理论合理化了晶体颗粒。我们表明，可以在楔形几何形状中利用结晶为不同大小的demix颗粒。
We simulate a strongly size-disperse hard-sphere fluid confined between two parallel, hard walls. We find that confinement induces crystallization into n-layered hexagonal lattices and a novel honeycomb-shaped structure, facilitated by fractionation. The onset of freezing prevents the formation of a stable glass phase and occurs at much smaller packing fraction than in bulk. Varying the wall separation triggers solid-to-solid transitions and a systematic change of the size-distribution of crystalline particles, which we rationalize using a semi-quantitative theory. We show that the crystallization can be exploited in a wedge geometry to demix particles of different sizes.
