Reentrant network formation in patchy colloidal mixtures under gravity.
Reentrant network formation in patchy colloidal mixtures under gravity.
复制标题
重力作用下斑状胶体混合物中的重入网络形成。
作者：
D. de las Heras;Lucas L Treffenstädt;M. Schmidt
本文用Monte Carlo模拟和Wertheim理论研究了二维片状胶体混合物的沉积扩散平衡。通过调整胶体的浮力质量，我们可以控制不同密度和渗流性质的流体堆叠的重力诱导序列。我们发现复杂的堆叠序列与多达四层和重入网络的形成，一致的模拟和理论上只使用散装相图作为输入。我们的理论适用于一般的片状胶体混合物，并与理解重力下的实验有关。
We study a two-dimensional binary mixture of patchy colloids in sedimentation-diffusion equilibrium using Monte Carlo simulation and Wertheim's theory. By tuning the buoyant masses of the colloids we can control the gravity-induced sequence of fluid stacks of differing density and percolation properties. We find complex stacking sequences with up to four layers and reentrant network formation, consistently in simulations and theoretically using only the bulk phase diagram as input. Our theory applies to general patchy colloidal mixtures and is relevant to understanding experiments under gravity.