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首页> 外文期刊>The European physical journal, E. Soft matter >Colloidal particles in a drying suspension: A phase field crystal approach
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Colloidal particles in a drying suspension: A phase field crystal approach

机译:干燥悬浮液中的胶体颗粒:相场晶体方法

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摘要

Using a phase field crystal model we study the structure and dynamics of a drop of colloidal suspension during evaporation of the solvent. We model an experimental system where contact line pinning of the drop on the substrate is non-existent. Under such carefully controlled conditions, evaporation of the drop produces an ordered or disordered arrangement of the colloidal residue depending only on the initial average density of solute and the drying rate. We obtain a non-equilibrium phase boundary showing amorphous and crystalline phases of single component and binary mixtures of colloidal particles in the density-drying rate plane. While single-component colloids order in the two-dimensional triangular lattice, a symmetric binary mixture of mutually repulsive particles can be ordered into three triangular sub-lattices in two dimensions. Two of them are occupied by the two species of particles with the third sub-lattice vacant. Graphical abstract: [Figure not available: see fulltext.]
机译:使用相场晶体模型,我们研究了溶剂蒸发过程中一滴胶体悬浮液的结构和动力学。我们对一个实验系统进行建模,在该系统中,不存在液滴在基板上的接触线固定。在这种精心控制的条件下,液滴的蒸发仅根据溶质的初始平均密度和干燥速率而产生胶体残渣的有序或无序排列。我们获得了一个非平衡相边界,该边界显示了密度-干燥速率平面中胶体颗粒的单组分和二元混合物的非晶相和结晶相。虽然单组分胶体在二维三角晶格中排序,但是相互排斥的粒子的对称二元混合物可以在二维中被排序为三个三角形子晶格。它们中的两个被两种粒子占据,第三个子晶格为空。图形摘要:[该图不可用:请参见全文。]

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