Instituto de Química, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Departamento de Física, Universidad Autónoma Metropolitana Iztapalapa, Mexico City, Mexico.
Adv Colloid Interface Sci. 2022 Oct;308:102748. doi: 10.1016/j.cis.2022.102748. Epub 2022 Aug 3.
Colloidal suspensions of monodisperse spherical particles have been extensively studied since one of the main advantages of these systems is their similarity to atomic ones. This property has been used successfully in basic science to understand the equilibrium and non-equilibrium behavior of model colloids and to correlate them with their atomic counterparts. In contrast, suspensions used in technological processes are usually more complex. Nevertheless, for their effective applications, it is crucial to understand their properties, such as the microstructure, dynamics, and flow behavior, as well as the mechanisms underlying their self-organization. The first step towards this knowledge is switching from monodisperse suspensions to moderately complex ones, namely binary mixtures. Therefore, the present review aims to summarize the current knowledge about the phase behavior of binary mixtures of spherical colloids with different inter-particle interactions, such as nearly hard spheres, electrostatic repulsion/attraction, depletion attraction, and attraction due to DNA hybridization. A comparison of experimental work with theoretical predictions is described for binary suspensions studied in three and two dimensions. Several open questions are outlined in the conclusions.
单分散球形颗粒的胶体悬浮液自问世以来就得到了广泛的研究，因为这些系统的主要优点之一是它们与原子系统相似。这种特性已成功地应用于基础科学领域，以了解模型胶体的平衡和非平衡行为，并将其与相应的原子进行关联。相比之下，在技术过程中使用的悬浮液通常更为复杂。然而，为了实现其有效应用，理解其性质（如微观结构、动力学和流动行为）以及其自组织的机制至关重要。了解这些性质的第一步是从单分散悬浮液转向稍复杂的悬浮液，即二元混合物。因此，本综述旨在总结关于具有不同粒子间相互作用的球形胶体二元混合物的相行为的最新知识，例如近硬球、静电排斥/吸引、耗尽吸引和 DNA 杂交引起的吸引。对于在三维和二维中研究的二元悬浮液，描述了实验工作与理论预测的比较。在结论中概述了几个悬而未决的问题。
