论文标题
工程作业共同体以优化胶体混合物的自组装
Engineering azeotropy to optimize the self-assembly of colloidal mixtures
论文作者
论文摘要
反向自组装的目的是设计能够将单元组装成所需目标结构的颗粒间相互作用。复杂结构的有效组装通常需要使用多个组件，每个新组件都会增加自由度的热力学程度，从而增加自组装途径的复杂性。在这项工作中，我们探讨了使用共济会的可能性，即，该系统有效地作为一个组件系统的特殊热力学条件，作为控制任意数量组件的自组装的一种方式。利用质量平衡方程，我们显示了如何选择沿所需的自组装途径表现出共聚点的斑驳粒子系统。例如，我们绘制了二元混合物的相图，该相图通过设计将其完全组装成两极的钻石晶体。将共济型点明确包含到人工设计中的能力为复杂结构的自组装打开了新的途径。
The goal of inverse self-assembly is to design inter-particle interactions capable of assembling the units into a desired target structure. The effective assembly of complex structures often requires the use of multiple components, each new component increasing the thermodynamic degrees of freedom and hence the complexity of the self-assembly pathway. In this work we explore the possibility to use azeotropy, i.e. a special thermodynamic condition where the system behaves effectively as a one-component system, as a way to control the self-assembly of an arbitrarily number of components. Exploiting the mass-balance equations we show how to select patchy particle systems that exhibit azeotropic points along the desired self-assembly pathway. As an example we map the phase diagram of a binary mixture that, by design, fully assembles into cubic (and only cubic) diamond crystal via an azeotropic point. The ability to explicitly include azeotropic points into artificial designs opens novel pathways to the self-assembly of complex structures.
