Self-Assembled Ring-Based Complex Colloidal Particles by Lock-And-Key Interaction and Their Self-Assembly into Unusual Colloidal Crystals,Langmuir

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Self-Assembled Ring-Based Complex Colloidal Particles by Lock-And-Key Interaction and Their Self-Assembly into Unusual Colloidal Crystals
Langmuir ( IF 3.7 ) Pub Date : 2024-04-17 , DOI: 10.1021/acs.langmuir.4c00584
Linna Wang ₁ , Bing Liu _{1,

2}

Affiliation

Creating hierarchical crystalline materials using simple colloids or nanoparticles is very challenging, as it is usually impossible to achieve hierarchical structures without nonhierarchical colloidal interactions. Here, we present a hierarchical self-assembly (SA) route that employs colloidal rings and anisotropic colloidal particles to form complex colloids and uses them as building blocks to form unusual colloidal columnar liquid crystals or crystals. This route is realized by designing hierarchical SA driving forces that is controlled by the colloidal shape and shape-dependent depletion attraction. Depletion-induced lock-and-key interaction is the first driving force, which ensures a high efficiency (>90%) to load colloidal particles of other shapes such as spheres, spherocylinders, and oblate ellipsoids into rings, providing high-quality building blocks. Their SA into ordered superstructures has to require a second driving force such as higher volume fraction and/or stronger depletion attraction. As a result, unusual hierarchical colloidal (liquid) crystals, which have previously been difficult to fabricate by simple binary assembly, can be achieved. This work presents a significant advancement in the field of hierarchical SA, demonstrating a promising strategy for constructing many unprecedented crystalline materials by the SA route.

中文翻译：

通过锁和钥匙相互作用自组装环基复杂胶体颗粒及其自组装成不寻常的胶体晶体

使用简单的胶体或纳米粒子创建分层晶体材料非常具有挑战性，因为通常不可能在没有非分层胶体相互作用的情况下实现分层结构。在这里，我们提出了一种分层自组装（SA）路线，利用胶体环和各向异性胶体颗粒形成复杂的胶体，并使用它们作为构建块来形成不寻常的胶体柱状液晶或晶体。该路线是通过设计由胶体形状和形状相关的耗尽吸引力控制的分层SA驱动力来实现的。耗尽引起的锁-钥匙相互作用是第一驱动力，确保高效率（>90%）将球体、球柱体、扁椭球体等其他形状的胶体颗粒加载到环中，提供高质量的构建块。它们的SA进入有序的上部结构必须需要第二驱动力，例如更高的体积分数和/或更强的耗尽吸引力。因此，可以实现以前难以通过简单的二元组装制造的不寻常的分层胶体（液体）晶体。这项工作在分层SA领域取得了重大进展，展示了通过SA路线构建许多前所未有的晶体材料的有前途的策略。

更新日期：2024-04-17

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