Customizable nano-sized colloidal tetrahedra by polymerization-induced particle self-assembly (PIPA),Polymer Chemistry

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Customizable nano-sized colloidal tetrahedra by polymerization-induced particle self-assembly (PIPA)
Polymer Chemistry ( IF 4.1 ) Pub Date : 2022-05-19 , DOI: 10.1039/d2py00407k
Dan Li _{1,

2} , Nan Liu ₃ , Min Zeng ₁ , Jinzhao Ji ₁ , Xi Chen _{1,

4} , Jinying Yuan ₁

Affiliation

Colloidal molecules (CMs) are colloidal clusters with molecule-like symmetry and architecture, generated from the self-assembly of nanoparticles with attractive patches. However, the large-scale preparation of patchy nanoparticles remains challenging. Here, we synthesize CH₄-like colloidal tetrahedra (CTs) in a scalable way by aqueous polymerization-induced particle self-assembly (PIPA), where isotropic diblock copolymer spheres are used as seeds. During PIPA, the newly formed third block aggregates into attractive patches, which bridge the isotropic spheres together to form CTs in situ, as a result of surface energy minimization. This approach surpasses previous reports in its scalability, high yield and versatility. For example, the purity of as-prepared CTs reaches 78.3% at a concentration of 100 g L⁻¹, which allows the 3D reconstruction of the tetrahedral structure by single particle electron microscopy analysis. The versatility of PIPA is illustrated by preparing CMs of tunable size, valency and various chemical structures. In addition, the architecture of the CMs can be manipulated after the PIPA process simply by the addition of ethanol, for example, the CTs can be transformed into ladder-like structures, paving a new avenue to access hierarchical nanoscale self-assemblies.

中文翻译：

通过聚合诱导粒子自组装 (PIPA) 可定制纳米级胶体四面体

胶体分子 (CM) 是具有类似分子对称性和结构的胶体簇，由具有吸引力的斑块的纳米粒子自组装产生。然而，片状纳米颗粒的大规模制备仍然具有挑战性。在这里，我们通过水聚合诱导的粒子自组装 (PIPA) 以可扩展的方式合成 CH ₄类胶体四面体 (CTs)，其中使用各向同性二嵌段共聚物球作为种子。在 PIPA 过程中，新形成的第三块聚集成有吸引力的斑块，将各向同性球体桥接在一起形成原位CT，作为表面能最小化的结果。这种方法在可扩展性、高产量和多功能性方面超过了以前的报告。例如，所制备的 CT 在浓度为 100 g L ^-1时的纯度达到 78.3% ，这允许通过单粒子电子显微镜分析对四面体结构进行 3D 重建。PIPA 的多功能性通过制备大小、化合价和各种化学结构可调的 CM 来说明。此外，在 PIPA 工艺之后，只需添加乙醇即可操纵 CM 的结构，例如，CT 可以转化为梯状结构，为获得分层纳米级自组装开辟了一条新途径。

更新日期：2022-05-19

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