在干燥液滴的球形约束下胶体超球的自组装

Q3 Materials Science JCIS open Pub Date : 2022-04-01 DOI:10.1016/j.jciso.2021.100037
Sarah Schyck , Janne-Mieke Meijer , Lucia Baldauf , Peter Schall , Andrei V. Petukhov , Laura Rossi
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引用次数: 3

摘要

了解胶体构筑块形状与自组装材料结构之间的关系,对于开发新型自组装材料具有重要意义。在这方面,胶体超级球是独特的积木,因为它们的形状可以在球形和立方之间平滑地转换。胶体超球在球形约束下的组装产生具有有序内部结构的宏观团簇。利用小角x射线散射(SAXS)技术,研究了胶体超球分散液滴在约束过程中的内部结构。我们观察并确定了通过蒸发液滴在压缩过程中产生的四种不同的干燥制度,并跟踪了组装宏观结构的发展。当超级球组装时,我们发现它们排列成预测的准晶、菱形c1晶格,这种晶格随组成超级球的形状而变化。这为约束和粒子形状之间的行为提供了见解,可以应用于新功能材料的开发。
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Self-assembly of colloidal superballs under spherical confinement of a drying droplet

Understanding the relationship between colloidal building block shape and self-assembled material structure is important for the development of novel materials by self-assembly. In this regard, colloidal superballs are unique building blocks because their shape can smoothly transition between spherical and cubic. Assembly of colloidal superballs under spherical confinement results in macroscopic clusters with ordered internal structure. By utilizing Small Angle X-Ray Scattering (SAXS), we probe the internal structure of colloidal superball dispersion droplets during confinement. We observe and identify four distinct drying regimes that arise during compression via evaporating droplets, and we track the development of the assembled macrostructure. As the superballs assemble, we found that they arrange into the predicted paracrystalline, rhombohedral C1-lattice that varies by the constituent superballs’ shape. This provides insights in the behavior between confinement and particle shape that can be applied in the development of new functional materials.

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来源期刊
JCIS open
JCIS open Physical and Theoretical Chemistry, Colloid and Surface Chemistry, Surfaces, Coatings and Films
CiteScore
4.10
自引率
0.00%
发文量
0
审稿时长
36 days
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