Institut für Physikalische Chemie I: Kolloide und Nanooptik, Heinrich-Heine-Universität Düsseldorf, D-40225 Düsseldorf, Germany.
Institut für Theoretische Physik II: Weiche Materie, Heinrich-Heine-Universität Düsseldorf, D-40225 Düsseldorf, Germany.
Phys Chem Chem Phys. 2019 Sep 21;21(35):19153-19162. doi: 10.1039/c9cp03116b. Epub 2019 Aug 21.
Control over microstructure and interparticle spacing in substrate-supported colloidal arrangements is a key challenge in colloidal self-assembly. We demonstrate here the preparation of Moiré and honeycomb monolayer lattices from core/shell microgels with rigid inorganic cores and soft, deformable hydrogel shells. These structures were realized by the sequential double deposition of freely floating monolayers from the air/water interface onto the same, centimetre-scale substrate. Due to the soft and deformable character of the hydrogel shells, the second applied monolayer fully settles into the same plane as the first monolayer. The resulting structural motif is determined by the drying conditions applied to the second deposition step. We support our experimental findings by Brownian dynamics simulations and provide insights into the structure formation process.
在胶体自组装中，对基底支撑胶体排列的微结构和颗粒间间距的控制是一个关键挑战。在这里，我们展示了通过具有刚性无机核和软、可变形水凝胶壳的核壳微凝胶制备莫尔和蜂窝状单层格子。这些结构是通过从空气/水界面顺序双重沉积自由漂浮的单层来实现的，这些单层沉积到相同的厘米级基底上。由于水凝胶壳的柔软和可变形特性，第二层施加的单层完全与第一层在同一平面上。所得结构图案由施加到第二层沉积步骤的干燥条件决定。我们通过布朗动力学模拟支持我们的实验发现，并提供了对结构形成过程的深入了解。
