Nature Materials ( IF 41.2 ) Pub Date : 2021-01-28 , DOI: 10.1038/s41563-020-00900-5 Mohammad-Amin Moradi 1, 2, 3 , E Deniz Eren 1, 2, 3 , Massimiliano Chiappini 4 , Sebastian Rzadkiewicz 1, 2 , Maurits Goudzwaard 1 , Mark M J van Rijt 1, 2 , Arthur D A Keizer 1 , Alexander F Routh 5 , Marjolein Dijkstra 4 , Gijsbertus de With 3 , Nico Sommerdijk 1, 2, 6 , Heiner Friedrich 1, 2, 3 , Joseph P Patterson 1, 2, 7
Periodic nano- or microscale structures are used to control light, energy and mass transportation. Colloidal organization is the most versatile method used to control nano- and microscale order, and employs either the enthalpy-driven self-assembly of particles at a low concentration or the entropy-driven packing of particles at a high concentration. Nonetheless, it cannot yet provide the spontaneous three-dimensional organization of multicomponent particles at a high concentration. Here we combined these two concepts into a single strategy to achieve hierarchical multicomponent materials. We tuned the electrostatic attraction between polymer and silica nanoparticles to create dynamic supracolloids whose components, on drying, reorganize by entropy into three-dimensional structured materials. Cryogenic electron tomography reveals the kinetic pathways, whereas Monte Carlo simulations combined with a kinetic model provide design rules to form the supracolloids and control the kinetic pathways. This approach may be useful to fabricate hierarchical hybrid materials for distinct technological applications.
中文翻译:
超胶体自发组织成三维结构材料
周期性的纳米级或微米级结构用于控制光、能量和质量传输。胶体组织是用于控制纳米和微米级秩序的最通用方法,它采用低浓度粒子的焓驱动自组装或高浓度粒子的熵驱动堆积。尽管如此,它还不能提供高浓度的多组分粒子的自发三维组织。在这里,我们将这两个概念结合到一个单一的策略中,以实现分层多组分材料。我们调整了聚合物和二氧化硅纳米粒子之间的静电吸引力,以创建动态超胶体,其成分在干燥时通过熵重组为三维结构化材料。低温电子断层扫描揭示了动力学途径,而蒙特卡罗模拟与动力学模型相结合提供了形成超胶体和控制动力学途径的设计规则。这种方法可能有助于为不同的技术应用制造分层混合材料。