[M-IS13] 結晶成⻑、溶解における界⾯・ナノ現象

[MIS13-09] ヘテロエピタキシャル成長による２元系コロイド結晶の多段階核形成

*野澤 純¹、宇田 聡²、藤原 航三¹ (1.東北大学金属材料研究所、2.東北大学未来科学技術共同研究センター)

キーワード：コロイド結晶、エピタキシャル成長、多段階核形成

Binary colloidal crystals (BCCs) exhibit various useful characteristics for diverse applications of colloidal crystals. Additionally, they serve as a useful model system to understand the complex crystallization processes of atomic systems. Understanding the nucleation and growth processes of BCCs is essential for achieving controlled growth of desired crystals as well as the complex crystallization process. In this study, we have investigated the nucleation process of BCCs via colloidal heteroepitaxy, in which colloidal crystals are grown on a foreign crystal surface as a substrate. The substrates facilitate the formation of a metastable phase, which is observed in situ with single-particle resolution, revealing a detailed nucleation process: multi-step nucleation and composition-dependent nucleation rate. The composition of the initial solution affects the nucleation rate of the metastable phase as well as the final phase, which is critical for crystal growth control.