Curvature-guided depletion stabilizes Kagome superlattices of nanocrystals
成果类型：
Article
署名作者：
Wan, Siyu; Xia, Xiuyang; Gao, Yutong; Zhang, Heyang; Zhang, Zhebin; Wu, Fangyue; Wu, Xuesong; Yang, Dong; Li, Tongtao; Li, Jianfeng; Ni, Ran; Dong, Angang
署名单位：
Fudan University; Fudan University; Nanyang Technological University; Fudan University
刊物名称：
SCIENCE
ISSN/ISSBN：
0036-10722
DOI：
10.1126/science.adu4125
发表日期：
2025-02-28
页码：
978-984
关键词：
摘要：
Shape-anisotropic nanocrystals and patchy particles have been explored to construct complex superstructures, but most studies have focused on convex shapes. We report that nonconvex, dumbbell-shaped nanocrystals (nanodumbbells) exhibit globally interlocking self-assembly behaviors governed by curvature-guided depletion interactions. By tailoring the local curvature of nanodumbbells, we can precisely and flexibly adjust particle bonding directionality, a level of control rarely achievable with conventional convex building blocks. These nanodumbbells can undergo long-range ordered assembly into various intricate two-dimensional superlattices, including the chiral Kagome lattice. Theoretical calculations reveal that the Kagome lattice is a thermodynamically stable phase, with depletion interactions playing a crucial role in stabilizing these non-close-packed structures. The emergence of Kagome lattices and other unusual structures highlights the vast potential of nonconvex nanocrystals for creating sophisticated architectures.