| 초록 |
Nanocyrstals are widely studied for their physical properties and utilized in biology, electronics, optics, and catalyst. However, most of nanocrystal synthesis based on colloidal synthesis and deposition in solid state are developed empirically with a limited mechanistic understanding. It is mainly because of their size and heterogeneity in structures and physical properties which cannot be easily accessible by conventional analytical methods. Here, we introduce high-resolution observations of growth of individual nanocrystals in solution and on substrate by using in situ transmission electron microscopy. Our study unveils heterogeneity of growth mechanism of individual nanocrystals, critical steps during growth that incorporate non-classical pathways, and resulting 3D structures at the atomic resolution. We also compare growth trajectories of nanocrystals from solution phase synthesis with ones from substrate-induced formation. |
