| 초록 |
Formation and growth of semiconductor nanocrystals (NCs) have been first understood as an analogy to classical colloid theory based on thermodynamic aspects. And molecular spectroscopies enable to uncover the reaction chemistry of precursors behind their growth phenomena, for example, coordination of precursors or intermediates, surface coordination of ligands, and so on. However, there is a missing chain bridging the macroscopic NCs’ growth with the microscopic precursor reaction. To unveil the growth process of NCs in molecular scale, herein, we investigated the reaction intermediates produced from reaction precursors and NCs’ surface. Using 31P NMR, 1H DOSY and XPS, we discovered that the surface adsorption of precursors and their reaction accompany with the carboxylate transfer to incoming P-based ligands. This surface-initiated reaction pathway allows us not only to understand the growth mechanism of NCs, but also to apply it for preparing high quality core/shell quantum dots. |
