期刊
NATURE COMMUNICATIONS
卷 11, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-020-18014-6
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资金
- China Postdoctoral Science Foundation [2020T130441]
- Sichuan University Postdoctoral Research Fund [2019SCU12073, 0020224153002]
- National Natural Science Foundation of China (NSFC) [21773162]
- Applied Basic Research Programs of Science and Technology Department of Sichuan Province [2020YJ0326]
- State Key Laboratory of Polymer Materials Engineering of Sichuan University [sklpme2018-2-08]
- Open Project of Key State Laboratory for Supramolecular Structures and Materials of Jilin University [201935, 202035]
- National Major Scientific and Technological Special Project for Significant New Drugs Development [2019ZX09201005-005-001, 2019ZX09201005-005-002]
- STFC [ST/V000039/1] Funding Source: UKRI
Aqueous-phase approaches to semiconductor CdS magic-size clusters (MSCs) and the formation pathway have remained relatively unexplored. Here, we report the demonstration of an aqueous-phase, room-temperature approach to CdS MSCs, together with an exploration of their evolution pathway. The resulting CdS MSCs display a sharp optical absorption peak at about 360nm and are labeled MSC-360. With CdCl2 and thiourea as the respective Cd and S sources, and 3-mercarpotopropionic acid as the ligand, CdS MSC-360 develops in a mixture of a primary amine and water. We argue that the primary amine facilitates room-temperature decomposition of thiourea when CdCl2 is present, and the formation pathway of MSCs is similar to that in organic-phase approaches. Our findings show there is a viable avenue to room-temperature aqueous-phase formation of CdS MSCs. Providing explanations of the procedure developed including the formation of large aggregates, the present study represents an important advance towards a mechanistic understanding of nanocrystal synthesis. CdS magic-size clusters have, so far, been prepared only in organic solvents. Here, the authors report an aqueous-phase synthesis for CdS magic-size clusters at room temperature and reveal insights into the formation mechanism, including the key role of primary amines.
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