| Download | - View supplementary information: Transformations of magic-size clusters via precursor compound cation exchange at room temperature (PDF, 2.0 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1021/jacs.2c07972 |
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| Author | Search for: He, Li; Search for: Luan, Chaoran; Search for: Liu, Shangpu; Search for: Chen, Meng; Search for: Rowell, Nelson1; Search for: Wang, Ze; Search for: Li, Yang; Search for: Zhang, Chunchun; Search for: Lu, Jiao; Search for: Zhang, MengORCID identifier: https://orcid.org/0000-0002-2852-2527; Search for: Liang, BinORCID identifier: https://orcid.org/0000-0003-2942-4686; Search for: Yu, KuiORCID identifier: https://orcid.org/0000-0003-0349-2680 |
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| Affiliation | - National Research Council of Canada. Metrology Research Centre
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| Funder | Search for: State Key Laboratory of Polymer Materials Engineering; Search for: National Natural Science Foundation of China; Search for: Key State Laboratory for Supramolecular Structures and Materials of Jilin University |
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| Format | Text, Article |
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| Subject | cadmium selenide; cadmium sulfide; chemical reactions; colloids; mixtures |
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| Abstract | The transformation of colloidal semiconductor magic-size clusters (MSCs) from zinc to cadmium chalcogenide (ZnE to CdE) at low temperatures has received scant attention. Here, we report the first room-temperature evolution of CdE MSCs from ZnE samples and our interpretation of the transformation pathway. We show that when prenucleation stage samples of ZnE are mixed with cadmium oleate (Cd(OA)₂), CdE MSCs evolve; without this mixing, ZnE MSCs develop. When ZnE MSCs and Cd(OA)₂ are mixed, CdE MSCs also form. We propose that Cd(OA)2 reacts with the precursor compounds (PCs) of the ZnE MSCs but not directly with the ZnE MSCs. The cation exchange reaction transforms the ZnE PCs into CdE PCs, from which CdE MSCs develop. Our findings suggest that in reactions that lead to the production of binary ME quantum dots, the E precursor dominates the formation of binary ME PCs (M = Zn or Cd) to have similar stoichiometry. The present study provides a much more profound view of the formation and transformation mechanisms of the ME PCs. |
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| Publication date | 2022-10-10 |
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| Publisher | ACS Publications |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 211a8563-4285-4a91-9d6c-12d72db071a6 |
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| Record created | 2023-06-29 |
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| Record modified | 2023-06-29 |
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