| DOI | Trouver le DOI : https://doi.org/10.1002/anie.202001608 |
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| Auteur | Rechercher : Li, Lijia; Rechercher : Zhang, Jing; Rechercher : Zhang, Meng; Rechercher : Rowell, Nelson1; Rechercher : Zhang, Chunchun; Rechercher : Wang, Shanling; Rechercher : Lu, Jiao; Rechercher : Fan, Hongsong; Rechercher : Huang, Wen; Rechercher : Chen, Xiaoqin; Rechercher : Yu, KuiIdentifiant ORCID : https://orcid.org/0000-0003-0349-2680 |
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| Affiliation | - Conseil national de recherches du Canada. Centre de recherche en métrologie
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| Format | Texte, Article |
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| Sujet | cadmium sulfide; crystal growth; magic-size clusters; nucleation; quantum dots |
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| Résumé | Colloidal small‐size CdS quantum dots (QDs) are produced usually with low particle yield, together with side products such as the particular precursor compounds (PCs) of magic‐size clusters (MSC). Here, we report our synthesis of small‐size CdS QDs without the coexistence of the PC and thus with enhanced particle yield. For a conventional reaction of cadmium oleate (Cd(OA)2) and sulfur (S) in 1‐octadecene (ODE), we show that after the formation of the PC in the pre‐nucleation stage, the addition of tri‐n‐octylphosphine oxide (TOPO) facilitates the production of small‐size QDs. We demonstrate that TOPO fragmentizes the PC that have formed, which enables the nucleation and growth of small‐size QDs even at room temperature. Our findings introduce a new approach to making small‐size QDs without the coexistence of the PC and with improved particle yield. Providing experimental evidence for the two‐pathway model proposed for the pre‐nucleation stage of colloidal binary QDs, the present study aids in the advance of non‐classical nucleation theory. |
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| Date de publication | 2020-05-11 |
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| Maison d’édition | Wiley |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | e1884fe8-018e-4998-bc65-a0ad4dd4298d |
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| Enregistrement créé | 2020-10-28 |
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| Enregistrement modifié | 2021-09-17 |
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