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| DOI | Trouver le DOI : https://doi.org/10.1021/acs.jpclett.9b01005 |
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| Auteur | Rechercher : Zhang, Jing; Rechercher : Li, Lijia; Rechercher : Rowell, Nelson1; Rechercher : Kreouzis, TheoIdentifiant ORCID : https://orcid.org/0000-0003-2326-5338; Rechercher : Willis, Maureen; Rechercher : Fan, HongsongIdentifiant ORCID : https://orcid.org/0000-0003-3812-9208; Rechercher : Zhang, Chunchun; Rechercher : Huang, WenIdentifiant ORCID : https://orcid.org/0000-0002-9772-9492; Rechercher : Zhang, Meng; 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 | quantum dots; absorption; cadmium sulfide; addition reactions; chemical reactions |
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| Résumé | We report on the development of a single-step method for synthesizing colloidal semiconductor magic-size clusters (MSCs) with an enhanced production yield in a single-ensemble form and free of the coproduction of conventional quantum dots (QDs). This process eliminates the need for the second step of a lower-temperature incubation used in a two-step approach reported recently for the fabrication of single-ensemble MSCs without QD contamination. We demonstrate that the combined use of a secondary phosphine (HPR2) and an α-methyl carboxylic acid [RCH(CH3)-COOH, MA] promotes the yield of MSCs and suppresses the nucleation and growth of QDs. With CdO and elemental S powder as Cd and S sources, respectively, a single ensemble of CdS MSC-311 (displaying a sharp absorption peak at 311 nm) evolves directly in a reaction in 1-octadecene with an enhanced production yield. This study introduces a one-step avenue for synthesizing effectively and selectively single-ensemble MSCs and improves our understanding of the two-pathway model proposed for the prenucleation stage of QDs. |
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| Date de publication | 2019-05-13 |
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| Maison d’édition | American Chemical Society |
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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 | d496935b-314c-49e5-a091-18d10ed1aaac |
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| Enregistrement créé | 2021-05-06 |
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| Enregistrement modifié | 2021-05-06 |
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