| Download | - View final version: One-step approach to single-ensemble CdS magic-size clusters with enhanced production yields (PDF, 3.0 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1021/acs.jpclett.9b01005 |
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| Author | Search for: Zhang, Jing; Search for: Li, Lijia; Search for: Rowell, Nelson1; Search for: Kreouzis, TheoORCID identifier: https://orcid.org/0000-0003-2326-5338; Search for: Willis, Maureen; Search for: Fan, HongsongORCID identifier: https://orcid.org/0000-0003-3812-9208; Search for: Zhang, Chunchun; Search for: Huang, WenORCID identifier: https://orcid.org/0000-0002-9772-9492; Search for: Zhang, Meng; 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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| Format | Text, Article |
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| Subject | quantum dots; absorption; cadmium sulfide; addition reactions; chemical reactions |
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| Abstract | 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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| Publication date | 2019-05-13 |
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| Publisher | American Chemical Society |
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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 | d496935b-314c-49e5-a091-18d10ed1aaac |
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| Record created | 2021-05-06 |
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| Record modified | 2021-05-06 |
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