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Low-temperature synthesis of oil-soluble CdSe, CdS, and CdSe/CdS core - Shell nanocrystals by using various water-soluble anion precursors
| Content Provider | Semantic Scholar |
|---|---|
| Author | Pan, Daocheng Wang, Qiang Sheng Jiang, Shichun Ji, Xiangling An, Lijia |
| Copyright Year | 2007 |
| Abstract | Colloidal CdSe and CdS quantum dots were synthesized at low temperatures (60−90 °C) by a two-phase approach at a toluene−water interface. Oil-soluble cadmium myristate (Cd-MA) was used as cadmium source, and water-soluble Na2S, thiourea, NaHSe, Na2SeSO3, and selenourea were used as sulfur and selenium sources, respectively. When a cadmium precursor in toluene and a selenium precursor in water were mixed, CdSe nanocrystals were achieved at a toluene−water interface in the range of 1.2−3.2 nm in diameter. Moreover, we also synthesized highly luminescent CdSe/CdS core−shell quantum dots by a two-phase approach using poorly reactive thiourea as sulfur source in an autoclave at 140 °C or under normal pressure at 90 °C. Colloidal solutions of CdSe/CdS core−shell nanocrystals exhibit a photoluminescence quantum yield (PL QY) up to 42% relative to coumarin 6 at room temperature. |
| Starting Page | 5661 |
| Ending Page | 5666 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/jp0678047 |
| Volume Number | 111 |
| Alternate Webpage(s) | http://nathan.instras.com/MyDocsDB/doc-784.pdf |
| Alternate Webpage(s) | https://doi.org/10.1021/jp0678047 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
