Journal
NANO RESEARCH
Volume 10, Issue 4, Pages 1149-1162Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-016-1287-3
Keywords
zinc-blende; core/shell; quantum dots; thick shells
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Funding
- National Natural Science Foundation of China [21233005, 91433204]
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A one-pot/three-step synthetic scheme was developed for phase-pure epitaxy of CdS shells on zinc-blende CdSe nanocrystals to yield shells with up to sixteen monolayers. The key parameters for the epitaxy were identified, including the core nanocrystal concentration, solvent type/composition, quality of the core nanocrystals, epitaxial growth temperature, type/concentration of ligands, and composition of the precursors. Most of these key parameters were not influential when the synthetic goal was thin-shell CdSe/CdS core/shell nanocrystals. The finalized synthetic scheme was reproducible at an almost quantitative level in terms of the crystal structure, shell thickness, and optical properties.
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