One-pot/three-step synthesis of zinc-blende CdSe/CdS core/shell nanocrystals with thick shells |
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Authors: | Yuan Niu Chaodan Pu Runchen Lai Renyang Meng Wanzhen Lin Haiyan Qin Xiaogang Peng |
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Affiliation: | Center for Chemistry of Novel and High-Performance Materials, and Department of Chemistry, Zhejiang University, Hangzhou 310027, China |
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Abstract: | 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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Keywords: | zinc-blende core/shell quantum dots thick shells |
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