One-pot/three-step synthesis of zinc-blende CdSe/CdS core/shell nanocrystals with thick shells
zinc-blende, core/shell, quantum dots, thick shells
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.
Tsinghua University Press
Yuan Niu,Chaodan Pu,Runchen Lai,Renyang Meng,Wanzhen Lin,Haiyan Qin,Xiaogang Peng, One-pot/three-step synthesis of zinc-blende CdSe/CdS core/shell nanocrystals with thick shells. NanoRes.2017, 10(4): 1149–1162