Synthesis of multi-shell nanocrystals by a single step coating process

We synthesized CdSe/CdS/ZnS core/multi-shell nanocrystals through a single coating step by using different growth rates of CdS and ZnS crystalline layers on CdSe cores. The resulting nanocrystals exhibited a controlled redshift from the initial photoluminescent (PL) emission of CdSe cores with much improved quantum yield (QY above 70%).