CdSe/ZnS core-shell type quantum dots carboxylic acid functionalized, fluorescence λem 645 nm, 1 mg/mL in H2O

The organic layer of the CdS/ZnS or CdSe/ZnS quantum dots (QDs) with carboxylic acid as reactive group consist of a monolayer of oleic acid/octadecylamine and a monolayer of amphiphilic polymer. The total thickness of organic layers on these QDs is approximately 4 nm. They find many applications in bioimaging and biosensing.