CdSe/ZnS core-shell type quantum dots carboxylic acid functionalized, fluorescence λem 620 nm, 1 mg/mL in H2O

The organic layers 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 about 4 nm and they find applications in bioimaging and biosensing