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Amine QSA is a group of water soluble alloy CdSSe/ZnS or CdSe/ZnS core/shell quantum dots with amphiphilic polymer and PEG coating. The reactive group is amine. The zeta potential of QSA is from -20mV to +10mV. The organic layers consist of a monolayer of oleic acid/octadecylamine, a monolayer of amphiphilic polymer and a monolayer of PEG. The thickness of the total organic layers is about 6 nm. The hydrodynamic size of the QDs is about 12-14 nm larger than their inorganic core size measured by TEM. QSA is very stable in most buffer solutions in the pH range of 5-10 and can survive autoclaving process (121°C for 30 min). The amine density of QSA is low due to the long PEG chain. Product Name Description Pricing QSA-490 CdSSe/ZnS Quantum Dots w/Amine, 490 nm Pricing QSA-580 CdSSe/ZnS Quantum Dots w/Amine, 580 nm Pricing QSA-540 CdSSe/ZnS Quantum Dots w/Amine, 540 nm Pricing QSA-665 CdSSe/ZnS Quantum Dots w/Amine, 665 nm Pricing QSA-450 CdSSe/ZnS Quantum Dots w/Amine, 450 nm Pricing QSA-645 CdSSe/ZnS Quantum Dots w/Amine, 645 nm Pricing QSA-600 CdSSe/ZnS Quantum Dots w/Amine, 600 nm Pricing QSA-525 CdSSe/ZnS Quantum Dots w/Amine, 525 nm Pricing QSA-620 CdSSe/ZnS Quantum Dots w/Amine, 620 nm Pricing