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QSQ is a group of water soluble alloy CdSSe/ZnS or CdSe/ZnS core/shell quantum dots with amphiphilic polymer and polydiallydimethylammounium chloride (PDDA) coating. There is no linkable reactive group on the surface of QSQ. The zeta potential of QSQ is more than +50 mV. Their organic layers consist of a monolayer of oleic acid/octadecylamine, a monolayer of amphiphilic polymer and a monolayer of PDDA. The thickness of the total organic layers is about 8 nm. The hydrodynamic size of the QDs is about 14-16 nm larger than their inorganic core size measured by TEM.
QSQ is very stable in most buffer solutions in the pH range of 5-10.
Catalog No.Quantum Yield1FWHM2Emission PeakAmount(Particle)Price($) 
QSQ-450-02>50%<35 nm450 nm2 nmol299.00
QSQ-450-10>50%<35 nm450 nm10 nmol899.00
QSQ-490-02>50%<35 nm490 nm2 nmol299.00
QSQ-490-10>50%<35 nm490 nm10 nmol899.00
QSQ-525-02>50%<35 nm525 nm2 nmol299.00
QSQ-525-10>50%<35 nm525 nm10 nmol899.00
QSQ-540-02>50%<35 nm540 nm 2 nmol299.00
QSQ-540-10>50 %< 35 nm540 nm10 nmol899.00
QSQ-580-02>50%<25 nm580 nm2 nmol299.00
QSQ-580-10>50%<25 nm580 nm10 nmol899.00
QSQ-600-02>50%<25 nm600 nm2 nmol299.00
QSQ-600-10>50%<25 nm600 nm10 nmol899.00
QSQ-620-02>50%<25 nm620 nm2 nmol299.00
QSQ-620-10>50%<25 nm620 nm10 nmol899.00
QSQ-645-02>50%<35 nm645 nm2 nmol299.00
QSQ-645-10>50%<35 nm645 nm10 nmol899.00
QSQ-665-02>50%<35 nm665 nm2 nmol299.00
QSQ-665-10>50%<35 nm665 nm10 nmol899.00
1. Quantum Yield: measureed using an integrating sphere
2. FWHM: Full Width of Half Maximum

*PDDA:Polydiallyldimethylammonium Chloride
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