QYH is a group of water soluble alloy CdSSe/ZnS or CdSe/ZnS core/shell quantum dots with amphiphilic polymer coating in lyophilized solid form. QYH can be reconstituted in DI water or DMSO to any desired concentration so you can do your reaction in the solvent system of your choice.
The reactive group of QYH is carboxylic acid. The zeta potential of QYH is from -30mV to -50mV. Their organic layers consist of a monolayer of oleic acid/octadecylamine and a monolayer of amphiphilic polymer. The thickness of the total organic layers is about 4 nm. The hydrodynamic size of the QDs is about 8-10 nm larger than their inorganic core size measured by TEM.
Reconstituted QYH is very stable in most buffer solutions in the pH range of 5-10.