Abstract
High-quality CdSe quantum dots (QDs) were synthesized in a mixture of paraffin liquid and oleic acid (OA), and the effects of the synthetic conditions, including the growth temperature, precursor concentration, and initial OA:Cd molar ratio, on the optical properties of the as-prepared CdSe QDs were systematically investigated. The thermal stability and the effects of the nanocrystal (NC) purification on the optical properties of the as-prepared CdSe QDs were also studied for their further bioapplication. The results demonstrate that the CdSe QDs have good thermal stability and a high photoluminescence quantum yield (PLQY) after NC purification, which is very important for their bioapplication. Moreover, optically encoded microbeads have been successfully prepared by directly embedding the as-prepared oil soluble CdSe QDs into the carboxyl group-capped porous polystyrene (PS) beads through our route, which suggests their promising application in multiplexed bioassays.
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