Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 20, Issue 27, Pages 5664-5674Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm00221f
Keywords
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Funding
- National Natural Science Foundation of China [30872630, 50902093]
- Science and Technology Committee of Shanghai [08ZR1415700, 10520706500]
- Ministry of Education of China [200802481131]
- Shanghai Sunny New Technology Development Co., Ltd.
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By using paraffin liquid and oleic acid as the solvent and ligand, highly-fluorescent red to near-infrared (NIR)-emitting cadmium selenium telluride (CdSe1-xTex) alloyed quantum dots (QDs) with photoluminescence quantum yield (PLQY) up to 70% were successfully prepared. The as-prepared CdSe1-xTex QDs also demonstrated good optical stabilities against the temperature change and photobleaching due to their gradient CdTe-rich core/CdSe-rich surface quasi core/shell structure, which was confirmed by studying the alloying process of CdSe1-xTex QDs. Moreover, the as-prepared red to NIR CdSe1-xTex QDs were successfully incorporated into the carboxyl capped porous polystyrene (PS) microbeads to fabricate red to NIR-emitting microbeads with low in vitro cytotoxicity, and the biotinylated goat anti-mouse IgG could be specifically coupled to the optical encoded beads via mouse anti-human chorionic gonadotrophin connected to the carboxyl groups on the encoded microbeads successfully, which suggested promising application of CdSe1-xTex QDs in multiplexed bioassays.
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