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Preparation of CdTe Nanocrystals Doped Fluorescent Silica Spheres by Sol-gel Method and Their Surface Modification via Thiol-ene Chemistry

Preparation of CdTe Nanocrystals Doped Fluorescent Silica Spheres by Sol-gel Method and Their Surface Modification via Thiol-ene Chemistry
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摘要 A thcile one-step sol-gel method was used to prepare CdTe nanocrystals(NCs) doped silica microspheres with luxuriant thiol group on their surface using 3-mercaptopropyl trimethoxysilane(MPTMS) as organosilane in the aqueous solution. As the ligand and organosilane, MPTMS ensured the doping efficiency of CdTe NCs by ligand exchange and a large thiol group exposed to the solution to activate the surface of silica microspheres. The remodeled sol-gel process was performed at a lower temperature, which protected the thiol groups from degradation. Meanwhile, the particle size and size distribution can be controlled by varying synthesis conditions, such as the stirring rate and the reaction temperature. This user-friendly method provides a plattbrm tbr immobilization of chemical groups such as carboxyl for combination of bioactive and diagnostic molecules at the surface of CdTe NCs doped silica micro- spheres through thiol-ene chemistry for high-throughput microarrays. A thcile one-step sol-gel method was used to prepare CdTe nanocrystals(NCs) doped silica microspheres with luxuriant thiol group on their surface using 3-mercaptopropyl trimethoxysilane(MPTMS) as organosilane in the aqueous solution. As the ligand and organosilane, MPTMS ensured the doping efficiency of CdTe NCs by ligand exchange and a large thiol group exposed to the solution to activate the surface of silica microspheres. The remodeled sol-gel process was performed at a lower temperature, which protected the thiol groups from degradation. Meanwhile, the particle size and size distribution can be controlled by varying synthesis conditions, such as the stirring rate and the reaction temperature. This user-friendly method provides a plattbrm tbr immobilization of chemical groups such as carboxyl for combination of bioactive and diagnostic molecules at the surface of CdTe NCs doped silica micro- spheres through thiol-ene chemistry for high-throughput microarrays.
出处 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2017年第3期327-332,共6页 高等学校化学研究(英文版)
基金 Supported by the National Program on Key Research & Development Program Sub-project, China(No.2016YFC0800901- Z01 ) and the National Natural Science Foundation o f China(Nos.21271082, 21301066, 21371068, 21401073).
关键词 Fluorescent silica sphere Semiconductor nanocrystal Sol-gel method Fluorescent silica sphere Semiconductor nanocrystal Sol-gel method
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