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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Polyhedral Oligomeric Silsesquioxane as a Ligand for CdSe Quantum Dots
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Polyhedral Oligomeric Silsesquioxane as a Ligand for CdSe Quantum Dots

机译:多面体低聚倍半硅氧烷作为CdSe量子点的配体

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We report the synthesis of CdSe quantum dots (QDs) using a mercapto-substituted polyhedral oligomeric silsesquioxane (SH-POSS). The bulky siloxane cage-like core of the ligand makes this an ideal steric stabilizer, and comparison with conventional branched alkyl phosphonic acid capped CdSe QDs shows SH-POSS capped QDs to have superior optical properties including photoluminescence quantum efficiencies and fluorescence lifetimes. The POSS shell allows for the access of small electrolyte ions and electron transport from the surface of the QDs, evidenced by better performance as a photosensitizer in conjunction with a titania nanotube array electron acceptor in comparison to the conventionally stabilized QDs.
机译:我们报告使用巯基取代的多面体低聚倍半硅氧烷(SH-POSS)合成CdSe量子点(QDs)。配体的庞大的笼状硅氧烷笼状核心使其成为理想的空间稳定剂,与常规的支链烷基膦酸封端的CdSe QD进行比较显示,SH-POSS封端的QD具有优异的光学性能,包括光致发光量子效率和荧光寿命。 POSS外壳允许从QD的表面访问较小的电解质离子和进行电子传输,与常规稳定的QD相比,与二氧化钛纳米管阵列电子受体结合使用时,光敏剂具有更好的性能,这证明了POSS外壳。

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