Stability and removal of water soluble CdTe quantum dots in water
Stability and removal of water soluble CdTe quantum dots in water
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DOI：
10.1021/es0714991
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发表时间：
2008-01-01
影响因子：
11.4
通讯作者：
Crittenden, John C.
中科院分区：
文献类型：
--
作者：
Zhang, Yang;Chen, Yongsheng;Crittenden, John C.
量子点（QDs）的商业使用将导致它们进入水生环境。本研究考察了巯基乙酸盐盖层配体在水中的CdTe量子点的特性和稳定性，以及明矾对量子点的去除作用。质子化巯基乙酸盖层配体导致量子点聚集。量子点的稳定性更多地取决于它们在水中的离子组成，而不是离子强度。在KCl溶液中，即使在0.15 M离子强度下，量子点也保持稳定。浓度相对较低(
Commercial use of quantum dots (QDs) will lead to their entry into aquatic environments. This study examines the characteristics and stability of CdTe QDs with thioglycolate capping ligands in water as well as their removal by alum The capping ligands of QDs are a key factor in determining their fate in water. Protonated thioglycolate capping ligands cause QDs to aggregate. The stability of QDs depends more their ionic composition in water than on the ionic strength. In KCl solution, QDs remain stable even under 0.15 M ionic strength. Relatively low concentrations (