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中文摘要：
基于氢键取代作用，氟离子可以降低巯基乙胺-CdTe量子点之间的团聚，提高量子点的分散性，使量子点的水合粒径随着氟离子浓度的增加而逐渐减小．基于此，本文发展了一种基于动态光散射（DLS）技术检测氟离子的方法，其检出限为20nmoL／L，与荧光方法和传统的氟离子选择性电极相比，其检出限降低了约2个数量级．
英文摘要：
The cystea mine-capped CdTe quantum dots （QDs） undergo spontaneous self-aggregation via NH--N hydrogen bonds. In the presence of F-, the aggregates disassembled due to the substitution of NH--F hydrogen bonds for NH--N hydrogen bonds. Thus, the hydrodynamic size of the QDs aggregates was de- creased gradually as the concentration of F- increased. Here, a one-step sensitive method using dynamic light scattering（DLS） was introduced for directly detection of F-. The detection limit of this method was ca. 20 nmol/L. It was ca. 2 orders of magnitude lower than that of fluorscence methods and F- selective electrode, as reported previously.
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