水溶性量子点的制备及其 pH 响应性的研究

摘要

In this paper,due to the unique optical properties,water-soluble CdSe/CdS/ZnS multilayer core shell QDs/DADA with stable fluorescence property were synthesized based on ligand-exchange method between quantum dots and 1,12-Dodecanediamine(DADA),then were dissolved in aqueous solution of different pH val-ues.The testing results showed that QDs/DADA solution has photoresponse to the pH value,which fluores-cence intensities increased and subsequently decreased gradually with the enhancement of pH values.%采用1,12-二胺十二烷(DADA)与多层核壳CdSe/CdS/ZnS 量子点通过相转移与配体交换技术制备出水溶、荧光性能稳定的 QDs/DADA.将其溶解在pH 值不同的水溶液中,通过测试发现 QDs/DADA 水溶液对 pH 值具有光响应性,其荧光性能随着 pH 值的增加先增强后减弱.