Characterization of CdSe Nanocrystals and their Interaction with Micellar Aggregates by Means of Capillary Electrophoretic Techniques

摘要

Stable water soluble surfactant coated CdSe nanocrystals with trioctylphosphine (TOP) were obtained by a process of dynamic surface coating with cationic, anionic, and non-ionic surfactants. The surfactant-coated CdSe/TOP nanocrystals were characterized by complementary techniques of UV-VIS and photo-luminescence spectrophotometry, as well as by means of a capillary zone electrophoretic technique. The results revealed an integral relationship between the degree of change in photoluminescence and shift in migration in capillary electrophoresis for surfactant-coated CdSe/TOP nanocrystals. Therefore, the combination of electrophoresis and spectrophotometry can serve as valuable techniques for the measurement of such surface modifications on quantum dot nanocrystals.