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Different Mixing Types CdSe‐CdS Nanocomposites

The optical properties of 2 mixing types of CdS‐CdSe nanoparticles (i.e., coprecipitated CdS‐CdSe nanoparticles, CdS‐coated CdSe (CdSe/CdS)) were studied. Results indicated that the co‐precipitated nanoparticles kept the similar optical properties of both CdS and CdSe's, while the CdS/CdSe core‐shell structure showed totally different optical properties from the simple components. We paid special attention to the core/shell structure, as the core‐shell structure showed a better passivating effect. Therefore, the XRD and TEM were tested on the core‐shell structure. XRD results showed that the diffraction patterns of core‐shell structure were roughly the same as their simple components. And the TEM indicated the core‐shell structure had a uniform dispersion in the solution.