| Summary: | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2008. === Includes bibliographical references. === Colloidal semiconductor nanocrystals or quantum dots have attracted much attention recently with their unique optical properties. Here we present a novel approach to synthesize ZnTe/ZnSe core/shell tunable quantum dots. Characterizations such as transmission electron microscopy, wavelength dispersive X-ray spectroscopy, powder x-ray diffraction are employed to give evidence for the core/shell structure. Absorption, and photoluminescence spectra demonstrate the tunability of this ZnTe/ZnSe core/shell system, and fluorescence lifetime decays suggest a core/shell structure is made. === by Juan Guan. === S.M.
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