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Characterization of QDs with standard methods. Absorbance (a, left panel) and photoluminescence (b, left panel) spectra of CdSe/CdS/ZnS QDs used in this study. High-resolution transmission electron microscopy images of CdSe/CdS/ZnS QDs show nearly spherical crystalline particles with a narrow size distribution and a diameter of ~5 nm (right panel).
