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a) Photographs of CN-dots and CCDs in aqueous media in natural light, and under excitation with a UV lamp (365 nm). b) Emission (blue line) and excitation (black line) spectra of the CN-dots in water, and emission (pink line) and excitation (red line) spectra of the CCDs in water. Quantum yields of c) CCDs and d) CN-dots. Experimental conditions: Slit widths: Ex. 5 nm, Em. 5 nm.
