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PL of organic pigment micronanocrystals. (a) Normalized PL spectra of various organic pigment micronanocrystals. The inset shows a photo of two cuvettes under ultraviolet illumination. (b) Absorbance and emission spectra of quinacridone nanocrystals in solution and of the single nanocrystal (NC) shown by the electron micrograph in the inset. (c) Stability test of an epindolidione nanocrystal film in acidic environment, compared to that of standard CdSe/ZnS core/shell nanocrystals.
