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In situ evidence of the redox state dependence of photoluminescence in graphene quantum dots

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Academic year: 2020

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Figure 1. Microscopy characterization of GQD: (A) TEM image and corresponding lateral size  distribution of GQD; (B) AFM image with height profile and corresponding thickness
Figure 2A shows CV and voltabsorptogram (VA) at 385 nm recorded during the potential scan  in a 0.00145 mg L -1  GQD solution in 0.1 M LiClO 4 , using an integration time of 200 ms
Figure  3. (A) PL emission spectra during the cathodic scan;  (B)  PL intensity change  with  respect to the initial emission  spectrum at -0.20 V  during the cathodic scan:  (C) PL emission  spectra during the anodic scan; and (D) PL intensity change with

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