Fig. 1: Morphological and structural characterization of CQDs-OH, CQDs-CHO, and CQDs-COOH. | Nature Communications

Fig. 1: Morphological and structural characterization of CQDs-OH, CQDs-CHO, and CQDs-COOH.

From: Oxygen functionalization of carbon quantum dots enables efficient acidic hydrogen peroxide electrosynthesis

Fig. 1: Morphological and structural characterization of CQDs-OH, CQDs-CHO, and CQDs-COOH.

a Synthetic strategy for CQDs. TEM and AFM images with their corresponding lateral size distributions and height profiles of b CQDs-COOH, c, CQDs-OH, d CQDs-CHO. Scale bars of TEM, 20 nm; those of HR-TEM, 1 nm. e ATR-IR spectra of the CQDs. f Elemental composition and carbon hybridization as derived from the XPS survey spectra and the deconvoluted C 1 s spectra, respectively. g NEXAFS at the C K-edge, and h deconvoluted C K-edge spectra of the 1 s → π* transition, and i comparison of the sp3-C/sp2-C ratio derived from the deconvoluted NEXAFS spectra. Source data for this figure are provided in the Source Data file.

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