Fig. 2: Surface modifications to determine the catalytic active site of C-dot SOD nanozymes.
From: Deciphering the catalytic mechanism of superoxide dismutase activity of carbon dot nanozyme
a Illustration of C-dots modification. b SOD-like activity change of C-dots before and after passivation, reduction, and re-oxidation. c FT-IR, (d) 1H NMR, and (e) S 2p XPS spectra of C-dots, C-dots-PS and C-dots-PS-HCl. C 1 s high-resolution XPS spectra with identification of peaks by curve fitting of (f) C-dots-NaBH4 and (g) C-dots-NaBH4-HNO3. h 1H NMR spectra of C-dots-NaBH4 and C-dots-NaBH4-HNO3. In (b), P values are determined with one-way ANOVA Tukey’s multiple comparisons test. Data are presented as means ± SD from three independent experiments. Source data are provided as a Source Data file.
