Fig. 3 | Scientific Reports

Fig. 3

From: Manganese oxide (MnOx) as peroxidase-mimicking nanozymes with valence-dependent activity for single-use colorimetric bioassays

Fig. 3

(a) UV–Vis absorption spectra of TMB + H2O2, TMB + Mn3O4, and TMB + H2O2 + Mn3O4 solutions. (b) Catalytic performance comparison with MnO, Mn3O4 and Mn2O3 as POD-like nanozyme. (c) Fluorescence emission spectra revealing the generation of •OH through the catalytic reaction using TA as a fluorescent probe. (d) The calalytic mechanism of Mn3O4. POD-like activity of Mn3O4 nanozyme against (e) pH value, (f) reaction temperature, and (g) storage time.

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