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. 2024 Jul 12;22:412. doi: 10.1186/s12951-024-02683-2

Fig. 1.

Fig. 1

Characterization of GSH-CDs. (a) TEM image and (b) size distribution of the GSH-CDs (Scale bar = 100 nm). (c) Hydrated particle size (left) and zeta potential (right) of GSH-CDs. (d) XRD pattern of GSH-CDs. (e) UV‒visible absorption and fluorescence emission spectra of GSH-CDs. (f) FT-IR spectra of GSH and GSH-CDs. (g) XPS spectrum of GSH-CDs. (h) XPS Fe 2p spectra of GSH-CDs. (i) XPS S 2p spectra of GSH-CDs