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(a) Valence band X-ray photoelectron spectroscopy spectrum of the scaffold. (b) UV–vis diffuse reflectance spectrum of the scaffold. (c) Plots of (αhυ)2 and photon energy of the scaffold. (d) Schematic mechanism of reactive oxygen species generation by scaffold. (e) Schematic mechanism of ·OH and ·O2− generation by scaffold with laser irradiation.
