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. 2017 Sep 25;8:682. doi: 10.1038/s41467-017-00582-9

Fig. 4.

Fig. 4

a Femtosecond ultraviolet photoelectron spectroscopy (fs-UPS) spectra of Se (red), TiO2 (green), and ZnMgO (blue) under flat-band conditions. b Valence band and conduction band lineups extracted from the fs-UPS and optical absorption spectra