Fig. 4
From: Revealing hole trapping in zinc oxide nanoparticles by time-resolved X-ray spectroscopy

Ground state and transient Kα and Kβ RXES. The ground state Zn Kα (a) and Zn Kβ (b) RXES spectra of 32 nm ZnO nanoparticles in aqueous colloidal solution. The transient Zn Kα (c) and Zn Kβ (d) RXES spectra of 32 nm ZnO nanoparticles in colloidal solution measured 80 ps after photoexcitation at 355 nm with a fluence of 80 mJ/cm2. In c, d, red indicates positive and blue indicates negative changes