Fig. 2: Measured O 1s core level spectra.
From: Role of hydroxylation for the atomic structure of a non-polar vicinal zinc oxide

a O 1s of ZnO(\(10\bar{1}4\)) for the as prepared surface measured in normal- and b grazing emission. c O 1s after exposure to 1 L D2O at room temperature, grazing emission. Black dots: measured data. Red line: fitted spectra. Shaded peaks: fitted components as labeled in the figure. Inset: Peak area of the XPS O 1s OC component, normalized to the water saturated spectrum, as a function of time in 1 ⋅ 10−10 mbar residual gas, mainly composed of H2 and H2O. Line to guide the eye.