AgO investigated by photoelectron spectroscopy : Evidence for mixed valence

Michael Bielmann, Patrick Schwaller, Pascal Ruffieux, Oliver Gröning, Louis Schlapbach & Pierangelo Gröning
We present photoelectron spectroscopy investigations of in-situ prepared AgO. The sample was prepared by room temperature oxidation of Ag in an electron cyclotron resonance O2 plasma. In contrast to other measurements based on ex situ prepared AgO powder samples, our investigations show a distinct double peak structure of the O 1s signal with a remarkable chemical shift of 2.9 eV between the two O 1s components. These two components can not be motivated from a...
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