In situ photoelectron spectroscopy studies in ultrahigh vacuum of the electronic structure of the surface of molybdenum oxidized in air and during the adsorption of sodium Na with submonolayer coatings were carried out. The spectra of photoemission from the valence band and the core levels O 1s, O 2s, Mo 4s and Na 2p were studied under synchrotron excitation in the photon energy range of 80 – 600 eV. The change in the spectrum of the oxygen core levels associated with the substitution of hydrogen atoms in the hydroxyl group by sodium atoms was found. The surface topography and cathodoluminescence of molybdenum oxide were studied.
The electronic structure of gold nanoparticles deposited on the surface of tungsten before and after the adsorption of sodium atoms followed by heating at T = 630 K was studied in situ in ultrahigh vacuum by photoelectron spectroscopy. The photoemission spectra from the valence band and core levels of Au 4f and Na 2p were studied under synchrotron excitation in the photon energy range 80-600 eV. It was shown that changes in the spectra of the valence band and core levels of Au 4f and Na 2p are associated with a change in the surface topography caused by the adsorption of sodium atoms and heating, which led to an increase in the surface area by several times. The surface topography and cathodoluminescence of a layer of gold nanoparticles deposited on a tungsten surface are studied
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