Coadsorption of sodium and water on MgO(100)/Mo(100) studied by ultraviolet photoelectron and metastable impact electron spectroscopies

The coadsorption of D2O and Na on the MgO(100)/Mo(100) surface has been studied by metastable impact electron spectroscopy and ultraviolet photoelectron spectroscopy (He I). The initial layer of D2O adsorbed on the MgO(100) surface at 100 K “wets” the surface. For multilayer adsorption, the outermost water molecules exhibit an electronic structure which is very similar to gas phase water. Na dosed onto a D2O- precovered MgO surface leads to the formation of a hydroxide species, most likely NaOH. This hydroxide species is stable to 530 K.

[1]  H. Ozaki,et al.  Electron Spectroscopy Using Metastable Atoms as Probes for Solid Surfaces. , 1997, Chemical reviews.

[2]  J. Günster,et al.  Cs adsorption on oxide films (Al2O3, MgO, SiO2) , 1997 .

[3]  D. Goodman,et al.  Structure and geometry of water adsorbed on the MgO(100) surface , 1997 .

[4]  J. Günster,et al.  The analysis of surface-adsorbed organic molecules by alkali-assisted MIES combined with UPS(He I) , 1996 .

[5]  W. Possart,et al.  Characterization of triazine derivatives on silicon wafers studied by photoelectron spectroscopy (XPS, UPS) and metastable impact electron spectroscopy (MIES) , 1996 .

[6]  A. Shluger,et al.  Study of the surface electronic structure of MgO bulk crystals and thin films , 1996 .

[7]  H. Weiss,et al.  Observation of the second ordered phase of water on the MgO(100) surface: Low energy electron diffraction and helium atom scattering studies , 1996 .

[8]  J. P. Cowin,et al.  Imaging insulating oxides: scanning tunneling microscopy of ultrathin MgO films on Mo(001) , 1995 .

[9]  M. Parrinello,et al.  Ab initio molecular dynamics of H2O adsorbed on solid MgO , 1995 .

[10]  J. Günster,et al.  The study of surface adsorbed C60 molecules with metastable impact electron spectroscopy and UPS (He I) , 1995 .

[11]  A. Borisov,et al.  Singlet-to-triplet conversion in low energy metastable helium-metal surface collisions , 1993 .

[12]  Wu,et al.  Electron-energy-loss-spectroscopy studies of thermally generated defects in pure and lithium-doped MgO(100) films on Mo(100). , 1992, Physical review. B, Condensed matter.

[13]  C. A. Estrada,et al.  Synthesis and characterization of ultra-thin MgO films on Mo(100) , 1991 .

[14]  S. Dieckhoff,et al.  Alkali adsorption on W(110) studied by metastable impact electron spectroscopy , 1991 .

[15]  S. Dieckhoff,et al.  Alkali-metal-affected adsorption of CO on W(110) studied by metastable impact electron spectroscopy , 1991 .

[16]  S. Dieckhoff,et al.  Coadsorption of Cs and hydrogen on W(110) studied by metastable impact electron spectroscopy , 1990 .

[17]  L. Tjeng,et al.  Electronic structure of MgO studied by angle-resolved ultraviolet photoelectron spectroscopy , 1990 .

[18]  V. Schmidt,et al.  The photoelectron spectrum of water in the 30 to 140 eV photon energy range , 1986 .

[19]  J. Paul.  UPS spectra of H2O, CH3OH and C5H9OH adsorbed onto Cu(111)/Na and Na(cp) , 1985 .

[20]  Ertl,et al.  Singlet to triplet conversion of metastable He atoms during deexcitation at a Cs-covered surface. , 1985, Physical review letters.

[21]  Arias,et al.  Unusual metastable-quenching spectrum of K/Ni(111) and its explanation by a new quenching mechanism. , 1985, Physical review letters.

[22]  J. Riley,et al.  Ultraviolet photoelectron spectroscopy of the valence bands of solid NH3, H2O, CO2, SO2 and N2O4 , 1982 .

[23]  W. Spicer,et al.  UPS measurements of molecular energy level of condensed gases , 1975 .

[24]  D. W. Turner,et al.  A Discussion on photoelectron spectroscopy - Molecular photoelectron spectroscopy , 1970, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[25]  H. Perkampus.  D. W. Turner: Molecular Photoelectron Spectroscopy. Unter Mitarbeit von C. Baker, A. D. Becker und C. R. Brundle, Wiley-Interscience, John Wiley & Sons Ltd., London, New York, Sydney, Toronto 1970. 386 Seiten. Preis: 140 sh. , 1971 .

[26]  D. Goodman,et al.  The physical and chemical properties of ultrathin oxide films. , 1997, Annual review of physical chemistry.

[27]  A. Yencha,et al.  Penning ionization electron spectroscopy and photo-electron spectroscopy of molecular solids. II. Ammonia and water , 1981 .

[28]  G. Ertl.  Scattering of atomic and molecular beams at metal surfaces , 1979 .

[29]  J. Riley,et al.  The electronic structure of the valence bands of solid NH3 and H2O studied by ultraviolet photoelectron spectroscopy , 1979 .

[30]  I. H. Hillier,et al.  Low energy photoelectron spectroscopy of solids. Aspects of experimental methodology concerning metals and insulators , 1977 .

[31]  A. Yencha,et al.  Penning ionization electron spectroscopy of H2O, D2O, H2S and SO2 , 1977 .