Sökning: "core-level"

Visar resultat 21 - 25 av 79 avhandlingar innehållade ordet core-level.

1. 21. Photoelectron spectroscopy on III-V semiconductors : valence bands, core levels and core excitons

   Författare :Henric Oscarsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; InP 110 :As; surface; InAs; valence band; MBE; photoelectron spectroscopy; core level; core exciton; semiconductor; GaAs 111 A;

   Sammanfattning : .... LÄS MER

3. 22. Chemical Bonding of Hydrocarbons to Metal Surfaces

   Författare :Henrik Öström; Anders Nilsson; Phil Woodruff; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Adsorption; hydrocarbon; core-level; spectroscopy; Physics; Fysik;

   Sammanfattning : Using x-ray absorption spectroscopy (XAS), x-ray emission spectroscopy (XES) and x-ray photoelectron spectroscopy (XPS) in combination with density functional theory (DFT) the changes in electronic and geometric structure of hydrocarbons upon adsorption are determined. The chemical bonding is analyzed and the results provide new insights in the mechanisms responsible for dehydrogenation in heterogeneous catalysis. LÄS MER

4. 23. Electronic Properties of Metal Oxide Films Studied by Core Level Spectroscopy

   Författare :Jan Hinnerk Richter; Anders Sandell; Håkan Rensmo; Anne Borg; Uppsala universitet; []
   Nyckelord :Physics; electron spectroscopy; metal oxide; chemical vapour deposition; ion insertion; metal organic; band alignment; zirconium; titanium; silicon; high k; Fysik;

   Sammanfattning : In this dissertation core level electron spectroscopy has been employed to study various aspects of metal oxide films grown under ultra-high vacuum conditions. Studies on in situ ion insertion of lithium into thin TiO2 systems were performed. LÄS MER

5. 24. Computational studies of core level XPS satellites in transition metal systems : Department of Quantum Chemistry, Uppsala University

   Författare :Johnny Bustad; Högskolan i Gävle; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; adsorbates; shake-up; surface science; XPS; XES; INDO; model systems; Chemical physics; Kemisk fysik;

   Sammanfattning : Upon core ionization of a free molecule or a molecule adsorbed on a metal surface, higher binding energy satellites are observed, so called "shake-up" satellites, which can be viewed as valence excitations simultaneously to the creation of the core hole. In this thesis, theoretical studies of such core level XPS satellites in transition metal systems are presented, as well as cluster calculations of XES spectra, using the quantum mechanical INDO method. LÄS MER

7. 25. Computional studies of core level XPS satellites in transition metal systems

   Författare :Johnny Bustad; Uppsala universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : .... LÄS MER