Sökning: "XPS."

Visar resultat 1 - 5 av 217 avhandlingar innehållade ordet XPS..

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

    Författare :Johnny Bustad; Högskolan i Gävle.; [1995]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; adsorbates; shake-up; surface science; XPS; XES; INDO; model systems; NATURAL SCIENCES Physics Atomic and molecular physics Chemical physics; NATURVETENSKAP Fysik Atom- och molekylfysik 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

  2. 2. Surface Characterisation Using ToF-SIMS, AES and XPS of Silane Films and Organic Coatings Deposited on Metal Substrates

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Ulf Bexell; Uppsala universitet.; Högskolan Dalarna.; [2003]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap; materialvetenskap; Materials Science; Materials science; Silanes; Organic films; ToF-SIMS; AES; XPS; Materialvetenskap;

    Sammanfattning : This work focuses on the surface and interfacial characterisation of silane films of a non-organofunctional silane, 1,2-bis(triethoxysilyl)ethane (BTSE), and an organofunctional silane, γ-mercaptopropyltrimethoxysilane (γ-MPS), deposited on Al, Zn and Al-43.4Zn-1.6Si (AlZn) alloy coated steel. LÄS MER

  3. 3. Free Neutral Clusters and Liquids Studied by Electron Spectroscopy and Lineshape Modeling

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Henrik Bergersen; Uppsala universitet.; [2008]
    Nyckelord :Physics; Clusters; Nano-particles; XPS; UPS; AES; Radial structure; Molecular dynamics; Density functional theory; Liquids; Liquid microjet; Solvation; Fysik;

    Sammanfattning : The electronic and geometrical structure of free neutral clusters and liquids have been studied using synchrotron-radiation based photoelectron and Auger electron spectroscopy in combination with lineshape modeling. A novel experimental setup has been developed for studies of liquids, based on the liquid microjet technique. LÄS MER

  4. 4. Silicone biomaterials obtained by plasma treatment and subsequent surface hydrosilylation

    Detta är en avhandling från Stockholm : Fiber- och polymerteknologi

    Författare :Björn Olander; KTH.; [2004]
    Nyckelord :Silicone elastomers; PDMS; XPS; ESCA; surface modification; plasma;

    Sammanfattning : The need for safe and functional implants has led to anincreased demand for improved biomaterials. The performance invivo depends on the interaction between the biologicalsurrounding and the surface of the material. LÄS MER

  5. 5. Silver Alumina Catalysts for Lean NOx Reduction - Influence of Preparation Methods and Type of Reductant, with Transient Kinetic Modelling

    Detta är en avhandling från Stockholm : Fiber- och polymerteknologi

    Författare :Hannes Kannisto; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silver; kinetic modelling; Lean NOx reduction; sol-gel; preparation method; dispersion; cluster; HC-SCR; freeze-dry; XPS; alumina;

    Sammanfattning : The objective of this work was to compare three different preparation methods for silver alumina catalysts for lean NOx reduction. Characteristics such as catalytic activity with propene and n-octane as reductants, chemical state of the silver and silver dispersion were analyzed. LÄS MER