Search for dissertations about: "transition metal oxides"

Showing result 11 - 15 of 73 swedish dissertations containing the words transition metal oxides.

  1. 11. A Theoretical Treatise on the Electronic Structure of Designer Hard Materials

    Author : Håkan Wilhelm Hugosson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; electronic structure; density functional theory; transition metal carbides; transition metal oxides; hard materials; designer materials; Fysik; Physics; Fysik; fysik; Physics;

    Abstract : The subject of the present thesis is theoretical first principles electronic structure calculations on designer hard materials such as the transition metal carbides and oxides. The theoretical investigations have been made in close collaboration with experimental research and have addressed both bulk electronic properties and surface electronic properties of the materials. READ MORE

  2. 12. Advanced Nanostructured Transition Metal Oxide Semiconductors for Solar Energy Applications

    Author : Pedram Ghamgosar; Alberto Vomiero; Nils Almqvist; Federica Rigoni; Mauro Salvatore Epifani; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Metal Oxide; Photovoltaic; Semiconductors; Self-powered photodetectors; Photoelectrochemical cell; Solar fuel; Water splitting; Experimentell fysik; Experimental Physics;

    Abstract : Increasing energy consumption and its environmental impacts make it necessary to look for alternative energy sources. Solar energy as huge energy source that can cover the terms sustainability is considered as a favorable alternative. READ MORE

  3. 13. Asymmetric Hydrogenations : Syntheses of Ligands and Expansion of Substrate Scope

    Author : Pradeep Cheruku; Pher Andesson; Jay Siegel; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Catalysis; Asymmetric; Hydrogenations; Reductions; Olefins; Imines; Enol phosphinates; Transition metal; Complexes; Iridium; Enamines; Ruthenium; Ligands; Trifluoromethyl; Diphenylvinylphosphine oxides; Vinyl phosphonates; Chemistry; Kemi;

    Abstract : Asymmetric hydrogenation has emerged as a versatile methodology to obtain a wide range of chiral precursors. This thesis focused on the synthesis of new chiral ligands and the expansion of the substrate scope of asymmetric hydrogenations. READ MORE

  4. 14. Atomic short-range order, optical and electronic properties of amorphous transition metal oxides : An experimental and theoretical study of amorphous titanium aTiO2 and tungsten aWO3 solid thin-film oxides

    Author : Carlos A Triana; Tomas Edvinsson; Petter Persson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; X-ray-Absorption; Reverse Monte Carlo; Molecular dynamics; Electronic structure;

    Abstract : Amorphous transition metal oxides [aTMOs], have emerged as innovative functional materials for wide-ranging electronic, optical and energy-related applications. However, no systematic and broadly applicable method exists to assess their atomic-scale correlations, and since the optical and electronic processes are local structure-dependent, still there are not well-stablished mechanisms that suitably explain the physical properties of aTMOs. READ MORE

  5. 15. Quantum photoelectrochemistry : Theoretical studies of organic adsorbates on metal oxides surfaces

    Author : Petter Persson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum chemistry; Quantum chemistry; photoelectrochemistry; metal oxide surfaces; organic adsorbates; Kvantkemi; Quantum chemistry; Kvantkemi; Quantum Chemistry; kvantkemi;

    Abstract : Interactions between organic molecules and transition metal oxide surfaces have been investigated by means of quantum chemical calculations. The studies have been aimed at understanding electrode-adsorbate interactions in photoelectrochemical devices, such as dye-sensitized solar cells. READ MORE