Sökning: "titanium oxide"

Visar resultat 16 - 20 av 107 avhandlingar innehållade orden titanium oxide.

  1. 16. Titania Nanoscale Films and Surfaces : Surface Science Investigation of Structure and Properties

    Författare :Davide Ragazzon; Anders Sandell; Anne Borg; Jason F. Weaver; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Photoelectron spectroscopy; PES; XPS; scanning tunneling microscopy; STM; titania; titanium oxide; TiO2; Au 111 ; gold; water; H2O; rutile;

    Sammanfattning : This thesis presents surface science studies, investigating several aspects of titanium dioxide at the atomic scale. The greater part of this work is devoted to the preparation by chemical vapor deposition (CVD) of titanium(IV) tetraisopropoxide (TTIP) of ultrathin TiO2 or TiOx films on Au(111). LÄS MER

  3. 17. Charge Transport Properties in Nanostructured Electrodes of Metal Oxides

    Författare :Niclas Beermann; James Durrant; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Iron oxide; titanium dioxide; nanostructured; photoelectrochemistry; charge transport; morphology; incorporation; Fysik; Physics; Fysik; Physical Chemistry; fysikalisk kemi;

    Sammanfattning : In the last decade research in the field of nanostructured metal oxide thin film electrodes for various applications, e.g., solar cells and hydrogen production, has been of great interest. In this thesis, interfacial and bulk electrochemical properties and charge transport properties of nanostructured thin films have been investigated. LÄS MER

  4. 18. CVD and ALD in the Bi-Ti-O system

    Författare :Mikael Schuisky; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Halide-CVD; ALD; Bismuth titanate; Bi4Ti3O12; Titanium oxide; TiO2; Bismuthoxide; Bi2O2.33; Epitaxy; QCM.; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : Bismuth titanate Bi4Ti3O12, is one of the bismuth based layered ferroelectric materials that is a candidate for replacing the lead based ferroelectric materials in for instance non-volatile ferroelectric random access memories (FRAM). This is due to the fact that the bismuth based ferroelectrics consists of pseudo perovskite units sandwiched in between bismuth oxide layers, which gives them a better fatigue nature. LÄS MER

  5. 19. Atom Probe Tomography Investigations of Biologically Relevant Nanoparticles

    Författare :Gustav Eriksson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; surface modification; Nanoparticles; silica; hydroxyapatite; electron microscopy; ligands; atom probe tomography; titanium;

    Sammanfattning : The study of materials at the nanoscale is essential in many scientific disciplines. For example, in materials science the size of the building blocks of a material is directly linked to its properties. LÄS MER

  7. 20. Evaluating Cathode Catalysts in the Polymer Electrolyte Fuel Cell

    Författare :Henrik Ekström; Göran Lindbergh; Anders Lundblad; Anthony Kucernak; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fuel cell; humidity; model electrodes; Nafion; oxygen reduction; PEMFC; platinum; polymer electrolyte; thin film evaporation; titanium oxide; bränslecell; fuktighet; modellelektroder; Nafion; PEMFC; platina; polymerelektrolyt; syrereduktion; tunnfilmsförångning; titanoxid; Electrochemistry; Elektrokemi;

    Sammanfattning : The polymer electrolyte membrane fuel cell (PEMFC) converts the chemical energy of hydrogen and oxygen (air) into usable electrical energy. At the cathode (the positive electrode), a considerable amount of platinum is generally required to catalyse the sluggish oxygen reduction reaction (ORR). LÄS MER