Sökning: "oxide thickness"

Visar resultat 1 - 5 av 173 avhandlingar innehållade orden oxide thickness.

  1. 1. Aqueous Exfoliation of Transition Metal Oxides for Energy Storage and Photocatalysis Applications : Vanadium Oxide and Molybdenum Oxide Nanosheets

    Författare :Ahmed S. Etman; Junliang Sun; Yury Gogotsi; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; aqueous exfoliation; vanadium oxide nanosheets; molybdenum oxide nanosheets; energy storage; photocatalysis; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : Two-dimensional (2D) transition metal oxides (TMOs) are a category of materials which have unique physical and chemical properties compared to their bulk counterparts. However, the synthesis of 2D TMOs commonly includes the use of environmental threats such as organic solvents. LÄS MER

  3. 2. CVD and ALD of Group IV- and V-Oxides for Dielectric Applications

    Författare :Katarina Forsgren; Steven George; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; CVD; ALD; Dielectric constant; Tantalum oxide; Ta2O5; Zirconium oxide; ZrO2; Hafnium oxide; HfO2; QCM; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : Due to the constantly decreasing dimensions of electronic devices, the conventional dielectric material in transistors and capacitors, SiO2, has to be replaced by a material with higher dielectric constant. Some of the most promising candidates are tantalum oxide,Ta2O5, zirconium oxide, ZrO2 and hafnium oxide, HfO2. LÄS MER

  4. 3. Gastrointestinal mucosal protective mechanisms : Mudolatory effects of Heliobacter pyroli on the gastric mucus gel barrier and mucosal blood flow in vivo

    Författare :Christer Atuma; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Physiology and anatomy; mucus gel layer; mucosal blood flow; mucus thickness; chronic infection; rat; platelet activating factor; mast cell; nitric oxide; nitric oxide synthase; ketotifen; intra-vital microscopy; microelectrode; laser-Doppler flowmetry; L-NNA; Fysiologi och anatomi; Physiology and pharmacology; Fysiologi och farmakologi; Physiology; fysiologi;

    Sammanfattning : The gastrointestinal mucus gel layer and blood flow are two important mechanisms for protection at the pre-epithelial and sub-epithelial levels, respectively. Helicobacter pylori might circumvent these mechanisms and elicit a chronic inflammatory response with consequent ulcers in the stomach and duodenum. LÄS MER

  5. 4. Aspects on luminal nitric oxide in relation to oesophageal acid exposure and mucosal integrity

    Författare :Mogens Bove; Göteborgs universitet; []
    Nyckelord :nitric oxide; nitric oxide synthase; acid; gastro-esophageal reflux disease; membrane potentials; saliva; nitrate; blood flow; ferret; histopathology;

    Sammanfattning : Nitric oxide (NO) exerts important neuromuscular control of the oesophagus, but little is known about the sources and effects of the NO present in the distal oesophageal lumen. These questions were presently addressed in both human and animal experiments. LÄS MER

  7. 5. Protective and Nanoporous Alumina Films Studied in situ by X-ray and Electrochemical Methods

    Författare :Jonas Evertsson; NanoLund: Centre for Nanoscience; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; XRR; XPS; XRF; GTSAXS; EIS; Synchrotron Radiation; Native oxide; Anodization; Anodic aluminum oxide; Nanoporous aluminum oxide; Single crystal; Aluminum alloys; in situ; Fysicumarkivet A:2018:Evertsson;

    Sammanfattning : In this thesis, the studies of native and anodic oxides on both aluminum model single crystal surfaces as well as on aluminum alloys found in applications are presented. The focus has been on the characterization in situ as the oxide is growing by an electrochemical process called anodization. LÄS MER