Sökning: "chemical vapour deposition"

Visar resultat 21 - 25 av 66 avhandlingar innehållade orden chemical vapour deposition.

  1. 21. Deposition of Al-doped ZnO films by high power impulse magnetron sputtering

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Martin Mickan; David Horwat; Ulf Helmersson; Aline Rougier; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Transparent conducting oxides (TCOs) are an important class of materials with many applications such as low emissivity coatings, or transparent electrodes for photovoltaics and flat panel displays. Among the possible TCO materials, Al-doped ZnO (AZO) is studied due to its relatively low cost and abundance of the raw materials. LÄS MER

  2. 22. Development and Evaluation of a Denuder-Filter System Designed for Sampling Diisocyanate Aerosols

    Detta är en avhandling från Stockholm : Institutionen för analytisk kemi

    Författare :Yvonne Nordqvist; Ulrika Nilsson; Peter Haglund; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cylindrical denuder; Diisocyanate; TDI; HDI; IPDI; MDI; Chemosorption; Vapour particle distribution; Aerosol sampling; NATURAL SCIENCES Chemistry Analytical chemistry; NATURVETENSKAP Kemi Analytisk kemi;

    Sammanfattning : There are many occupational environments in which isocyanates or PUR-products are used, produced or processed. During these operations there is always a risk of isocyanate exposure, which may lead to severe health problems. Isocyanates principally affect the respiratory system and they are the main cause of occupational asthma. LÄS MER

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

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Jan Hinnerk Richter; Anders Sandell; Håkan Rensmo; Anne Borg; [2006]
    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

  4. 24. Carbon Nanotube Transistors: Nanotube Growth, Contact Properties and Novel Devices

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Johannes Svensson; Göteborgs universitet.; Gothenburg University.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carbon nanotube; chemical vapour deposition; Field effect transistor; Marangoni convection; Schottky barrier;

    Sammanfattning : Carbon nanotubes (CNTs) are envisioned to be used as the basic building blocks in future electronics due to their excellent electronic properties such as high mobility, compatibility with high-k dielectrics and small diameters resulting in advantageous electrostatics. This thesis is divided into three separate topics related to increasing the fabrication yield and performance of CNT field effect transistors (CNTFETs). LÄS MER

  5. 25. Electron transport properties of graphene and graphene field-effect devices studied experimentally

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Youngwoo Nam; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; dual-gated graphene field effect devices; thermopower; quantum Hall effect; graphene; Aharonov-Bohm effect; chemical vapour deposition;

    Sammanfattning : This thesis contains experimental studies on electronic transport properties of graphene with the Aharonov-Bohm (AB) effect, thermopower (TEP) measurements, dual-gated graphene field effect devices, and quantum Hall effect (QHE). Firstly, in an effort to enhance the AB effect in graphene, we place superconducting-metal (aluminium) or normal-metal (gold) mirrors on the graphene rings. LÄS MER