Sökning: "group-IV oxides"

Hittade 3 avhandlingar innehållade orden group-IV oxides.

  1. 1. 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

  3. 2. Quantum chemical characterization of oxide nanoparticles and interactions on their surfaces

    Författare :Marta Galynska; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cluster models; TiO2 nanoparticles; anatase; rutile; brookite; group-IV oxides; DFT;

    Sammanfattning : Titanium dioxide and related oxide materials have been investigated using density functional theory calculations. Nanocrystalline particles were modelled by a finite cluster approach. LÄS MER

  4. 3. A Theoretical Treatise on the Electronic Structure of Designer Hard Materials

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

    Sammanfattning : 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. LÄS MER