Sökning: "dielectric function"

Visar resultat 1 - 5 av 71 avhandlingar innehållade orden dielectric function.

  1. 1. Dielectric properties of poly(ethyelene-co-butyl acrylate) filled with Alumina nanoparticles

    Författare :Nadejda Jäverberg; Hans Edin; Eva Mårtensson; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanocomposites; poly ethylene-co-butyl acrylate ; EBA; alumina; dielectric permittivity; absorbed water; humidity; temperature; dielectric spectroscopy; partial discharge; electrical treeing; Electrical engineering; Elektroteknik;

    Sammanfattning : In this work dielectric properties of the poly(ethylene-co-butyl acrylate)filled with alumina nanoparticles are evaluated. These nanocomposite materialswere manufactured at the department of Fibre and Polymer Technology,KTH.This study is limited to the properties of general importance for the AC applications. LÄS MER

  2. 2. Studies of Dielectric Relaxation in Solid Polymers and Composites

    Författare :Mohsen Safari Ardi; Chalmers University of Technology; []
    Nyckelord :dielectric permittivity; time-domain dielectric relaxation; composite; carbon black; poly vinylidene fluoride ; interfacial polarization; poly vinyl chloride ; coated carbon fibre; epoxy; poly methyl methacrylate ; nitrile butadiene rubber; ethylene-vinyl acetate copolymer; polyamide 6;

    Sammanfattning : Non-linear characteristics of homogeneous solid polymers and solid polymer-based composites have been studied both experimentally and theoretically. In particular experimental studies of non-linear dielectric response of six homogeneous solid polymeric materials and the influence of the composition on the properties of solid polymer-based composites with high dielectric permittivities have been carried out and a theoretical study of dipole-dipole interaction in solids based on a formulation due to P. LÄS MER

  3. 3. Alloy Plasmonics - Fundamentals and Application in Catalysis

    Författare :Christopher Tiburski; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CO oxidation; nanoparticles; gold; heterogeneous catalysis; LSPR; nanoalloys; nanofabrication; light; dielectric function; palladium;

    Sammanfattning : Alloys have for a long time been important in the development of our society; from the bronze age, where man learned how to alloy copper with tin, to today, where many products are made of steel and aluminum alloys. Similarly, but maybe not as generally well known, also in heterogeneous catalysis alloys are explored to develop solutions to increase activity and selectivity of chemical processes. LÄS MER

  4. 4. Alloy Plasmonics - Fundamentals and Applications

    Författare :Christopher Tiburski; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; palladium-hydride; heterogeneous catalysis; nanoalloys; sensing; photothermal; gold-palladium; plasmonics; dielectric function; nanothermometry; CO oxidation;

    Sammanfattning : Alloys have for a long time been important in the development of our society; from the Bronze Age, where man learned how to alloy copper with tin, to today, where many products are made of steel and aluminum alloys. Similarly, but maybe not as generally well known, alloys have lately been proposed as a new paradigm in nanophotonics, to tailor optical properties of nanomaterials that find applications within telecommunication, sensing, or biotechnology. LÄS MER

  5. 5. First-Principles Study on Electronic and Optical Properties of Copper-Based Chalcogenide Photovoltaic Materials

    Författare :Rongzhen Chen; Clas Persson; Maria G. Ganchenkova; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; density functional theory; electronic structure; dielectric function; absorption coefficient; copper-based chalcogenides; ultra-thin film; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : To accelerate environmentally friendly thin film photovoltaic (PV) technologies, copper-based chalcogenides are attractive as absorber materials. Chalcopyrite copper indium gallium selenide (CIGS ≡ CuIn1–xGaxSe2) is today a commercially important PV material, and it is also in many aspects a very interesting material from a scientific point of view. LÄS MER