Sökning: "metal hydrides"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden metal hydrides.

  1. 1. Hydrogen Absorption in Metal Hydrides : Transmission of light in relation to hydrogen concentration and site occupancy of ultrathin vanadium films

    Kandidat-uppsats, Uppsala universitet/Tillämpad kärnfysik

    Författare :David Sörme; [2022]
    Nyckelord :metal hydrides; iron-vanadium superlattice; hydrogen; hydrogen site occupancy; hydrogen concentrationm; hydrogen storage;

    Sammanfattning : In this study the effect of hydrogenation on the optical properties in the wavelength range 400-1023 nm of an ultrathin iron-vanadium superlattice is investigated. Specifically, mea- surements of transmission are performed under different states of hydrogenation, along with measurements of absolute hydrogen concentration and hydrogen site occupancy. LÄS MER

  3. 2. Correlating Photoconductivity with Photochromism in Oxygen-containing Rare-earth Metal Hydride Thin Films

    Master-uppsats, Uppsala universitet/Materialfysik

    Författare :Suraya Kazi; [2021]
    Nyckelord :Rare-earth metal hydride; Thin film synthesis; Thin film characterization; Optical properties; Electrical properties; Chemical composition; Photochromic materials; Photoconductivity;

    Sammanfattning : Scientists have recently discovered simultaneous photoconductivity and photochromism (i.e., optical switching upon light exposure) of oxygen-containing rare-earth metal hydrides (REMHO). A deep understanding of these extraordinary optical and electrical properties can open the door to advanced technological uses such as smart windows. LÄS MER

  4. 3. Electric Transport of Rare-earth Metal Oxy-hydride Thin Films

    L3-uppsats, Uppsala universitet/Materialfysik; Uppsala universitet/Tillämpad kärnfysik

    Författare :Suraya Kazi; [2021]
    Nyckelord :Photochromism; Photoconductivity; Rare-earth Metal Oxy-hydride; Electric Transport; Photodarkening; Yttrium Oxy-hydride;

    Sammanfattning : In this project, I investigate the photoconductivenature of photochromic rare-earth metal oxy hydrides (REMHO). Such materials have received increasingscientific attention since they show a color-neutralphotochromic effect that can be applied, e.g., in smartwindows or chromogenic devices. LÄS MER

  5. 4. Photoconductivity in rare earth metal-oxy-hydrides

    Magister-uppsats, Uppsala universitet/Materialteori

    Författare :Félix Treuil-Dussouet; [2020]
    Nyckelord :Photoconductivity;

    Sammanfattning : In this project the evolution of resistivity under light exposition in materials like rare earth metal-oxy-hydrides is studied. These materials observe a decrease of the resistance when exposed under the light of a 19,5 W power lamp, and slowly tend to return to their initial resistance. LÄS MER

  7. 5. Vätgaslagring, -distribution och -rening

    Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

    Författare :Apoorv Gupta; [2017]
    Nyckelord :hydrogen; storage; distribution; cleaning; energy carrier;

    Sammanfattning : Rising greenhouse gas (GHG) emissions is a major cause of concern today. The primary source of energy all over the globe is fossil fuels, a non-renewable source of energy that is expected to get exhausted in the next 60-100 years. Damage to environment cannot be easily reversed but the initial steps are to reduce the damage done. LÄS MER