Sökning: "size-dependence"

Visar resultat 21 - 25 av 30 avhandlingar innehållade ordet size-dependence.

  1. 21. Atomistic studies of nano-structural mechanical behavior and point defects

    Författare :Pär Olsson; Mekanik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The content of this thesis consists of two parts. For the first part, size and crystallographic orientational influence on the elastic properties of bcc nanowires and films have been studied through static molecular simulations. In order to explicitly account for surface effects, the concept of surface free energy has been employed. LÄS MER

  3. 22. Redox Chemistry in Radiation Induced Dissolution of Spent Nuclear Fuel : from Elementary Reactions to Predictive Modeling

    Författare :Olivia Roth; Mats Jonsson; David W. Shoesmith; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear chemistry; Kärnkemi;

    Sammanfattning : The focus of this doctoral thesis is the redox chemistry involved in radiation induced oxidative dissolution of spent nuclear fuel and UO2 (as a model substance for spent nuclear fuel). It is shown that two electron oxidants are more efficient than one electron oxidants in oxidative dissolution of UO2 at low oxidant concentrations. LÄS MER

  4. 23. On the Role of Interfaces in Small Scale Plasticity

    Författare :Carl F. O. Dahlberg; Jonas Faleskog; Lars Pilgaard-Mikkelsen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The strong evidence for a size dependence of plastic deformation in polycrystalline metalsis the basis for the research presented in this thesis. The most important parameter for this, and arguably also the most well known, is the grain size. As the size of the grains in a microstructure is decreased the yield stress increases. LÄS MER

  5. 24. Development and application of ultra-sensitive fluorescence spectroscopy and microscopy for biomolecular interaction studies

    Författare :Lei Xu; Jerker Widengren; Gerhard Schütz; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; single molecule spectroscopy; fluorescence correlation spectroscopy; stimulated emission microscopy; cancer; biomolecular interaction; co-localization; Biological Physics; Biologisk fysik;

    Sammanfattning : This thesis describes the development of sensitive and high-resolution fluorescence spectroscopic and microscopic techniques and their application to probe biomolecules and their interactions in solution, lipid membrane model systems and in cells. Paper I-IV are largely focused on methodological developments. LÄS MER

  7. 25. Physical and Chemical Aspects of Radiation Induced Oxidative Dissolution of UO2

    Författare :Olivia Roth; Mats Jonsson; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; UO2; spent nuclear fuel; dissolution; oxidation; radiolysis; irradiation; particle size; modeling; Chemistry; Kemi;

    Sammanfattning : Denna licensiatavhandling behandlar oxidativ upplösning av UO2. Upplösning av UO2 studeras huvudsakligen då UO2-matrisen hos använt kärnbränsle förväntas fungera som en barriär mot frigörande av radionuklider i ett framtida djupförvar. LÄS MER