Sökning: "Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik"
Visar resultat 1 - 5 av 65 avhandlingar innehållade orden Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik.
1. Effect of Substrate on Bottom-Up Fabrication and Electronic Properties of Graphene Nanoribbons
Detta är en avhandling från Uppsala : Acta Universitatis UpsaliensisSammanfattning : Taking into account the technological demand for the controlled preparation of atomically precise graphene nanoribbons (GNRs) with well-defined properties, the present thesis is focused on the investigation of the role of the underlying metal substrate in the process of building GNRs using bottom-up strategy and on the changes in the electronic structure of GNRs induced by the GNR-metal interaction. The combination of surface sensitive synchrotron-radiation-based spectroscopic techniques and scanning tunneling microscopy with in situ sample preparation allowed to trace evolution of the structural and electronic properties of the investigated systems. LÄS MER
2. Synchrotron Radiation Studies of Molecular Building Blocks for Functional Materials
Detta är en avhandling från Uppsala : Acta Universitatis UpsaliensisSammanfattning : The research on new materials is a primary driving force for progress in human society. One of the most significant research topic nowadays is the development of new functional materials for technological applications, like perovskite implemented in solar cells, and graphene as a representative for the new 2D materials family. LÄS MER
3. Constructing and Commissioning HELIOS – A High Harmonic Generation Source for Pump-Probe Measurements with sub 50 fs Temporal Resolution The Development of Experimental Equipment for Extreme Ultraviolet Spectroscopy
Detta är en avhandling från Uppsala : Acta Universitatis UpsaliensisSammanfattning : This thesis presents HELIOS, an in-house laboratory for time-resolved pump-probe spectroscopy with extreme-ultraviolet (XUV) probe radiation. A wide span of pump wavelengths can be generated using commercial laser equipment while XUV probe radiation is generated via a high harmonic generation process in a noble gas delivering probe photons with energies between 20 eV and 72 eV. LÄS MER
4. Atomic Scale Design of Clean Energy Materials Efficient Solar Energy Conversion and Gas Sensing
Detta är en avhandling från Uppsala : Acta Universitatis UpsaliensisSammanfattning : The focus of this doctoral thesis is the atomic level design of photocatalysts and gas sensing materials. The band gap narrowing in the metal oxides for the visible-light driven photocatalyst as well as the interaction of water and gas molecules on the reactive surfaces of metal oxides and the electronic structure of kaolinite has been studied by the state-of-art calculations. LÄS MER
5. The Electronic Structure of Organic Molecular Materials Theoretical and Spectroscopic Investigations
Detta är en avhandling från Uppsala : Uppsala University, Department of Physics and AstronomySammanfattning : In the present thesis the electronic properties of two organic molecules were studied by means of density functional theory (DFT) in connection to their possible applications in organic photovoltaics and molecular spintronics respectively.The first analysed system is the C60 derivative PCBM extensively used in polymer solar cells for the charge separation process. LÄS MER
