Sökning: "surface molecular orientation"
Visar resultat 1 - 5 av 72 avhandlingar innehållade orden surface molecular orientation.
1. Electronic and Molecular Surface Structures of Dye-Sensitized TiO2 Interfaces
Sammanfattning : The dye-sensitized solar cell is a promising solar cell technology. In these systems the key process for light to electricity conversion is molecular in nature and is initiated in dye molecules adsorbed at a semiconducting surface. LÄS MER
2. Vibrational Sum Frequency Spectroscopy Studies at the Air-Liquid Interface
Sammanfattning : In this thesis the structure and hydration of small organic and amphipilic compounds adsorbed at the air-liquid interface, have been studied using the nonlinear optical technique Vibrational Sum Frequency Spectroscopy (VSFS). The second order nature of the sum frequency process makes this technique particularly surface sensitive and very suitable for interfacial studies, as molecules at the surface can be distinguished even in the presence of a vast excess of the same molecules in the bulk. LÄS MER
3. Beyond Köhler theory : Molecular dynamics simulations as a tool for atmospheric science
Sammanfattning : In this thesis, the results from molecular dynamics (MD) simulations of nanoaerosol clusters are discussed. The connecting link of these studies is the Köhler theory, which is the theory of condensational growth and activation of cloud droplets to form clouds. LÄS MER
4. Surface Studies of Model Systems relevant for Pd and Ag Catalysts
Sammanfattning : This PhD thesis reports on investigations of the atomic scale structure of model catalysts relevant for the catalytic oxidation of CO and methane over Pd, and NOx reduction over silver-alumina, important reactions in automotive catalysts. By using complementary experimental techniques such as X-ray Photoelectron Spectroscopy, High Pressure X-ray Photoelectron Spectroscopy, Surface X-ray Diffraction, Low Energy Electron Diffraction, Infrared Spectroscopy, and Scanning Tunneling Microscopy, combined with theoretical calculations, the work presented in this thesis aims at an atomistic characterization of the active sites for silver-alumina and Pd model catalysts which may help to the design of new and improved catalysts. LÄS MER
5. Surface Plasmon Resonance for the Detection of Coagulation and Protein Interactions
Sammanfattning : Medical improvements rely on methodological inventions and developments and on the steadily increasing knowledge of human physiology. This thesis presents methodological developments enabling the study of body fluid interactions with a material surface under more realistic and physiologically relevant conditions than previously possible. LÄS MER
