Sökning: "scanning tunneling spectroscopy"
Visar resultat 16 - 20 av 56 avhandlingar innehållade orden scanning tunneling spectroscopy.
16. Probing Atomic Scale Structure and Catalytic Properties of Cobalt Oxide Model Catalysts
Sammanfattning : Cobalt oxides are known to be active catalysts for a number of chemical reactions, but very little is known about the atomic scale processesresponsible for the activity. The research presented in this thesis is focused on obtaining an atomic scale understanding of the chemistry of wellcharacterizedcobalt oxide model catalyst surfaces consisting of pristine and defective CoO and Co3O4 thin films with the (111) and (100)terminations supported by Ag(100), Ir(100), and Au(111) single crystal surfaces. LÄS MER
17. Phthalocyanines on Surfaces : Monolayers, Films and Alkali Modified Structures
Sammanfattning : The Phthalocyanines (Pc’s) are a group of macro-cyclic molecules, widely investigated due to the possibility to use them in a variety of applications. Electronic and geometrical structure investigations of molecular model systems of Pc’s adsorbed on surfaces are important for a deeper understanding of the functionality of different Pc-based devices. LÄS MER
18. Oxidation of some Late Transition Metal Surfaces: Structural Studies from UHV to Atmospheric Pressure
Sammanfattning : The oxidation of Rh, Pd and Pt is studied under conditions ranging from ultra high vacuum to ambient pressures, with emphasis on a complete understanding of the geometry of the various oxide structures found. The investigations use a combination of various experimental methods, including high resolution core level spectroscopy, low energy electron diffraction, surface x-ray diffraction and scanning tunneling microscopy, as well as density functional theory calculations. LÄS MER
19. Scanning tunneling microscopy and photoemission studies of Ag films on metal/semiconductor surfaces
Sammanfattning : The research presented in this thesis has been focused on the study of thin Ag films, grown on metal-reconstructed Si(111) and Ge(111) surfaces.The films have been grown at room temperature, and the morphologiesand electronic structures of the films have been investigated using scanning tunneling microscopy and spectroscopy (STM/STS), low-energy electron diffraction (LEED) and angle-resolved photoelectron spectroscopy(ARPES). LÄS MER
20. Surface modification of III-V nanostructures studied by low-temperature scanning tunneling microscopy
Sammanfattning : In the past decade, driven by the demand for materials with high performance for next-generation semiconductor devices (e.g. LÄS MER
