Search for dissertations about: "polar surfaces"

Showing result 6 - 10 of 55 swedish dissertations containing the words polar surfaces.

2. 6. Chemistry and Physics of Cu and H2O on ZnO Surfaces : Electron Transfer, Surface Triangles, and Theory

   Author : Matti Hellström; Kersti Hermansson; Peter Broqvist; Daniel Spångbeg; Jörg Behler; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; catalysis; density functional theory; SCC-DFTB; band-filling correction;

   Abstract : This thesis discusses the chemistry and physics of Cu and H2O on ZnO surfaces, based primarily on results from quantum chemical calculations. The underlying context is heterogeneous catalysis, where Cu/ZnO-mixtures are used in the industrial synthesis of methanol and in the water gas shift reaction. READ MORE

4. 7. Atom-Diatom Scattering. From Potential Energy Surfaces to Rate Constants

   Author : Erik Abrahamsson; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : This thesis is about the theoretical study of collisions between atoms and diatomic molecules. It might seem like a trivial problem, but in reality it is a highly complex process. Despite, or because of, their apparent simplicity, these processes are of importance for a broad area of science. READ MORE

5. 8. Adsorption of molecular thin films on metal and metal oxide surfaces

   Author : Zahra Besharat; Mats Göthelid; Mark Rutland; Magnus Johnson; W. Gregory Sawyer; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Self assembled monolayer SAM ; dye synthesis solar cell DSSC ; thiol; selenol; Cu2O 100 ; Cu2O 111 and dehydrogenation; Fysik; Physics; Teknisk materialvetenskap; Materials Science and Engineering;

   Abstract : Metal and metal oxides are widely used in industry, and to optimize their performance their surfaces are commonly functionalized by the formation of thin films. Self-assembled monolayers (SAMs) are deposited on metals or metal oxides either from solution or by gas deposition. READ MORE

6. 9. Design of pyrimidine-based photoresponsive surfaces and light induced wettability control

   Author : Anuttam Patra; []
   Keywords : ;

   Abstract : For photochromic molecules, the ability to switch reversibly between two states is controlled largely by structural effects. The photodimerization of 5-methyluracil, commonly known as thymine, a member of the pyrimidine family and one of the DNA bases, is a particularly important reaction in photobiology, one which occurs when the molecule is subjected to UV irradiation. READ MORE

7. 10. Nanostructured surfaces created by the interactions of dendrimers and oppositely charged amphiphiles

   Author : Marianna Yanez; Fysikalisk kemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; PAMAM; Surfactant; SDS; Lipid; Bilayer; Model Biomembrane; Nucleolipid; DLPA; DLPU; DNA; RNA; Neutron Reflectometry; Poly amidoamine ; Interface; Adsorption; Polyelectrolyte;

   Abstract : The research described in this thesis aims to understand the interactions between cationic poly(amidoamine) (PAMAM) dendrimers and small oppositely charged amphiphiles at the solid-liquid and air-liquid interfaces in relation to the bulk solution behavior. There is high interest in PAMAM dendrimers because they are well-defined polymers with a hierarchical architecture which makes them promising materials as nanocapsules and gene vectors. READ MORE