Sökning: "Per-olov Käll"
Visar resultat 1 - 5 av 8 avhandlingar innehållade orden Per-olov Käll.
1. A comparative study of the Y and Nd sialon systems : phase composition and some selected properties
Sammanfattning : .... LÄS MER
2. Quantum chemical studies of deposition and catalytic surface reactions
Sammanfattning : Quantum chemical calculations have been used to model chemical reactions in epitaxial growth of silicon carbide by chemical vapor deposition (CVD) processes and to study heterogeneous catalytic reactions for methanol synthesis. CVD is a common method to produce high-quality materials and e.g. LÄS MER
3. Theoretical Studies of Natural Gas Hydrates and H-bonded Clusters and Crystals
Sammanfattning : In this thesis H-bonded systems (natural gas hydrates, water clusters, and crystal ice) are studied by density functional theory (DFT) computations.Natural gas hydrates (NGHs) play an important role in energy and environmental fields: NGHs are considered as a promising backup energy resource in the near-future due to their tremendous carbon content; improper exploration of NGHs could induce geological disasters and aggravate the greenhouse effect. LÄS MER
4. Experimental and quantum-chemical studies of the surface interactions between organic molecules and nanocrystals of (a) RE2O3 (RE = Y or Gd); and (b) TiOb2
Sammanfattning : The increasing interest for using nanocrystals in bio-medical and optical applications has highlighted the need of molecular functionalisation of nanocrystals. Knowledge of how to attach molecules to the nanocrystal surface is a key factor. LÄS MER
5. New Materials for Gas Sensitive Field-Effect Device Studies
Sammanfattning : Gas sensor control is potentially one of the most important techniques of tomorrow for the environment. All over the world cars are preferred for transportation, and accordingly the number of cars increases, unfortunately, together with pollutants. Boilers and powerplants are other sources of pollutants to the environment. LÄS MER
