Search for dissertations about: "chemical ordering"

Showing result 1 - 5 of 70 swedish dissertations containing the words chemical ordering.

  1. 1. Structure and chemical ordering in metallic nanoparticles from atomic scale modeling

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Magnus Rahm; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; nanoparticles; regular truncated octahedron; chemical ordering; nanoparticle shapes; molecular dynamics; icosahedron; Monte Carlo; modeling; Marks decahedron; nanoparticle structures;

    Abstract : In the last decades, a wide range of attractive properties have put metallic nanoparticles in the spotlight. These properties, often related to optical response and catalytic performance, are to a large extent dependent on structure and chemical ordering, that is, the distribution of elements in the nanoparticle. READ MORE

  2. 2. Magnetic ordering and crystal structure in selected transition- metal compounds

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Hui-Ping Liu; Uppsala universitet.; [1999]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; transition-metal compounds; magnetic ordering; crystal structure; magneticstructure; neutron diffraction; Kemi; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi; Inorganic Chemistry; oorganisk kemi;

    Abstract : Applications of magnetic materials are inherently related to their crystal, magnetic and electronic structures. In this thesis, experimental and theoretical methods have been focused on magnetic bulk materials from novel chemical synthesis, to X-ray diffraction for initial phase characterisation, and crystal and magnetic structure studies to explain their complex magnetic properties. READ MORE

  3. 3. Modelling Chemical Reactions Theoretical Investigations of Organic Rearrangement Reactions

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Per-Erik Larsson; Uppsala universitet.; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum chemistry; Kvantkemi; NATURAL SCIENCES Chemistry Theoretical chemistry Quantum chemistry; NATURVETENSKAP Kemi Teoretisk kemi Kvantkemi; Quantum Chemistry; Kvantkemi;

    Abstract : Chemical reactions are ubiquitous and very important for life and many other processes taking place on earth. In both theoretical and experimental studies of reactivity a transition state is often used to rationalise the outcome of such studies. READ MORE

  4. 4. Retinoids and Ruthenium Complexes: Spectroscopic Probes for Lipid Membranes

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Frida Svensson; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; retinoic acid; lipid vesicle; liposomes; dipyridophenazine; orientation; linear dichroism; membrane interaction; ruthenium; lipid chain ordering;

    Abstract : .... READ MORE

  5. 5. Cooperative Lithium-Ion Insertion Mechanisms in Cathode Materials for Battery Applications

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Helen Björk; Uppsala universitet.; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Li-ion battery; cathode materials; single-crystal; X-ray diffraction; delithiation; superlattice; phase transformation; charge-ordering; Kemi; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi; Inorganic Chemistry; oorganisk kemi;

    Abstract : Understanding lithium-ion insertion/extraction mechanisms in battery electrode materials is of crucial importance in developing new materials with better cycling performance. In this thesis, these mechanisms are probed for two different potential cathode materials by a combination of electrochemical and single-crystal X-ray diffraction studies. READ MORE