Search for dissertations about: "polar surfaces"

Showing result 1 - 5 of 41 swedish dissertations containing the words polar surfaces.

  1. 1. Biomimetic surfaces : Preparation, characterization and application

    University dissertation from Institutionen för fysik, kemi och biologi

    Author : Annika Borgh; Linköpings universitet.; Linköpings universitet.; [2007]
    Keywords : Natural Sciences Physical Sciences Atom and Molecular Physics and Optics; Naturvetenskap Fysik Atom- och molekylfysik och optik; Self-assembled monolayers; biomimetic surfaces; phosphates; antifreeze; surface spectroscopy; NATURAL SCIENCES Physics Atomic and molecular physics Molecular physics; NATURVETENSKAP Fysik Atom- och molekylfysik Molekylfysik;

    Abstract : I denna avhandling beskrivs tillverkning, karaktärisering och tillämpning av ett antal biomimetiska ytor. Biomimetik är att härma naturen och grundtanken är att titta på hur naturen löst liknande problemställningar. READ MORE

  2. 2. Surfactants at non-polar surfaces

    University dissertation from Stockholm : Kemi

    Author : Marcus Persson; ; KTH.; [2002]
    Keywords : nonionic surfactants; SDS; surface tension; wetting; surface force; disjoining pressure isotherm; adhesion;

    Abstract : The aim of this thesis work was to investigate theadsorption of surfactants to different nonpolar interfaces.Particularly, the effects of the polar group and the nature ofthe hydrophobic interface were elucidated. The interfacialbehavior of the liquid-vapor interface was investigated bymeans of surface tension measurements. READ MORE

  3. 3. Metastable Alumina from Theory: Bulk, Surface, and Growth of κ-Al2O3

    University dissertation from Chalmers University of Technology

    Author : Carlo Ruberto; Chalmers tekniska högskola.; Chalmers University of Technology.; [2001]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics; density-functional theory; DFT; plane waves; pseudopotentials; first principles; ceramic materials; ionic crystals; cutting tools; stability; structure; Pauling s rules; Tasker s rules; surface states; one-dimensional electron gas; TiC; adsorption; bonding; polar surfaces;

    Abstract : Aluminas are materials of high technological importance that show a fascinating structural flexibility, with a large amount of different phases (alpha, gamma, eta, delta, kappa, chi, ...) and phase transitions at relatively high temperatures. READ MORE

  4. 4. Polar molecules in crystalline and surface environments : From first principles

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Maria Alfredsson; Uppsala universitet.; [1999]
    Keywords : Natural Sciences Chemical Sciences; Naturvetenskap Kemi; Chemistry; Kemi; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi; Inorganic Chemistry; oorganisk kemi;

    Abstract : With the knowledge of the composition and structure of a chemical system, be it a molecule, a two-dimensional surface or a three-dimensional crystal, it is now possible to predict the specific properties of the compound under consideration via computational studies. Molecular and periodic Hartree-Fock and DFT calculations have been used as a tool to study polar molecules and how their properties respond to the molecular environment in a crystal or on an ionic surface. READ MORE

  5. 5. Interactions between non-polar surfaces in water: Fokus on talc, pitch and surface roughness effects

    University dissertation from Stockholm : KTH

    Author : Viveca Wallqvist; KTH.; [2009]
    Keywords : Natural Sciences Chemical Sciences Physical Chemistry; Naturvetenskap Kemi Fysikalisk kemi; Natural Sciences Chemical Sciences Physical Chemistry; Naturvetenskap Kemi Fysikalisk kemi; Natural Sciences Chemical Sciences; Naturvetenskap Kemi; Talc; surface forces; capillary attraction; hydrophobic interaction; pitch control; wetting agent; dispersing agent; adsorption; imbibition; absorption; permeation; atomic force microscopy; colloidal probe; Hamaker constant; surface roughness; nanostructure.; Talk; kapillärattraktion; ytkrafter; hydrofob växelverkan; hartskontroll; vätningsmedel; dispergeringsmedel; adsorption; uppsugning; absorption; permeabilitet; atomkraftsmikroskopi; kolloidal partikel; Hamakerkonstant; ytråhet; nanostrukturerad yta.; NATURAL SCIENCES Chemistry Physical chemistry Surface and colloid chemistry; NATURVETENSKAP Kemi Fysikalisk kemi Yt- och kolloidkemi; NATURAL SCIENCES Chemistry Physical chemistry; NATURVETENSKAP Kemi Fysikalisk kemi; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi;

    Abstract : The aim of this thesis work was to gain understanding of the interactions between talc mineral and surfaces, liquids and chemicals relevant for industrial applications, such as pulp and paper. Talc is used in the pulp and paper industry as a filler pigment, in control of pitch (lipophilic extractives) deposits and as a coating pigment. READ MORE