Sökning: "surface film"

Visar resultat 1 - 5 av 487 avhandlingar innehållade orden surface film.

  1. 1. Corrosion and Surface Studies of Stainless Steel and Chromium Carbide Thin-Films

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Jonas Högström; Uppsala universitet.; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; corrosion; electrochemistry; thin film; stainless steel; passive film; chromium carbide; carbon oxidation; surface; depth profile; XPS; SEM; EQCM; sputtering;

    Sammanfattning : Although the passive films that form on stainless steels have been extensively studied, the concentration depth profiles are not fully understood. Their thinness makes passive films hard to study, but angle-resolved X-ray photoelectron spectroscopy (ARXPS) is a non-destructive technique that can be used to obtain depth information. LÄS MER

  2. 2. Bioaccessibility of Stainless Steels Importance of Bulk and Surface Features

    Detta är en avhandling från Stockholm : KTH

    Författare :Gunilla Herting; KTH.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Stainless steel; iron; chromium; nickel; corrosion; metal release; artificial rain; synthetic body fluids; acetic acid; surface oxide; surface finish; NATURAL SCIENCES Chemistry Physical chemistry Surface and colloid chemistry; NATURVETENSKAP Kemi Fysikalisk kemi Yt- och kolloidkemi;

    Sammanfattning : With increasing environmental awareness, the desire to protect human beings and the environment from adverse effects induced by dispersed metals has become an issue of great concern and interest. New policies, such as REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) within the European Community, have been implemented to reduce hazards posed by the use of chemicals on producers and downstream users. LÄS MER

  3. 3. Polymer-coated paper and board - Role of substrate, polymer characteristics and additives

    Detta är en avhandling från Stockholm : KTH

    Författare :Thomas Schuman; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; surface energy; latex; surface roughness; corona; contact angle; barrier properties; liquid sorption; surface treatment; calendering; poly vinyl alcohol ; coating;

    Sammanfattning : The surface roughness of paper or board has a significant influence on the homogeneity of an applied polymer film, and this thesis discusses how it may be improved by a surface treatment, e.g. high-temperature calendering or precoating. LÄS MER

  4. 4. Phthalocyanines on Surfaces Monolayers, Films and Alkali Modified Structures

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Katharina Nilson; Uppsala universitet.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atomic and molecular physics; Phthalocyanines; Surface Science; X-ray Photoelectron Spectroscopy XPS ; X-ray Absorption Spectroscopy XAS ; Scanning Tunneling Microscopy STM ; Density Functional Theory DFT ; Metal-free Phthalocyanine; Iron Phthalocyanine; Zinc Phthalocyanine; Gold; Graphite; Aluminium; Indium Antimony; Molecular adsorption; Monolayer; Film; Alkali; Geometrical structure; Electronic structure; Doping; Atom- och molekylfysik; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    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

  5. 5. Modification of polymeric particles via surface grafting for 3D scaffold design

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Robertus Wahyu Nayan Nugroho; KTH.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; surface grafting; PLA; PLLA; hydrophilic polymers; particles; geometry; steric stabilization; atomic force microscopy AFM ; polyelectrolyte multilayers; 3D scaffold; bone tissue engineering; surface degradation;

    Sammanfattning : Surface modification techniques have played important roles in various aspects of modern technology. They have been employed to improve substrates by altering surface physicochemical properties. LÄS MER