Sökning: "Surface and colloid chemistry"

Visar resultat 11 - 15 av 45 avhandlingar innehållade orden Surface and colloid chemistry.

1. 11. Multilayer Structures for Biomaterial Applications : Biomacromolecule-based Coatings

   Författare :Tobias Halthur; Per M. Claesson; Bjørn Stokke; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; multilayer; layer-by-layer deposition; physical chemistry; surface chemistry; adsorption; ellipsometry; QCM-D; DPI; protein adsorption; polypeptides; biomaterials; biosurfaces; amelogenin; solid liquid interface; Surface and colloid chemistry; Yt- och kolloidkemi;

   Sammanfattning : The cellular response to a biomaterial, such as a dental implant, is mainly governed by the surface properties, and can thus be altered by the introduction of a surface coating. In this thesis the buildup of a biomacromolecule-based coating formed by layerby-layer (LbL) deposition of the charged polypeptides poly(L-lysine) (PLL) and poly(L-glutamic acid) (PGA) has been studied. LÄS MER

3. 12. Lubrication and Surface Properties of Adsorbed Layers of Polyelectrolytes and Proteins

   Författare :Torbjörn Pettersson; Per M. Claesson; Hans-Jürgen Butt; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biochemistry; biomedical engineering; Surface and colloid chemistry; Yt- och kolloidkemi;

   Sammanfattning : Friction forces between protein / polyelectrolyte layers, adsorption properties of proteins, and conformational changes due to variation in electrolyte concentration have been investigated. The aim was to obtain better understanding of adsorbed layer properties, with focus on the relation between layer structure and lubrication capabilities. LÄS MER

4. 13. Vibrational Sum Frequency Spectroscopy Studies at the Air-Liquid Interface

   Författare :Eric Tyrode; Mark Rutland; Paul Davies; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sum Frequency Generation; SFG; VSFS; surfactant; adsorption; water; surface structure; hydration; surface tension; fluorosurfactants; liquid-air interface; poly ethylene oxide surfactants; surface molecular orientation; acetic acid.; Surface and colloid chemistry; Yt- och kolloidkemi;

   Sammanfattning : In this thesis the structure and hydration of small organic and amphipilic compounds adsorbed at the air-liquid interface, have been studied using the nonlinear optical technique Vibrational Sum Frequency Spectroscopy (VSFS). The second order nature of the sum frequency process makes this technique particularly surface sensitive and very suitable for interfacial studies, as molecules at the surface can be distinguished even in the presence of a vast excess of the same molecules in the bulk. LÄS MER

5. 14. Polyelectrolyte complexes of bottle brush copolymers : Solution and adsorption properties

   Författare :Shovsky Alexander; Per M. Claesson; Tommy Nylander; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Surface and colloid chemistry; Yt- och kolloidkemi;

   Sammanfattning : The aim of this thesis work was to systematically investigate the physico-chemical properties of polyelectrolyte complexes (PECs) formed by bottle brush and linear polyelectrolytes in solution and at solid / liquid interfaces. Electrostatic self-assembly of oppositely charged macromolecules in aqueous solution is a versatile strategy to construction of functional nanostructures with easily controlled properties. LÄS MER

7. 15. The bentonite barrier : microstructural aspects on colloid filtration and radiation effects on bentonite colloid stability

   Författare :Michael Holmboe; Mats Jonsson; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Chemistry;

   Sammanfattning : In many countries a multi-barrier concept in a deep geological repository is planned for final disposal of nuclear waste. Many of these different concepts, for example the Swedish KBS-3 model, include an engineered barrier consisting of compacted bentonite. LÄS MER