Sökning: "Yt- och kolloidkemi"

Visar resultat 1 - 5 av 31 avhandlingar innehållade orden Yt- och kolloidkemi.

1. 1. Biomimetic Membranes: : Molecular Structure and Stability Studies by Vibrational Sum Frequency Spectroscopy

   Författare :Jonathan F.D. Liljeblad; Mark W. Rutland; Magnus C. Johnson; Tore Brinck; Lars Kloo; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Vibrational Sum Frequency Spectroscopy VSFS ; Langmuir monolayer; LB depositon; phospholipids; oxidation; biomimetic membranes; Surface and colloid chemistry; Yt- och kolloidkemi;

   Sammanfattning : In the research presented in this licentiate thesis the surface specific technique Vibrational Sum Frequency Spectroscopy, VSFS, combined with the Langmuir trough has been utilized to investigate Langmuir monolayers and Langmuir-Blodgett (LB) deposited mono- and bilayers of phospholipids. Their molecular structure, stability, and hydration were probed to gain additional understanding of important properties aiming at facilitating the use of such layers as model systems for biological membranes. LÄS MER

3. 2. Adsorption of biopolymers and their layer-by-layer assemblies on hydrophilic surfaces

   Författare :Maria Lundin; Eva Blomberg; Thomas Arnebrant; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Layer-by-layer; multilayer; adsorption; biopolymers; Chitosan; Heparin; Mucin; Albumin; Lysozyme; β-casein; SDS; QCM-D; Ellipsometri; DPI; TIRF; FRET; SFA; layer structure; solvent content; vertical diffusion; exponential growth; solid-liquid interface; deposition conditions; Surface and colloid chemistry; Yt- och kolloidkemi;

   Sammanfattning : It is widely known that surfaces play an important role in numerous biological processes and technological applications. Thus, being able to modify surface properties provides an opportunity to control many phenomena occurring at interfaces. LÄS MER

4. 3. Interfacial Properties of Biomacromolecular Model Systems: Surface Forces and Nanotribology

   Författare :Niklas Nordgren; Mark Rutland; Harry Brumer III; Robert Pelton; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; afm; surface force; friction; composite material; model surface; quartz crystal microbalance; dissipation; cellulose; xyloglucan; chitosan; colloidal probe; nanotribology; biomimetic; enzymatic; polysaccharide; graft; fiber; thiol; spring constant; calibration; lubrication; polyion; responsive.; Surface and colloid chemistry; Yt- och kolloidkemi;

   Sammanfattning : The nanotribology, adhesion and related interfacial properties of biomacromolecular systems have been studied.  The aim was to elucidate the role of physisorbed and chemically grafted bio-polymers implicated as mediators for cellulose based processing and material design. LÄS MER

5. 4. 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. 5. Structures of Polyelectrolyte Multilayers and Preasorbed Mucin : The Influence of Counterions

   Författare :Zsombor Feldötö; Eva Blomberg; Regine von Klitzing; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Surface and colloid chemistry; Yt- och kolloidkemi;

   Sammanfattning : The focus in this thesis has been to gain a fundamental understanding of how different type of salts affect preadsorbed polyelectrolytes, both natural and synthetic. The knowledge from the fundamental work is then applied on a commercial system to investigate if the efficiency can be enhanced. LÄS MER