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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"polyelectrolyte brush"”.
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Direct Measurements of Polyelectrolyte Brush Responses using Atomic Force and Optical Microscopy
In this thesis, so-called ”polyelectrolyte brushes” are addressed. The focus is on the investigation and understanding of the response properties of these polymer surfaces. For that purpose new methods are developed which combine force spectroscopy and optical microscopy. As well, established …
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Molecular mechanics of cartilage : quantification of GAG electrostatic interactions via high-resolution force spectroscopy
… to a planar surface to form model biomimetic polyelectrolyte "brush" layers whose environment was varied to mimic physiological conditions. The total intersurface force (<[or equal to] nN) between the CS-GAG brushes and chemically modified probe tips (SO₃⁻ and OH) was measured as a function of …
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Molecular dynamics simulations of polyelectrolyte brushes
This thesis studies strong, completely charged polyelectrolyte brushes. Extensive molecular dynamics simulations are performed on different polyelectrolyte brush systems using local compute servers and massively parallel supercomputers. The full Coulomb interaction of charged monomers, counterions, …
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New Approaches to the Synthesis of Porous and/or High Surface Area Transition Metal Oxides
… titania colloids over anionic spherical polyelectrolyte brush particles under aqueous conditions. Stepwise calcinations first under argon followed with a second calcination in air lead to the complete removal of polymer template without collapse and hollow porous spheres with crystalline …
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Counterion Distribution around a Macroion in Polyelectrolytes Probed by Anomalous Small-Angle X-ray Scattering
A systematic and comprehensive study of polyelectrolytes in solution has been carried out using Anomalous Small Angle X-ray Scattering (ASAXS) in order to probe the counterion correlation around the macroion. In the course of this study, different polyelectrolyte systems such as, rod-like …
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Weak polyacid brushes : synthesis, swelling behavior, complex formation and micropatterning
… polymer monolayers, so-called "polymer brushes", were covalently attached to solid planar surfaces and investigated with respect to their properties in contact with aqueous solutions of varying composition. <br> <br>The synthesis of these polymer brushes was performed in two steps. …
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The Surface Charge of Soft and Hard Sphere Colloidal Particles - Experimental Investigation and Comparison to Theory
… we measured the interaction force of two planar polyelectrolyte brush layers across an aqueous medium containing trivalent counterions with the surface forces apparatus. We found that steric repulsion does not occur. The repulsion only arises from residual charges inside the brush layers. From …
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Application and Development of Mechanoresponsive Polymer Structures
Mechanoresponsive Systeme antworten auf mechanische Reize mit einer Eigenschaftsänderung. Diese Dissertation umfasst die Arbeiten mit zwei mechanoresponsiven Systemen, die optisch auf mechanische Reize antworten. Sie basieren auf polymeren Strukturen, einer Polymerbürste und einem Hydrogelnetzwerk. …