Global ETD Search
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 adsorption"”.
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Chemistry directed assembly of multilayered polymer thin films and colloidal particles
… the polymer and the surface. This concept of adsorption directed by surface chemistry is universal, in that the same sets of rules derived for polymeric systems can also be applied to molecule and meso-scale systems, including dye molecules, colloidal particles, proteins and cells. An approach …
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Nanoscale surface modification of wood veneers for adhesion
… attachment of amine containing water soluble polyelectrolytes provides a path to create functional surfaces in a controlled manner. Furthermore, modification of the surface can be performed using layer-by-layer (LbL) assembly, where the adsorption of polyelectrolytes or nanoparticles in …
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Engineering the microfabrication of layer-by-layer polyelectrolyte assembly
The feasibility of microstructuring polyelectrolyte multilayers has been established by using the layer-by-layer assembly technique in combination with patterned self-assembled monolayers (SAMs). SAMs of a carboxylic acid surface (COOH) and a triethylene glycol surface (EG) were used to promote and …
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Novel techniques for microencapsulation of probiotic bacteria
… of ammonium shellac doped with a pH-sensitive polyelectrolyte. We also demonstrate that yeast cells retain their viability even when treated with aqueous solutions of low pH. In addition, the pH-triggered release of yeast cells from these composite microcapsules and their disintegration rates …
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Characterization of Cellulose and Chitin Thin Films and Their Interactions with Bio-based Polymers
… via substrate exposure to cellulase. Cellulase adsorption onto RC films was independent of d, whereas cellulase adsorption onto SNC and DNC films increased with d. Enhanced access to guest molecules for SNC and DNC films relative to RC films revealed they are more porous. The porosity of these …
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Ordered photonic microstructures
… fragile ordered assemblies is presented in which polyelectrolyte multilayers serve as adsorption platforms that anchor the colloidal assemblies. Tailorability of the polyelectrolyte surface properties (charge density, morphology) enables tuning of the colloid adsorption behavior. The …
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Nanocomposite-based Lignocellulosic Fibers
… were successfully fabricated by sequential adsorption of oppositely charged poly(diallydimethylammonium) chloride (PDDA) and clay nanoparticles in a number of repeated deposition cycles. Nanocomposite fibers displayed layered structure as indicated by the electrokinetic potential studies and …
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Organic Self-Assembled Films for Nonlinear Optics: Film Structure, Composition and Kinetics of Film Formation
… found to reduce the time required for complete adsorption of the polyion. This can have a significant impact on fabrication of films with high bilayer numbers. A variation of the above technique, which involves adsorbing one of the constituents electrostatically and another covalently, was …