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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 20 of 44 for “"Polymer Brush"”.
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Synthesis and Characterization of Siloles, Silole-Containing Polymers and Photoswitchable Polymer Brush
… of silole-based small molecules and conjugated polymers. Silole, a silicon analogue of cyclopentadiene is a very interesting molecule due to its unique photo-physical and electronics properties, and a potential candidate for electroluminescent and photo-luminescent based applications. Although …
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Synthese und Charakterisierung von Polymerbürsten-Oberflächen mit Gradienten und Strukturierung (Synthesis and characterization of patterned and gradient polymer brush surfaces)
… of general methods of preparation of tethered polymer layers with laterally changing properties and investigation of their properties with focus on controlled adsorption and liquid flow. The temperature dependent character of the grafting reaction is used for the design of mono- and bicomponent …
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Design and Characterization of Central Functionalized Asymmetric tri-Block Copolymer Modified Surfaces
… central functionalized asymmetric tri-block copolymers (CFABC) were designed as a new type of polymer brush surface modifier, with a short central functionalized block that can form chemical bonds with a suitable substrate surface. A combination of sequential living anionic polymerization and …
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DEVELOPMENT AND OPTMIZATION OF POLYELECTROLYTE POLYMER BRUSHES FOR THE FRACTIONATION OF PEPTIDE AND PROTEIN MIXTURES PRIOR TO MALDI MASS SPECTROMETRY ANALYSIS
… is the synthesis, development and application of polymer brushes for the fractionation of complex mixtures of peptides and digested proteins prior to MALDI-MS analysis. Even though MALDI-MS analysis is increasingly used in proteomic applications, this method of analysis suffers loss of performance …
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Doubling of block copolymer line patterns by electron-beam-fabricated templates
The doubling of block copolymer (BCP) line patterns by electron-beam-fabricated template patterns is presented. Difficulties in achieving low defect self-assembly within the narrow line patterns are discussed. To address these issues, experimental approaches were investigated of narrowing the …
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Characterization of Spin Coated Polymers in Nano-environments as a Function of Film Thickness
Polymer applications have become more demanding as industry continuously turns to more microscopic parts. Due to the interactions of the polymer chains with the supporting surface and the air interface, the thinner films required for such applications have distinctly different properties than those …
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Polymer Dispersity Affects Conformation of Brushes Grafted on Nanoparticles
Polymer-grafted nanoparticles (PGNPs) exhibit prominent performance in applications, such as tough thin films,1-3 optics and electrics,4-7 ultrafiltration membranes,8 biomolecular and drug delivery vehicles,9-12 colorimetric sensors,13-15 and lubrication,16-18 partly due to uniform dispersion …
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Prediction of Microstructural and Conformational Evolutions through Application of Steepest-Entropy-Ascent Quantum Thermodynamics
… for capillary dynamics, protein folding, polymer brush conformal evolution, and ion sequestration using polymers. The results from each model are compared against experimental results for the thermodynamic paths of systems under varying system conditions are shown. Use of the combined …
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Nanoscale Hydrogel Films and Polymer Brushes Grafted Onto Nanocapillary Array Membranes for Externally Controllable Size -Selective Molecular Transport
… NCAMs. Molecular transport through the PNIPAAm polymer brush-modified NCAMs was investigated by real-time fluorescence measurements using fluorescein isothiocyanate (FITC) labeled dextrans.
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Polymers as directing agents for motions of chemical and biological species
… of solid surface modifications with various polymeric materials which were used as a guiding agent for motion of chemical and biological species. Quasi-two dimensional poly(oligoethylene glycol) acrylate polymer brush based molecular conduits have been designed with the goal of regulating and …
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Development of Amine Containing Polymer Modified MALDI Targets for Complex Peptide and Protein Mixture Fractionation Prior to MALDI Mass Spectrometry Analysis
… TITLE: DEVELOPMENT OF AMINE CONTAINING POLYMERIC MODIFIED MALDI TARGET SUBSTRATES FOR COMPLEX MIXTURE FRACTIONATION OF PEPTIDE AND PROTEIN MIXTURES PRIOR TO MALDI MASS SPECTROMETRY ANALYSIS MAJOR PROFESSOR: Dr. Gary Kinsel The focus of this dissertation is the synthesis, development and …
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Novel Inorganic Photoresists for Three-Dimensional Microfabrication
… is based on silica microspheres with various polymer brush coatings that impart interesting solubility changes. These changes drive assembly processes or impart resistance to development, allowing for 2D and 3D fabrication of unique structures. The second system consist of custom organosilicon …
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Synthesis of pH-responsive core-shell nanoparticles of different sizes and with different shell compositions
… Poly(ethylene glycol) methacrylate copolymer nanoparticles were sterically stabilized by the amphiphilic polymer brush at the particle surface and exhibited slightly smaller hydrodynamic diameter measured by dynamic light scattering. Manipulation of the reaction kinetics and the …
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Thin-Film Polymer Nanocomposites Composed of Two-Dimensional Plasmonic Nanoparticles and Graphene
Plasmonic polymer nanocomposites contain plasmonic nanoparticles that are dispersed within a polymer. The polymer matrix strongly influences the optical properties of plasmonic nanoparticles. It is imperative to understand the interaction between plasmonic nanoparticles and polymers so that one can …
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Nanoscale Investigation of Adhesion, Friction, and Wear in Chemically Heterogeneous Responsive Polymer Brushes
Polymer brushes provide the responsive smart surfaces which can be used for fabrication of various devices. In this thesis work, adhesion, friction, and wear of polystyrene (PS) - poly(2-vinyl pyridine) (P2VP) and polystyrene - poly(acrylic acid) (PAA) binary brushes and corresponding monobrushes …
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Mechanochemical activation at solid interfaces
… not observed in bulk mechanochemically active polymers. Local activation of a MA mechanophore functionalized polymer brush-silicon interface is achieved with atomic force microscopy (AFM) lithography. Active specimens with MA mechanophore functionalized between a PGMA polymer brush-silica …
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Functional surface-initiated polymers: Device applications and polymerization techniques
Self-assembled monolayers and surface-initiated polymer, or polymer brushes, have attracted attention as they form dense layers with much higher structural order than bulk or solution polymers. Another field of research which has emerged over the last two decades is the field of organic and polymer …
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Immobilization of Inorganic Nanoparticles on Responsive Polymer Brushes
Exploitation of well defined responsive polymer brushes for direct and controlled immobilization of metal/semiconductor nanoparticles on macroscopic surfaces has been demonstrated. The employed approach offers the possibility of the organization of a variety of inorganic nanoparticles by …
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Direct Single Molecule Imaging of Enhanced Diffusion for Enzymes and Enzyme-conjugated Dna origami
… We tried different surface coating methods (polymer brush coated surface and lipid bilayer coated surface) and different viscosity agents (methylcellulose and glycerol) to slow diffusion and facilitate tracking. We found that high amounts of glycerol inhibited enzyme activity, resulting in …
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Synthesis and kinetic processes in designed polymers
Traditional polymers have been long used for commercial products from polyester shirts to polyvinyl chloride (PVC) pipes or even polytetrafluoroethane (Teflon) non-stick coatings. As the needs of our society grow and change, innovative solutions must be created to overcome the challenges that …
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