Type of Document Dissertation Author Jaber, Jad Ali Author's Email Address email@example.com URN etd-11102005-173059 Title Polyelectrolyte Multilayers: An Odyssey through Interdisciplinary Science Degree Doctor of Philosophy Department Chemistry and Biochemistry, Department of Advisory Committee
Advisor Name Title Joseph B. Schlenoff Committee Chair P. Bryant Chase Committee Co-Chair Andre M. Striegel Committee Member Timothy M. Logan Committee Member Keywords
- Mechanical Properties
- Ion Pairing
- Free Energy
- Temperature Responsive Polymers
Date of Defense 2005-10-10 Availability unrestricted AbstractThis dissertation provides an overview of a self assembled multi-layer technique based on the alternating deposition of oppositely charged polyelectrolytes onto charged solid supports. The basic principles and methodologies governing this technique are laid down, and new strategies are built upon the latter in an effort to develop innovative technologies that would be beneficial for making new products, or improving the quality of existing ones.
Fundamental studies to characterize the water content, efficiency and differential strength of ion-pairing, topology, and viscoelastic properties of polyelectrolyte multilayers, PEMUs, are illustrated and conducted. Also, the synthesis of charged copolymers of poly(N-isopropylacrylamide), (PNIPAM), and their use to construct thermally responsive PEMU are demonstrated. In addition, the flux of a charged probe molecule, ferricyanide, through the NIPAM-rich multilayer is assessed with rotating disk electrode voltammetry. Thermally reversible modulation of ion transport is demonstrated.
Positive polyelectrolytes are also investigated as new surface coatings for promoting in vitro actomyosin motility. Two surface arrangements are studied: a monolayer of the polyelectrolyte PAH, and multilayers consisting of 11-41 layers of alternating polypositive PAH/polynegative PSS electrolytes. Micro-contact printing with a water-insoluble charged block copolymer on PAH is used to produce patterned surfaces that restrict filament motion to PAH tracks
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