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 7 of 7 for “"planar extensional flow"”.
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Single molecule studies of flexible polymer systems
… imaged single ssDNA polymers stretching in fluid flows in microfluidic devices (Chapter 2). In addition, we have developed an automated flow-based method to isolate individual polymer chains for long periods of time in planar extensional flow (Chapter 3). By combining the tools we developed we …
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Coupling molecular conformation to polymer chemistry and composition via flow
… behavior of polymers in the presence of fluid flow over the past century. There remain, however, fundamental questions about how flows couple to molecular degrees of freedom and vice versa. This pressing problem has profound implications in polymer processing in industry, both for traditional …
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Single polymer dynamics in semi-dilute solutions: linear and ring polymers
… intermolecular interactions in non-equilibrium flows. Over the past two decades, single molecule techniques have been established to investigate molecular-level dynamics, thereby allowing direct access to polymer chain relaxation mechanisms and polymer non-linear response under a variety of …
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Automated hydrodynamic trap for single cell analysis in free solution
… free solution by the sole action of gentle fluid flow, thereby enabling non-perturbative trapping of cells for long time scales. Recent studies have reported the ability of biological systems to implement lowpass filters to distinguish high frequency noise in environmental stimuli from lower …
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Single molecule studies of branched polymer dynamics
… the dynamics of single branched polymers in flow using a molecular rheology approach. In one experiment, we study the dynamics of asymmetric star, H-shaped, and comb-shaped DNA polymers tethered to the surface in a microfluidic flow cell (Chapter 4). In this way, we study the impact of branch …
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Single molecule studies of polymers and self-assembling materials: Effects of chain topology and entanglements
… and functional materials in nonequilibrium flow conditions is of key importance for controlling materials properties during processing, which often involves highly nonequilibrium states that cannot be understood in terms of equilibrium principles or thermodynamics. From this view, it is …
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The dynamics of polymer solutions: Effects of concentration, chain architecture, and flow
… rheological response of solutions in processing flows. Additionally, the non-equilibrium conformations which result from these flows often determine the continuum level material properties of the end product, such as the tensile strength of polymeric fibers and the power conversion efficiency of …