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 11 of 11 for “"Ring polymers"”.
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Single polymer dynamics in semi-dilute solutions: linear and ring polymers
"Synthetic and biological polymers are ubiquitous in nature and modern technologies. Traditional characterization methods of polymeric materials rely on bulk level measurements that can provide useful information on material properties. However, these methods generally cannot access underlying …
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Molecular-dynamics simulations of polymers in a solvent
… were carried out for linear, flexible polymers in a solvent environment. Both static and dynamic properties were calculated for polymer chains of 8, 16, 24, 32, and 40 monomers in length. The effects of solvent density on the diffusion coefficient, the average radius of gyration, and …
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An Analysis of Three Path-Integral Based Approximations to Quantum Dynamics
… for removing contributions from delocalised ring polymers in centroid molecular dynamics calculations, in which they are known to cause artificial red shifts in vibrational spectra. We apply the WCMD method to two dimensional test systems and find that by filtering out the delocalised ring …
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Nonlinear machine learning of macromolecular folding and self-assembly
… the dynamics and configuration of linear and ring polymers. Integrating statistical mechanics with dynamical systems theory, I establish a means to determine single molecule folding funnels from univariate time series in experimentally accessible observables. In the second aspect, I utilize …
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Single molecule studies of polymers and self-assembling materials: Effects of chain topology and entanglements
… 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 essential to understand the rheological behavior of complex fluids in order to …
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Single molecule studies of flexible polymer systems
… polymer chains, such as synthetic organic polymers. This thesis presents a new methodology for studying truly flexible polymers at the single molecule level. We have demonstrated the ability to synthesize long strands of fluorescentlylabeled ssDNA, and we directly imaged single ssDNA …
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Ring polymer dynamics in dilute and concentrated solutions with advances in automated flow control
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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A Transfer Matrix Approach to Studying the Entanglement Complexity of Self-Avoiding Polygons in Lattice Tubes
… (SAPs) are a well-established useful model of ring polymers and they have also proved useful for addressing DNA topology questions. Motivated by exploring the effects of confinement on DNA topology, in this thesis, SAPs are confined to a tubular sublattice of the simple cubic lattice. Transfer …
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Viscoelastic and nanomechanical behaviors of polymeric materials
The mechanical and viscoelastic properties of polymers at different length scales (from nanometers to bulk) have attracted great attention. One method recently widely used to characterize the nanomechanical properties of materials is nanoindentation technique. For nanoindentation of polymers, in …
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The dynamics of polymer solutions: Effects of concentration, chain architecture, and flow
… The microscopic conformational dynamics of polymers are directly related to the 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, …
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Single molecule studies of branched polymer dynamics in non-dilute solutions
The macroscopic properties of polymers are dictated by their molecular architecture and microstructure. Branched polymers exhibit a multitude of distinct rheological phenomena, such as shear thinning and enhanced strain hardening, compared to linear polymers as a direct consequence of their …