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Showing 1 to 15 of 15 for “"semidilute"”.
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Statistical physics of semidilute polymer systems soft billiard systems
… parts. In the first part, we carefully study the semidilute regime of polymer solutions. The renormalization group (RG) method using the e-expansion has been a systematic method giving good semiquantitative agreement with both real and computer experiments for the static and dynamical properties …
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Statistical Physics of Semidilute Polymer Systems (And); Soft Billiard Systems
… parts. In the first part, we carefully study the semidilute regime of polymer solutions. The renormalization group (RG) method using the $\varepsilon$-expansion has been a systematic method giving good semiquantitative agreement with both real and computer experiments for the static and dynamical …
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The dynamics of polymer solutions: Effects of concentration, chain architecture, and flow
… above the overlap concentration c* into the semidilute regime due to intermolecular excluded volume (EV) and solvent-mediated hydrodynamic interactions (HI). At higher concentrations, polymer dynamics further slow down as entanglement effects emerge. Upon application of strong flows, polymer …
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Single molecule studies of polymers and self-assembling materials: Effects of chain topology and entanglements
… dynamics of single lambda-DNA molecules in semidilute entangled solutions (c_e < c < c**) and our results show that single polymer relaxation trajectories exhibit either a single-mode or double-mode exponential decay, which starkly contrasts relaxation behavior from ultra-dilute and …
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Depletion Attractions Between Hard Spheres: Comparisons of Theory and Experiment
… the polymer concentration relative to the dilute-semidilute crossover density, cp/cp*, as the relevant measure of depletion attraction, we find that suspension miscibility monotonically improves as Rg increases for all colloid volume fractions. This trend is in contradiction with all classic …
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Dynamics Of Anisotropic Gold Nanopartilces In Synthetic And Biopolymer Solutions
… the length-scale dependent dynamics in semidilute polymer solutions, their conjugation and interaction with a protein bovine serum albumin (BSA), and the effect of shape anisotropy on the dynamics within a crowded solution of spheres. Multiphoton fluctuation correlation spectroscopy …
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Statistical imaging of transport in complex fluids: a journey from entangled polymers to living cells
… reptational motion of polymers in entangled semidilute solutions, and active endosome transport along microtubules in living cells. We started from individual trajectories, and then converged statistically to aggregate properties of interests, with special emphasis on the fluctuations buried …
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Structure, Dynamics and Rheology of Polymer Solutions from Coarse-Grained Molecular Dynamics: Effects of Polymer Concentration, Solvent Quality and Geometric Confinement
… thinning behavior is observed in both dilute and semidilute</p> <p>solutions in non-equilibrium molecular dynamics simulations. Possible approaches to</p> <p>parameterizing phenomenological constitutive models using MD simulation data is</p> <p>explored. Subsequently, influence of solvent quality …
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Coupling molecular conformation to polymer chemistry and composition via flow
… project is a new method for the simulation of semidilute polymers in planar extensional flow that utilizes a consistently averaged method of calculating hydrodynamic interactions that greatly reduces the run time of the simulations. Through the use of the Kraynik-Reinelt boundary conditions, …
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Multilevel Monte Carlo simulation of soft matter using coarse-grained models
… a proof-of-concept multilevel algorithm for semidilute polymer solutions. Additionally, we present a detailed analysis of our algorithm and its asymptotic properties, including a broadly applicable central limit theorem.
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STUDY OF COLLOIDAL INTERACTIONS MEDIATED BY BIOMOLECULAR RECOGNITION AND BY ELECTROKINETIC FLOWS.
… on mixtures of large (dilute) and small (semidilute) spherical colloids show that such clearing effect is universal and due to an anisotropic redistribution of the small spheres around the larger ones. O(E2) electro-osmotic flows, greatly enhanced by the presence of the small spheres, can …
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Diffusion Of Gold Nanoparticles In Synthetic And Biopolymer Solutions
… the length-scale dependent dynamics in semidilute poly(ethylene glycol) (PEG)-water, bovine serum albumin (BSA)-phosphate buffer, dextran and particulate solutions. In case of PEG-water solutions, fluctuation correlation spectroscopy was used to measure the diffusion coefficients (D) of …
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Polymer Dispersity Affects Conformation of Brushes Grafted on Nanoparticles
… but was less dependent on Đ at high N_w in the semidilute polymer brush (SDPB) regime. We proposed that the variation of l_b with Đ in the CPB regime was due to the presence of a stretched conformation of the stem near the particle surface in high-Đ brushes. SANS data obtained from low- and …
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Dynamics of nanoparticles in complex fluids.
… <p>The diffusion of gold nanoparticles in semidilute and entangled solutions of polystyrene (PS) in toluene were studied using fluctuation correlation spectroscopy (FCS). In our experiments, the particle radius (R ≈ 2.5 nm) was much smaller compared to the radius of gyration of the chain …