Single Polymer Dynamics for Molecular Rheology

Abstract

Single polymer dynamics offers a powerful approach to study molecular-level interactions and dynamic microstructure in materials. Direct visualization of single chain dynamics has uncovered new ideas regarding the rheology and non-equilibrium dynamics of macromolecules, including the importance of molecular individualism, dynamic heterogeneity, and molecular sub-populations that govern macroscale behavior. In recent years, the field of single polymer dynamics has been extended to increasingly complex materials, including architecturally complex polymers such as combs, bottlebrushes, and ring polymers and entangled solutions of long chain polymers in flow. Single molecule visualization, complemented by modeling and simulation techniques such as Brownian dynamics and Monte Carlo methods, allow for unparalleled access to the molecular-scale dynamics of polymeric materials. In this review, recent progress in the field of single polymer dynamics is examined by highlighting major developments and new physics to emerge from these techniques. The molecular properties of DNA as a model polymer are examined, including the role of flexibility, excluded volume interactions, and hydrodynamic interactions in governing behavior. Recent developments in studying polymer dynamics in time-dependent flows, new chemistries and new molecular topologies, and the role of intermolecular interactions in concentrated solutions are considered. Moreover, cutting-edge methods in simulation techniques are further reviewed as an ideal complementary method to single polymer experiments. Future work aimed at extending the field of single polymer dynamics to new materials promises to uncover original and unexpected information regarding the flow dynamics of polymeric systems.

82 pages, 11 figures, review

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• Accurate estimate of the critical exponent $\nu$ for self-avoiding walks via a fast implementation of the pivot algorithm
• Metastable tight knots in a worm-like polymer
• High-precision estimate of the hydrodynamic radius for self-avoiding walks
• Direct observation of DNA dynamics in semi-dilute solutions in extensional flow
• Role of External Flow and Frame Invariance in Stochastic Thermodynamics
• Direct measurement of the intermolecular forces confining a single molecule in an entangled polymer solution
• Effect of stretching-induced changes in hydrodynamic screening on coil-stretch hysteresis of unentangled polymer solutions
• Dynamical Slowdown of Polymers in Laminar and Random Flows
• Parameter-free prediction of DNA dynamics in planar extensional flow of semidilute solutions
• Rotation-induced macromolecular spooling of DNA

Cited by in corpus (31)

• Pore-Scale Flow Characterization of Polymer Solutions in Microfluidic Porous Media
• Morphological transitions of elastic filaments in shear flow
• Dynamically Heterogeneous Relaxation of Entangled Polymer Chains
• Universal dynamics of dilute and semidilute solutions of flexible linear polymers
• Transition to the viscoelastic regime in the thinning of polymer solutions
• Orientation control and nonlinear trajectory tracking of colloidal particles using microfluidics
• A 4-channel microfluidic hydrodynamic trap for droplet deformation and coalescence in extensional flows
• Flow topology during multiplexed particle manipulation using a Stokes Trap
• Shear thinning in dilute and semidilute solutions of polystyrene and DNA
• Dynamics and Rheology of Ring-Linear Blend Semidilute Solutions in Extensional Flow: Single Molecule Experiments
• How do polymers stretch in capillary-driven extensional flows?
• OpTiDDM (Optical Tweezers integrating Differential Dynamic Microscopy) maps the spatiotemporal propagation of nonlinear stresses in polymer blends and composites
• Dynamics and Rheology of Ring-Linear Blend Semidilute Solutions in Extensional Flow: Modeling and Molecular Simulations
• Heterogeneous interactions and polymer entropy decide organization and dynamics of chromatin domains
• Rheological consequences of wet and dry friction in a dumbbell model with hydrodynamic interactions and internal viscosity
• Dynamic Flow Control Through Active Matter Programming Language
• Simulation of semidilute polymer solutions in planar extensional via conformationally averaged Brownian noise
• Dilute polymer solutions under shear flow: comprehensive qualitative analysis using a bead-spring chain model with a FENE-Fraenkel spring
• Characteristic features of self-avoiding active Brownian polymers under linear shear flow
• Wall-anchored semiflexible polymer under large amplitude oscillatory shear flow
• Signatures of elastoviscous buckling in the dilute rheology of stiff polymers
• Tethered Semiflexible Polymer under Large Amplitude Oscillatory Shear
• Supercoiled ring polymers under shear flow
• Effect of internal friction on the coil-stretch transition in turbulent flows
• Activity-enhanced shear thinning of flexible linear polar polymers
• Uniaxial extensional viscosity of semidilute DNA solutions
• Self-attractive semiflexible polymers under an external force field
• Single-molecule force spectroscopy with photoluminescent semiconducting polymers: Harnessing entropy
• Topological digestion drives time-varying rheology of entangled DNA fluids
• Design of model Boger fluids with systematically controlled viscoelastic properties
• Turbulent stretching of dumbbells with hydrodynamic interactions: an analytical study