Dynamics of end to end loop formation for an isolated chain in viscoelastic fluid
arXiv:1204.1026 · doi:10.1016/j.physa.2012.06.025
Abstract
We theoretically investigate the looping dynamics of a linear polymer immersed in a viscoelastic fluid. The dynamics of the chain is governed by a Rouse model with a fractional memory kernel recently proposed by Weber et al. (S. C. Weber, J. A. Theriot, and A. J. Spakowitz, Phys. Rev. E 82, 011913 (2010)). Using the Wilemski-Fixman (G. Wilemski and M. Fixman, J. Chem. Phys. 60, 866 (1974)) formalism we calculate the looping time for a chain in a viscoelastic fluid where the mean square displacement of the center of mass of the chain scales as t^(1/2). We observe that the looping time is faster for the chain in viscoelastic fluid than for a Rouse chain in Newtonian fluid up to a chain length and above this chain length the trend is reversed. Also no scaling of the looping time with the length of the chain seems to exist for the chain in viscoelastic fluid.
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Cited by in corpus (6)
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- Tracer diffusion in a sea of polymers with binding zones: mobile vs frozen traps
- Looping and reconfiguration dynamics of a flexible chain with internal friction
- Reconfiguration Dynamics in folded and intrinsically disordered protein with internal friction: Effect of solvent quality and denaturant
- Looping dynamics of flexible chain with internal friction at different degree of compactness
- Non-Markovian closure kinetics of flexible polymers with hydrodynamic interactions