Unfolding of polymers tethered to viscoelastic substrates.


Type
Article
Change log
Authors
Abstract

The problem of globular polymer unfolding under applied force is a widely-studied fundamental topic in biological and chemical physics, with important applications in cell biology. Much of the existing theoretical and experimental literature focuses on the case where force is applied while fixing the opposite end of the polymer chain in space. However, in a realistic biological microenvironment, forces will be applied against viscoelastic references, and the deformation of the folded polymer chain will be combined with the deformation of viscoelastic substrate. In this paper, we consider several simple viscoelastic models for the substrate, and show that its relaxation properties determine the unfolding kinetics. In particular, for low pulling forces, substrates with longer relaxation times cause lower unfolding rates for the pulled polymer chain, whereas for high forces, those substrates with longer relaxation times instead produce higher unfolding rates.

Description
Keywords
3403 Macromolecular and Materials Chemistry, 40 Engineering, 34 Chemical Sciences
Journal Title
Soft Matter
Conference Name
Journal ISSN
1744-683X
1744-6848
Volume Title
15
Publisher
Royal Society of Chemistry (RSC)
Rights
All rights reserved
Sponsorship
Engineering and Physical Sciences Research Council (EP/M508007/1)