| Issue |
Europhys. Lett.
Volume 41, Number 4, february II 1998
|
|
|---|---|---|
| Page(s) | 467 - 472 | |
| Section | Cross-disciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i1998-00175-8 | |
| Published online | 01 September 2002 | |
Dynamics of the swelling or collapse of a homopolymer
Service de Physique Théorique,
Centre d'Etudes de Saclay, CEA, 91191 Gif-sur-Yvette,
France
Corresponding author: pitard@spht.saclay.cea.fr
Received:
11
February
1997
Accepted:
17
December
1997
We study the dynamics of a polymer
when it is quenched from a θ to a good
or bad solvent, by means of a Langevin equation.
The variation of the radius of gyration is studied
as a function of time.
For the first stage of collapse
or swelling, the characteristic time scale is found to be proportional to
.
Other scaling laws are derived
for the diffusion regime at larger times.
Although the present model is solved
only for homopolymers and does not
include hydrodynamic interactions, these results
may be a first step towards the understanding
of the early stages of protein folding.
PACS: 83.10.Nn – Polymer dynamics / 87.15.Da – Physical chemistry of solutions of biomolecules; condensed states / 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion
© EDP Sciences, 1998
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