| Issue |
Europhys. Lett.
Volume 38, Number 4, May I 1997
|
|
|---|---|---|
| Page(s) | 279 - 284 | |
| Section | Condensed matter: structure, thermal and mechanical properties | |
| DOI | https://doi.org/10.1209/epl/i1997-00238-x | |
| Published online | 01 September 2002 | |
Persistence length of weakly charged polyelectrolytes with variable intrinsic stiffness
Max-Planck-Institut für Polymerforschung, Postfach 3184, D-55021 Mainz, Germany
Received:
4
July
1996
Accepted:
20
March
1997
We present simulations of a basic model of weakly charged polyelectrolyte
chains of variable intrinsic stiffness within the Debye-Hückel approximation.
Starting from the sublinear dependence of the electrostatic persistence length
Le on the screening parameter for flexible chains, the corresponding
effective exponent y (
) crosses over to values up
to 2 when the intrinsic persistence length L0 exceeds the electrostatic one
Le. LP shows a pronounced minimum with increasing intrinsic
stiffness due to the occurrence of two relevant length scales which influence each other.
This makes the concept of a unique persistence length for these systems
questionable.
PACS: 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling / 36.20.-r – Macromolecules and polymer molecules / 87.15.-v – Molecular biophysics
© EDP Sciences, 1997
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