| Issue |
Europhys. Lett.
Volume 76, Number 2, October 2006
|
|
|---|---|---|
| Page(s) | 346 - 352 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2006-10254-x | |
| Published online | 13 September 2006 | |
Diffusion of a single semiflexible charged polymer
1
Physics Department, TU Munich - 85748 Garching, Germany
2
Center for Nanoscience, Physics Department, LMU Munich 80539 München, Germany
Received:
19
June
2006
Accepted:
22
August
2006
The diffusion of charged semiflexible polymers is studied by hydrodynamic simulations.
The salt-dependent diffusion constant exhibits a shallow minimum at a
screening length comparable to the polymer length.
Fluorescence correlation spectroscopy data for
ds-DNA fragments confirm the relative insensitivity of diffusion
over a wide range of salt concentrations.
A scaling expression for the diffusion constant of a neutral semiflexible chain
encompassing the rod, the intermediate ideal and
the asymptotic swollen regime is constructed.
PACS: 87.15.Vv – Diffusion / 66.10.-x – Diffusion and ionic conduction in liquids / 87.64.Tt – Confocal microscopy
© EDP Sciences, 2006
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