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The European Physical Journal B
ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)
Abstract Volume 4 Issue 3 (1998) pp 307-312
Polyelectrolyte/post collisions during electrophoresis: Influence of hydrodynamic interactions
P. André (a), D. Long, A. Ajdari
Laboratoire de Physico-Chimie Théorique, ESA CNRS 7083, ESPCI, 10 rue Vauquelin, 75231 Paris Cedex 05, France
Received: 18 March 1998 / Received in final form and accepted: 20 May 1998
Abstract: We consider the interaction of an homogeneous polyelectrolyte with an obstacle during electrophoretic drift. We explicitly take into account the hydrodynamic interactions generated by this mechanical trapping, and we evaluate their influence on the unhooking process. Important qualitative effects are pointed out in low and moderate field regimes. However, numerical simulations indicate that, in strong field, the existing simpler local force models, which neglect these hydrodynamic interactions, are quantitatively acceptable.
PACS. 87.15.He Molecular dynamics and conformational changes - 82.45.+z Electrochemistry and electrophoresis - 36.20.-r Macromolecules and polymer molecules
(a) email: andre@hogarth.pct.espci.fr
Article in PDF-Format (3095 KB)
Online publication: August 17, 1998
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