Electrophoresis simulated with the cage model for reptation

Details Electrophoresis simulated with the cage model for reptation Electrophoresis simulated with the cage model for reptation

1999-06-07

arxiv.org/abs/cond-mat/9906090v1

Physics

Condensed Matter

Statistical Mechanics

14 pages, 9 pictures, 2 tables

Scientific paper

The cage model for polymer reptation is extended to simulate DC electrophoresis. The drift velocity v of a polymer with length L in an electric field with strength E shows three different regions: if the strength of field is small, the drift velocity scales as E/L; for slightly larger strengths, it scales as E^2, independent of length; for high fields, but still E much smaller than 1, the drift velocity decreases exponentially to zero. The behaviour of the first two regions are in agreement with earlier reports on simulations of the Duke-Rubinstein model and with experimental work on DNA polymers in agarose gel.

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