Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
102 (1995), S. 5506-5511
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
We present analytic calculations of the electrophoretic mobility of stiff charged molecules in solution, and results obtained by using different approximations for the hydrodynamic interactions are discussed. For low fields, where the average molecular conformation is hardly distorted from its Gaussian shape, we find an increase of the mobility with molecular size which, for chains up to 1000 segment lengths, follows approximately a power law with an exponent B. For sufficiently high counterion concentration (λD(approximately-less-than)segment length) B is independent of the Debye length λD. Under the simplified assumption of spherical distributed counterions we find B to be proportional to the Debye length for λD larger than the segment length, except for the limits of Gaussian and rigid rod-type molecules. A brief comparison with numerical simulations is included. © 1995 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.469280
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