NDLI: Double-exponential decay of orientational correlations in semiflexible polyelectrolytes

Content Provider	Springer Nature Link
Author	Bačová, P. Košovan, P. Uhlík, F. Kuldová, J. Limpouchová, Z. Procházka, K.
Copyright Year	2012
Abstract	In this paper we revisited the problem of persistence length of polyelectrolytes. We performed a series of Molecular Dynamics simulations using the Debye-Hückel approximation for electrostatics to test several equations which go beyond the classical description of Odijk, Skolnick and Fixman (OSF). The data confirm earlier observations that in the limit of large contour separations the decay of orientational correlations can be described by a single-exponential function and the decay length can be described by the OSF relation. However, at short countour separations the behaviour is more complex. Recent equations which introduce more complicated expressions and an additional length scale could describe the results very well on both the short and the long length scale. The equation of Manghi and Netz when used without adjustable parameters could capture the qualitative trend but deviated in a quantitative comparison. Better quantitative agreement within the estimated error could be obtained using three equations with one adjustable parameter: 1) the equation of Manghi and Netz; 2) the equation proposed by us in this paper; 3) the equation proposed by Cannavacciuolo and Pedersen. Two characteristic length scales can be identified in the data: the intrinsic or bare persistence length and the electrostatic persistence length. All three equations use a single parameter to describe a smooth crossover from the short-range behaviour dominated by the intrinsic stiffness of the chain to the long-range OSF-like behaviour.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	12928941
Journal	The European Physical Journal E
Volume Number	35
Issue Number	6
e-ISSN	1292895X
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2012-06-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Soft Matter: Polymers and Polyelectrolytes Soft and Granular Matter, Complex Fluids and Microfluidics Biophysics and Biological Physics Surfaces and Interfaces, Thin Films Nanotechnology Polymer Sciences Statistical Physics, Dynamical Systems and Complexity
Content Type	Text
Resource Type	Article
Subject	Chemistry Medicine Biophysics Materials Science Surfaces and Interfaces Biotechnology

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