Structure of strongly charged polyelectrolyte solutions

Details Structure of strongly charged polyelectrolyte solutions Structure of strongly charged polyelectrolyte solutions

2005-09-16

arxiv.org/abs/cond-mat/0509459v2

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 3 figures

Scientific paper

10.1021/ma0607012

Molecular dynamics simulation and recent theory are used to examine density correlations in semidilute solutions of highly charged, intrinsically flexible and hydrophilic polyelectrolytes in low salt. Quantitative comparison with no adjustable parameters is made with recent scattering and osmometry experiments. Agreement is found for the polymer-polymer structure factor at intermediate wavevectors q with varying chain charge fraction f. Theory is also in agreement with simulation and experiment for the osmotic pressure, but not with q -> 0 extrapolations of scattering data that show anomalously large intensities at low q.

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