Dynamic charge density correlation function in weakly charged polyampholyte globules

Details Dynamic charge density correlation function in weakly charged polyampholyte globules Dynamic charge density correlation function in weakly charged polyampholyte globules

1999-11-19

arxiv.org/abs/cond-mat/9911296v2

Physics

Condensed Matter

12 pages RevTex, 1 figure ps, PACS 61.25.Hq, reason replacement: Expression for dynamic corr. function g(k,t) in old version w

Scientific paper

We study solutions of statistically neutral polyampholyte chains containing a large fraction of neutral monomers. It is known that, even if the quality of the solvent with respect to the neutral monomers is good, a long chain will collapse into a globule. For weakly charged chains, the interior of this globule is semi-dilute. This paper considers mainly theta-solvents, and we calculate the dynamic charge density correlation function g(k,t) in the interior of the globules, using the quadratic approximation to the Martin-Siggia-Rose generating functional. It is convenient to express the results in terms of dimensionless space and time variables. Let R be the blob size, and let T be the characteristic time scale at the blob level. Define the dimensionless wave vector q = R k, and the dimensionless time s = t/T. We find that for q<1, corresponding to length scales larger than the blob size, the charge density fluctuations relax according to g(q,s) = q^2(1-s^(1/2)) at short times s < 1, and according to g(q,s) = q^2 s^(-1/2) at intermediate times 1 < s < q^(-4). We expect these results to be valid for wave vectors q > 0.1, where entanglements are unimportant.

Affiliated with

Also associated with

No associations

Rating

Dynamic charge density correlation function in weakly charged polyampholyte globules does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dynamic charge density correlation function in weakly charged polyampholyte globules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic charge density correlation function in weakly charged polyampholyte globules will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-413956