Tassieri, M. , Evans, R., Barbu-Tudoran, L., Khaname, G., Trinick, J. and Waigh, T. (2008) Dynamics of semiflexible polymer solutions in the highly entangled regime. Physical Review Letters, 101(19), (doi: 10.1103/PhysRevLett.101.198301)
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Publisher's URL: http://dx.doi.org/10.1103/PhysRevLett.101.198301
Abstract
We present experimental evidence that the effective medium approximation (EMA), [D. C. Morse, Phys. Rev. E 63, 031502 (2001)], provides the correct scaling law of the plateau modulus G<sup>0</sup>∝ρ<sup>4/3</sup>L<sub>p</sub><sup>-1/3</sup> (with ρ the contour length per unit volume and Lp the persistence length) of semiflexible polymer solutions, in the highly entangled regime. Competing theories, including a binary collision approximation (BCA), instead predict G<sup>0</sup>∝ρ<sup>7/5</sup>L<sub>p</sub><sup>-1/5</sup>. We have tested both predictions using F-actin solutions which permit experimental control of Lp independently of other parameters. A combination of video particle tracking microrheology and dynamic light scattering yields independent measurements of G<sup>0</sup> and L<sub>p</sub>, respectively. Thus we can distinguish between the two proposed laws, in contrast to previous experimental studies focused on the (less discriminating) concentration dependence.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Tassieri, Dr Manlio |
Authors: | Tassieri, M., Evans, R., Barbu-Tudoran, L., Khaname, G., Trinick, J., and Waigh, T. |
College/School: | College of Science and Engineering > School of Engineering > Biomedical Engineering College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Physical Review Letters |
Publisher: | American Physical Society |
ISSN: | 0031-9007 |
ISSN (Online): | 1079-7114 |
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