Length Scale Dependence of the Dynamic Properties of Hyaluronic Acid Solutions in the Presence of Salt
- CNRS-UMR
In solutions of the charged semirigid biopolymer hyaluronic acid in salt-free conditions, the diffusion coefficient D{sub NSE} measured at high transfer momentum q by neutron spin echo is more than an order of magnitude smaller than that determined by dynamic light scattering, D{sub DLS}. This behavior contrasts with neutral polymer solutions. With increasing salt content, D{sub DLS} approaches D{sub NSE}, which is independent of ionic strength. Contrary to theoretical expectation, the ion-polymer coupling, which dominates the low q dynamics of polyelectrolyte solutions, already breaks down at distance scales greater than the Debye-Hueckel length.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1002916
- Journal Information:
- J. Phys. Chem. B, Vol. 114, Issue (47) ; 12, 2010; ISSN 1520-6106
- Country of Publication:
- United States
- Language:
- ENGLISH
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