This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.1021/acsmacrolett.3c00409 in citations.
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2023-03207 in citations.
Interchain Hydrodynamic Interaction and Internal Friction of Polyelectrolytes
Interchain Hydrodynamic Interaction and Internal Friction of Polyelectrolytes
Polyelectrolytes (PE) are polymeric macromolecules in aqueous solutions characterized by their chain topology and intrinsic charge in a neutralizing fluid. Structure and dynamics are related to several characteristic screening length scales determined by electrostatic, excluded volume, and hydrodyna...
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Personal Name(s): | Buvalaia, Ekaterina |
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Kruteva, Margarita / Hoffmann, Ingo / Radulescu, Aurel / Förster, Stephan / Biehl, Ralf (Corresponding author) | |
Contributing Institute: |
JCNS-4; JCNS-4 JCNS-FRM-II; JCNS-FRM-II Neutronenstreuung und biologische Materie; IBI-8 Heinz Maier-Leibnitz Zentrum; MLZ Neutronenstreuung; JCNS-1 |
Published in: | ACS Macro Letters, 12 (2023) XXX, S. 1218 - 1223 |
Imprint: |
Washington, DC
ACS
2023
|
DOI: |
10.1021/acsmacrolett.3c00409 |
DOI: |
10.34734/FZJ-2023-03207 |
Document Type: |
Journal Article |
Research Program: |
Materials – Quantum, Complex and Functional Materials Jülich Centre for Neutron Research (JCNS) (FZJ) |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2023-03207 in citations.
Polyelectrolytes (PE) are polymeric macromolecules in aqueous solutions characterized by their chain topology and intrinsic charge in a neutralizing fluid. Structure and dynamics are related to several characteristic screening length scales determined by electrostatic, excluded volume, and hydrodynamic interactions. We examine PE dynamics in dilute to semidilute conditions using dynamic light scattering, neutron spinecho spectroscopy, and pulse field gradient NMR spectroscopy. We connect macroscopic diffusion to segmental chain dynamics, revealing a decoupling of local chain dynamics from interchain interactions. Collective diffusion is described within a colloidal picture, including electrostatic and hydrodynamic interactions. Chain dynamics is characterized by the classical Zimm model of a neutral chain retarded by internal friction. We observe that hydrodynamic interactions are not fully screened between chains and that the internal friction within the chain increases with an increase in ion condensation on the chain. |