TY  - JOUR
AU  - Buvalaia, Ekaterina
AU  - Kruteva, Margarita
AU  - Hoffmann, Ingo
AU  - Radulescu, Aurel
AU  - Förster, Stephan
AU  - Biehl, Ralf
TI  - Interchain Hydrodynamic Interaction and Internal Friction of Polyelectrolytes
JO  - ACS Macro Letters
VL  - 12
IS  - 9
SN  - 2161-1653
CY  - Washington, DC
PB  - ACS
M1  - FZJ-2023-03207
SP  - 1218 - 1223
PY  - 2023
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - 37624592
UR  - <Go to ISI:>//WOS:001190534800001
DO  - DOI:10.1021/acsmacrolett.3c00409
UR  - https://juser.fz-juelich.de/record/1014223
ER  -