Extreme dependence of dynamics on concentration in highly crowded polyelectrolyte solutions.

ABSTRACT: Charge-carrying species, such as polyelectrolytes, are vital to natural and synthetic processes that rely on their dynamic behavior. Through single-particle tracking techniques, the diffusivity of individual polyelectrolyte chains and overall system viscosity are determined for concentrated polylysine solutions. These studies show scaling dependences of D ~ c^-6.1 and η ~ c^7.2, much stronger than theoretical predictions, drawing the applicability of power law fits into question. Similar trends are observed in concentrated solutions prepared at various pH and counterion conditions. These hindered system dynamics appear universal to polyelectrolyte systems and are attributed to the large effective excluded volumes of polyelectrolyte chains inducing g

SUBMITTER: Landfield H 

PROVIDER: S-EPMC11221520 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature