January 2012

Journal

Anisotropic Diffusion of Polyelectrolyte Chains within Multi-layer Films

By:
Xu, Li; Kozlovskaya, Veronika; Kharlampieva, Eugenia; Ankner, John F; Sukhishvili, Svetlana
Journal Name:
ACS Macro Letters
Page Number:
127-130
Volume:
1
Issue Number:
1
Publication Date:
January 2012
View DOI Listing:
https://doi.org/10.1021/mz200075x

Abstract

We found diffusion of polyelectrolyte chains within multilayer films to be highly anisotropic, with the preferential chain motion parallel to the substrate. The degree of anisotropy was quantified by a combination of fluorescence recovery after photobleaching and neutron reflectometry, probing chain diffusion in directions parallel and perpendicular to the substrate, respectively. Chain mobility was controlled by ionic strength of annealing solutions and steric hindrance to ionic pairing of interacting polyelectrolytes.


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