Anisotropic Diffusion of Polyelectrolyte Chains within Multilayer Films.
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ABSTRACT:
SUBMITTER: Xu L
PROVIDER: S-EPMC3454581 | biostudies-literature | 2011 Nov
REPOSITORIES: biostudies-literature
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Anisotropic Diffusion of Polyelectrolyte Chains within Multilayer Films.
Xu Li L Kozlovskaya Veronika V Kharlampieva Eugenia E Ankner John F JF Sukhishvili Svetlana A SA
ACS macro letters 20111101 1
We have 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 ...[more]
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