Anisotropic diffusion of polyelectrolyte chains within multilayer films

Li Xu; Veronika Kozlovskaya; Eugenia Kharlampieva; John F. Ankner; Svetlana A. Sukhishvili

doi:10.1021/mz200075x

Anisotropic diffusion of polyelectrolyte chains within multilayer films

Li Xu, Veronika Kozlovskaya, Eugenia Kharlampieva, John F. Ankner, Svetlana A. Sukhishvili

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

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 interacting polyelectrolytes.

Original language	English
Pages (from-to)	127-130
Number of pages	4
Journal	ACS Macro Letters
Volume	1
Issue number	1
DOIs	https://doi.org/10.1021/mz200075x
State	Published - Jan 17 2012
Externally published	Yes

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abstract = "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 interacting polyelectrolytes.",

author = "Li Xu and Veronika Kozlovskaya and Eugenia Kharlampieva and Ankner, {John F.} and Sukhishvili, {Svetlana A.}",

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AU - Kharlampieva, Eugenia

AU - Ankner, John F.

AU - Sukhishvili, Svetlana A.

PY - 2012/1/17

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AB - 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 interacting polyelectrolytes.

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Anisotropic diffusion of polyelectrolyte chains within multilayer films

Abstract

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