Anisotropic Diffusion of Polyelectrolyte Chains within Multilayer Films.
Anisotropic Diffusion of Polyelectrolyte Chains within Multilayer Films.
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DOI:
10.1021/mz200075x
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发表时间:
2011-11-30
影响因子:
7.015
通讯作者:
Sukhishvili SA
中科院分区:
文献类型:
--
作者:
Xu L;Kozlovskaya V;Kharlampieva E;Ankner JF;Sukhishvili SA
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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