Thickness and density profiles of polyelectrolyte brushes: dependence on grafting density and salt concentration |
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Authors: | Romet-Lemonne G Daillant J Guenoun P Yang J Mays J W |
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Institution: | Service de Physique de l'Etat Condensé, Orme des Merisiers, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France. |
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Abstract: | We have performed neutron reflectivity measurements on a monolayer of charged diblock copolymers in a Langmuir trough, and determined precise density profiles of the polyelectrolyte brush at different densities. We obtain profiles in good agreement with existing self-consistent field computations, both for the osmotic and the salted brush regime. We show that the osmotic brush's thickness increases with density. |
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