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Visualization and Thickness Measurement of Polyelectrolytes Multilayers in Dry and in Solution
Different polyelectrolytes multilayers are studied by SARFUS 3D IMM system both in dry and in solution. Thickness
measurements of the layers are realized and compared to measurements done with ellipsometry. In this study, we
are able to see in real time images of the sample that give us information on the layer homogeneity and structure.
SARFUS measurements show as ellipsometry measurements, the layers construction and growth. Moreover, we
highlight the swelling behavior of layers by doing measurements in dry and in solution of salt.
SARFUS: Study of layer-by-layer polyelectrolyte deposition
In recent years, intensive studies have been carried out on the preparation of multilayer systems by the so-called layer-by-layer method (LbL)1. This technique based on the successive deposition of very thin layers makes it possible to produce materials with complex properties. In typical processes, two water-soluble polyelectrolytes possessing groups with opposite charges are alternatively deposited by electrostatic attraction on flat surfaces such as glass and silicon substrates.
