Zerball, M.; Soltwedel, O.; von Klitzing, R.; Köhler, R.: Inflence of diffusion and dipping time on the inner structure of polyelectrolyte multilayers. In: Annual Report 2012 / Heinz Maier-Leibnitz Zentrum (MLZ). Garching, 2013, p. 81-82
http://www.mlz-garching.de/englisch/news-und-media/brochures-und-films/annual-reports/2012.html

Abstract:
Neutron Reflctometry was used to investigate the inflence of two fundamental preparation parameters -time and salt concentration- on the internal structure and swelling behavior of strong Polyelectrolyte Multilayers (PEM) exposed to water. A two-block structure of a deuterated and a protonated stack of PEM was built to reveal variations in the inner structure of PEM with respect to its vertical position relative to the solid substrate. Contrary to the common perception, no signifiant change in internal roughness was observed for different preparation time. The extent of swelling of PEM in water (D2O) appears strongly inflenced by the distance of the polyelectrolyte from the substrate.