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The effect of polymer charge density and charge distribution on the formation of multilayers

: Voigt, U.; Khrenov, V.; Tauer, K.; Hahn, M.; Jaeger, W.; Klitzing, R. von


Journal of Physics. Condensed Matter 15 (2003), Nr.1, S.S213-S218
ISSN: 0953-8984
Fraunhofer IAP ()

Polyelectrolyte multilayers which are built up by alternating adsorption of polyanions and polycations from aqueous solutions at a solid interface are investigated by reflectometry and ellipsometry. Below a degree of charge of about 70% the adsorption stops after a certain number of dipping cycles and no multilayer formation occurs. This indicates an electrostatically driven adsorption process. Below a charge density of 70% an adsorption can take place if the charged segments are combined as a block of the polymer.