TY  - JOUR
A1  - Glinel, Karine
A1  - Laschewsky, André
A1  - Jonas, Alain M.
T1  - Ordered polyelectrolyte "multilayers" : 4. internal structure of clay-based multilayers
N2  - We report on the growth and structure of hybrid clay-based multilayers obtained by electrostatic self-assembly (also known as layer-by-layer assembly) of poly(diallylpyrrolidinium bromide) and a synthetic hectorite (Laponite). By combining ellipsometry, atomic force microscopy, and specular and off-specular grazing angle X-ray scattering measurements, we show that platelets pack in the vertical direction according to a distribution of distances between nearest neighbors of about 3 Å standard deviation. The accumulation of such random fluctuations in the vertical direction results in the loss of layering of the platelets farther than about 75 Å from the substrate. In this respect, most of the film should be considered as a nanocomposite with preferential orientation of the platelets, rather than as a real multilayer. The model is quantitatively supported by simulations of the specular and off-specular scattering of such multilayers.
Y1  - 2002
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/17452
ER  -