Rivista del Consiglio Nazionale delle Ricerche
Vol.5 n.1 Giugno 2000		Read Issue PDF Version Issues Published
Cover photo: The lower thick polystyrene layer is tiled with the two-dimensional neutron scattering pattern exhibited by the thin fuilm of poly(methyl-methacrylate) lying on top of it. The Bragg peaks, the result of interference between the front and back of the top film, are clearly visible. The van der Waals forces across the film tends to destabilise the system, resulting in spinoidal dewetting which manifests itself as a pattering of the film surface (data taken with the SURF Reflectometer at ISIS, courtesy of ISIS facility).