engleski

Silicon nanoparticles formation in annealed SiO/SiO2 multilayers

We present a study on amorphous SiO/SiO2 superlattice using grazing-incidence small-angle X-ray scattering (GISAXS). Amorphous SiO/SiO2 superlattices were prepared by high vacuum evaporation of 3 nm thin films of SiO and SiO2 (10 layers each) on Si(100) substrate. After the evaporation, samples were annealed at 1100  C for 1h in vacuum, yielding to Si nanocrystals formation. Using a Guinier approximation, the shape and the size of the crystals were obtained. The size of the growing nanoparticles in the direction perpendicular to the film surface is well controlled by the bilayer thickness. However, their size varies more significantly in the direction parallel to the film surface.

silicon; nanoparticles; multilayers

nije evidentirano