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Metal surfaces can be easily nanopatterned via ion sputtering: mounds or ripples can be created depending on the surface symmetry and temperature. However, in many cases these structures are unstable at room temperature and above, due to the adatom fast diffusion. This fact prevents the use of such systems as substrate or nanostamps for a technological implementation. In this paper we present a spot profile analysis low energy electron diffraction (SPA-LEED) study on the nanopatterning of a Rh(1 1 0) single crystal. Like the other (1 1 0) metal surfaces, previously investigated, also Rh(1 1 0) shows for increasing temperatures a transition between different rippled morphologies. The main advantage of this system is its stability at room temperature. From SPA-LEED data we can measure the structural features (average periodicity and local faceting) of the observed rippled structures.
Publication date: 
1 Apr 2005

Alessandro Molle, F Buatier de Mongeot, F Granone, R Buzio, G Firpo, C Boragno, U Valbusa

Biblio References: 
Volume: 230 Issue: 1-4 Pages: 555-559
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms