One-dimensional oxide on stepped rhodium

Top: STM image showing the "normal" two-dimensional surface oxide on Rh(111) and the one-dimensional "wavy" oxide on the steps of a Rh(335) facet. Bottom: calculated structure of the wavy one-dimensional oxide on Rh(335). Note the chains of Rh atoms surrounded by squares of four oxygen atoms. See: J. Klikovits, M. Schmid, L.R. Merte, P. Varga, R. Westerström, A. Resta, J. N. Andersen, J. Gustafson, A. Mikkelsen, E. Lundgren, F. Mittendorfer, G. Kresse, Step-orientation-dependent oxidation: from 1D to 2D oxides. Phys. Rev. Lett. 101 (2008) 266104