Atomic structures and atomic steps in the reconstruction of Pt (001) surfaces, induced by nanosecond-pulsed-laser heating, were observed in the field-ion microscope. The Pt (001) surface reconstructed during annealing via a disordered phase. However, the closely packed atomic rows of the top layer were now rotated by a small angle from the [110] direction, and there was no quasi-hexagonal arrangement of atoms. Thus even though field-ion images of these surfaces were consistent with models proposed from studies using low-energy electron diffraction and other macroscopic techniques, there were a few significant differences in the detailed atomic arrangements.

Direct Observation of Atomic Structures in the Surface Reconstruction of Ir and Pt (001), (110), and (131) Surfaces. Q.J.Gao, T.T.Tsong: Physical Review B, 1987, 36, 2547-56