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E. Vesselli and M. Peressi, Chapter 8 – Nanoscale Control of Metal Clusters on Templating Supports, in Studies in Surface Science and Catalysis, ed. P. Fornasiero and M. Cargnello, Elsevier, 2017. pp. 285–315 Search PubMed. A. Beniya, N. Isomura, H. Hirata and Y. Watanabe, Lateral displacement in soft-landing process and electronic properties of size-selected Pt7 clusters on the aluminum oxide film on NiAl(110), Chem. Phys. Lett., 2013, 576, 49–54 CrossRef CAS. Bampoulis, P.; Zhang, L.; Safaei, A.; Van Gastel, R.; Poelsema, B.; Zandvliet, H. J. W. Germanene termination of Ge 2Pt crystals on Ge(110). J. Phys.: Condens. Matter 2014, 26, 442001.
E. W. A. Young, J. C. Rivière and L. S. Welch, Investigation by X-ray photoelectron spectroscopy of the transient oxidation of NiAl, Appl. Surf. Sci., 1987, 28(1), 71–84 CrossRef CAS. The respective diffraction spots of a (2√3 × 2√3)R30° and a (4√3 × 4√3)R30° unit cell are indicated by red and white circles in the LEED pattern shown beside the hard sphere model of Fig. 6. They match very well the observed diffraction spots of the low temperature bilayer oxide which supports the suggested structure model. The hard sphere model of Fig. 6 is also supported by the fact that both, the low temperature bilayer and the single layer oxide form along straight aligned growth fronts while the high temperature (√67 × √67)R12.2° double layer oxide phase grows along kinked edges as expected for a rotated oxide layer.W. G. Moffat, The handbook of binary phase diagrams, Genium Publishing Corp, New York, 1976 Search PubMed.
Gou, J.; Zhong, Q.; Sheng, S. X.; Li, W. B.; Cheng, P.; Li, H.; Chen, L.; Wu, K. H. Strained monolayer germanene with 1×1 lattice on Sb(111). 2D Mater. 2016, 3, 045005. J. A. Kelber, Alumina surfaces and interfaces under non-ultrahigh vacuum conditions, Surf. Sci. Rep., 2007, 62(7), 271–303 CrossRef CAS. Derivaz, M.; Dentel, D.; Stephan, R.; Hanf, M. C; Mehdaoui, A.; Sonnet, P.; Pirri, C. Continuous germanene layer on Al(111). Nano Lett. 2015, 15, 2510–2516.R. Franchy, J. Masuch and P. Gassmann, The oxidation of the NiAl(111) surface, Appl. Surf. Sci., 1996, 93(4), 317–327 CrossRef CAS. A. M. Venezia and C. M. Loxton, Low pressure oxidation of Ni 3Al alloys at elevated temperatures as studied by X-ray photoelectron spectroscopy and Auger spectroscopy, Surf. Sci., 1988, 194(1), 136–148 CrossRef CAS. Cohen, A. J.; Mori-Sánchez, P.; Yang, W. T. Insights into current limitations of density functional theory. Science 2008, 321, 792–794. In a recent publication, we could show that the damping of the Ni(LMM) signal during the formation of the (7 × 7) oxide phase is compatible with the formation of a single oxide layer. 44 Assuming that the second layer of the low temperature bilayer oxide contains the same amount of Al and O atoms as the first layer, we can compute the expected increase of the O(KLL)/Ni(LMM) intensity ratio obtained from the bilayer surface oxide and compare it to the respective value obtained from the (7 × 7) single layer oxide phase. Within the error bars of this calculation (see ESI-e †), the expected increase agrees well with the experimentally observed increase of 1.89.