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- W2003190736 abstract "We present results of the surface composition of the topmost layer of three low index planes of PtxNi1−x single crystal alloys: Pt10Ni90(100), Pt25Ni75(111) and Pt50N50(110). The alloys were investigated by ion scattering spectroscopy (ISS). We observed Pt enrichment of the surface layers caused by preferential sputtering. After exposing the surfaces to oxygen, adsorbate induced segregation of Ni was measured. Annealing the sputtered alloys results in a site specific change in surface composition. We found Pt enrichment for the (111) surface and Ni enrichment for the (110) surface. The surface of Pt10Ni90(100) showed a Pt concentration close to the bulk composition. Work functions were determined by ultraviolet photoelectron spectroscopy (UPS). The UPS results support the ISS results of the surface composition. The results of thermodynamic calculations are discussed with respect to the experimental results on surface segregation." @default.
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- W2003190736 date "1992-02-01" @default.
- W2003190736 modified "2023-10-01" @default.
- W2003190736 title "Surface composition of PtxNi1−x single crystal alloys" @default.
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- W2003190736 doi "https://doi.org/10.1016/0168-583x(92)95444-v" @default.
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