THE STUDY OF SURFACE SEGREGATION, STRUCTURE, AND VALENCE BAND DENSITY OF STATES OFPt3Ni(100), (110), AND (111) CRYSTALS

B. S. Mun, M. Watanabe, M. Rossi, V. Stamenkovic, N. M. Markovic and P. N. Ross
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B. S. Mun: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA;
M. Watanabe: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA;
M. Rossi: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
V. Stamenkovic: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
N. M. Markovic: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
P. N. Ross: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

Surface Review and Letters (SRL), 2006, vol. 13, issue 05, 697-702

Abstract: The surface segregation, structure, and valence band density of states ofPt3Ni(100), (110), and (111) single crystals are characterized with low energy ion scattering (LEIS), low energy electron diffraction (LEED), and ultraviolet photoemission spectroscopy (UPS). The results of LEIS clearly reveal the complete surface segregation ofPtto the top layer on all crystal alloys. LEED indicates the (5 × 1) surface reconstruction on thePt3Ni(100), while (110) and (111) surfaces show (2 × 1) and (1 × 1) patterns, respectively, identical toPtsingle crystals. The valence bands density of states onPt3Nialloys are compared to those ofPtsingle crystals via UPS measurements.

Keywords: Pt3Ni; surface segregation; UPS; LEED; LEIS (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0218625X06008682

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