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SURFACE-COMPOSITION OF PTXNI1-X SINGLE-CRYSTAL ALLOYS

被引：16
作者：
WEIGAND, P
NOVACEK, P
VANHUSEN, G
NEIDHART, T
MEZEY, LZ
HOFER, W
VARGA, P
机构：
[1] Institut für Allgemeine Physik, TU Wien, A-1040 Vienna
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1992年 / 64卷 / 1-4期
关键词：
D O I：
10.1016/0168-583X(92)95444-V
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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 Pt50Ni50(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.
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页码：93 / 97
页数：5
相关论文
共 17 条
[1]   PT10NI90(111) SINGLE-CRYSTAL ALLOY - DETERMINATION OF THE SURFACE-COMPOSITION BY AES, XPS AND ISS [J].
BERTOLINI, JC ;
MASSARDIER, J ;
DELICHERE, P ;
TARDY, B ;
IMELIK, B ;
JUGNET, Y ;
DUC, TM ;
DETEMMERMAN, L ;
CREEMERS, C ;
VANHOVE, H ;
NEYENS, A .
SURFACE SCIENCE, 1982, 119 (01) :95-106
[2]   THE KINETICS AND MECHANISM OF THE INTERACTION OF OXYGEN WITH NI(100) [J].
BRUNDLE, CR ;
HOPSTER, H .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY, 1981, 18 (02) :663-664
[3]  
DECKERS S, 1990, THESIS U UTRECHT NET
[4]   EXPERIMENTAL-DETERMINATION OF EQUILIBRIUM SURFACE SEGREGATION IN PT-NI SINGLE-CRYSTAL ALLOYS [J].
DETEMMERMAN, L ;
CREEMERS, C ;
VANHOVE, H ;
NEYENS, A ;
BERTOLINI, JC ;
MASSARDIER, J .
SURFACE SCIENCE, 1986, 178 (1-3) :888-896
[5]   SURFACE-SANDWICH SEGREGATION AND MULTILAYER RELAXATION ON PT0.5NI0.5(110) MEASURED BY LOW-ENERGY ELECTRON-DIFFRACTION - AN OBSERVATION OF FACE-RELATED SEGREGATION REVERSAL [J].
GAUTHIER, Y ;
BAUDOING, R ;
LUNDBERG, M ;
RUNDGREN, J .
PHYSICAL REVIEW B, 1987, 35 (15) :7867-7878
[6]   STRUCTURE AND COMPOSITION OF PT10NI90(100) - A LOW-ENERGY ELECTRON-DIFFRACTION STUDY [J].
GAUTHIER, Y ;
HOFFMANN, W ;
WUTTIG, M .
SURFACE SCIENCE, 1990, 233 (03) :239-247
[7]   PTXNI1-X(111) ALLOY SURFACES - STRUCTURE AND COMPOSITION IN RELATION TO SOME CATALYTIC PROPERTIES [J].
GAUTHIER, Y ;
BAUDOING, R ;
JOLY, Y ;
RUNDGREN, J ;
BERTOLINI, JC ;
MASSARDIER, J .
SURFACE SCIENCE, 1985, 162 (1-3) :342-347
[8]   INTERACTION OF O-2 WITH PT(100) .1. EQUILIBRIUM MEASUREMENTS [J].
GRIFFITHS, K ;
JACKMAN, TE ;
DAVIES, JA ;
NORTON, PR .
SURFACE SCIENCE, 1984, 138 (01) :113-124
[9]   CHEMISORPTION AND OXIDE FORMATION ON METALS - OXYGEN-NICKEL REACTION [J].
HOLLOWAY, PH .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY, 1981, 18 (02) :653-659
[10]   X-RAY PHOTOELECTRON-SPECTROSCOPY OF OXYGEN-ADSORPTION ON CLEAN NI(100) SURFACES [J].
KRISHNAN, NG ;
DELGASS, WN ;
ROBERTSON, WD .
SURFACE SCIENCE, 1976, 57 (01) :1-11
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