Structure and composition of the NiPd(110) surface

被引：10

作者：

Derry, G. N. ^{[1
]}

Wan, R. ^{[2
]}

Krueger, E. ^{[1
]}

Waldt, J. ^{[3
]}

English, C. ^{[1
]}

机构：

[1] Loyola Coll, Dept Phys, Baltimore, MD 21210 USA

[2] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21228 USA

[3] Coll Notre Dame, Dept Comp Sci, Baltimore, MD 21210 USA

来源：

SURFACE SCIENCE | 2009年 / 603卷 / 14期

基金：

美国国家科学基金会;

关键词：

Low energy electron diffraction (LEED); Surface segregation; Surface structure; Low index single crystal surfaces; Nickel; Palladium; ENERGY-ELECTRON-DIFFRACTION; NI-PD ALLOYS; FACE-RELATED SEGREGATION; SINGLE-CRYSTAL ALLOYS; EMBEDDED-ATOM METHOD; PHOTOELECTRON DIFFRACTION; MULTILAYER RELAXATION; SANDWICH SEGREGATION; COMPOSITION PROFILE; TENSOR LEED;

D O I：

10.1016/j.susc.2009.04.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The NiPd(110) alloy surface was studied using low energy electron diffraction to measure the structure and composition of the first three atomic layers. The surface layer is highly enriched in Pd and has a significantly buckled structure. The second layer is also buckled, with displacements even larger than the surface layer. The second layer also exhibits intralayer segregation (chemical ordering), with alternate close-packed rows of atoms being Ni enriched and Pd enriched. The third layer has a structure and composition close to that of the bulk alloy. These results are compared with results for the other low index faces of NiPd, the extensive literature on NiPt alloy surfaces, and the growing body of theoretical literature for NiPd alloy surfaces. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：2193 / 2199

页数：7

共 56 条

[41] Strain-induced local surface chemical ordering observed by STM [J].