Research & Teaching Faculty

Default Header Image

STRUCTURAL DETAILS FOR THE CU(110)-C(6X2)-O SURFACE DETERMINED BY TENSOR LEED

TitleSTRUCTURAL DETAILS FOR THE CU(110)-C(6X2)-O SURFACE DETERMINED BY TENSOR LEED
Publication TypeJournal Article
Year of Publication1995
AuthorsLiu, W, Wong, KC, Mitchell, KAR
JournalSurface Science
Volume339
Pagination151-158
Date PublishedSep
Type of ArticleArticle
ISBN Number0039-6028
Keywordscopper, CRYSTAL SURFACES, CU, CU(110), ENERGY-ELECTRON-DIFFRACTION, LOW ENERGY ELECTION DIFFRACTION (LEED), LOW INDEX SINGLE, OXYGEN, OXYGEN-CHEMISORPTION, SURFACE RELAXATION AND RECONSTRUCTION, X-RAY-DIFFRACTION
Abstract

A tenser LEED analysis has been made for the Cu(110)-c(6 x 2)-O surface structure using intensity versus energy curves measured for 13 diffracted beams at normal incidence. A good level of correspondence between experimental and calculated intensities has been reached (R(p) = 0.271) for the model type (2/3 monolayer coverage of O) proposed for this surface by Feidenhans’l et al. This analysis provides direct information on the structural details, and it is indicated that they support the view that the driving force for this structure relates to sufficient O being incorporated in order to stabilize the surface as a modified (211) plane of bulk Cu2O. This structure is composed of double-stranded chains built from 12-membered rings formed by alternating O and Cu atoms. The chains are flattened on the surface, and alternating chains are laterally displaced by half a repeat unit compared with the bulk (211) plane. However, the three-atom O-Cu-O fragments essentially maintain their bulk form in the surface structure. The average O-Cu bond length in Cu(110)-c(6 X 2)-O is indicated to equal 1.90 Angstrom, in exact agreement with the values determined for the half monolayer structures formed by O on Cu(110) and Cu(100).

URL<Go to ISI>://A1995RV21300017