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|Type:||Artigo de periódico|
|Title:||Low Energy Electron Diffraction Structure Determination Of The Ni(1 1 0)c(2 × 2)-cn Surface Phase|
|Abstract:||The structure of the Ni(1 1 0)c(2 × 2)-CN surface phase has been determined by quantitative low energy electron diffraction (LEED). Contrary to earlier suggestions that relatively intense fractional order LEED beams imply that adsorbate-induced Ni surface reconstruction occurs, the results confirm previous findings by scanned-energy mode photoelectron diffraction and medium energy ion scattering that no significant reconstruction occurs. The C-N axis is oriented along an open-packed 〈1 0 0〉 azimuth, with the molecule lying above a second layer Ni atom; the intramolecular axis is tilted by 23.7 ± 4.5° relative to the surface plane. The adsorption does lead to a substantial (9 ± 4%) outward relaxation of the outermost Ni layer spacing and small distortions of the outermost layers of the Ni substrate. © 2002 Elsevier Science B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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