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Journal ArticleDOI

Defects on surfaces

01 Mar 1988-Bulletin of Materials Science (Springer India)-Vol. 10, Iss: 1, pp 161-172
TL;DR: A brief review of various types of defects on surfaces and their role in surface reactions is presented in this article, with particular emphasis on defects like steps/kinks and additives (promoters and poison).
Abstract: A brief review of various types of defects on surfaces and their role in surface reactions is presented. Particular emphasis is given on defects like steps/kinks and additives (promoters and poison).
Citations
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Journal ArticleDOI
TL;DR: In this paper, a density functional theory study has been carried out to investigate the hydration kinetics of periclase (MgO) through the interaction between water and pericloase (0, 0, 1) and (1, 1, 1), 1) surfaces.

4 citations

References
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Journal ArticleDOI
TL;DR: The adsorption and decomposition of NH 3 on clean and nitrogen covered Fe(111) and Fe(100) surfaces has been studied by means of UPS, AES, LEED, thermal desorption, and work function measurements as mentioned in this paper.

145 citations

Journal ArticleDOI
TL;DR: In this article, the first interlayer spacing of Ni(001) is contracted if the surface is clean, but expanded if it is covered by half a monolayer of oxygen.
Abstract: Ion shadowing and blocking measurements show that the first interlayer spacing of Ni(001) is contracted if the surface is clean, but expanded if it is covered by half a monolayer of oxygen. The thermal vibration amplitude of surface atoms is strongly enhanced. A simple tight-binding model relates the change in first interlayer spacing to a change in surface force constants, and explains the recently measured surface phonon dispersion curves.

100 citations

Journal ArticleDOI
TL;DR: In this article, the results from a low-energy electron diffraction (LEED) analysis of the Al(110) surface are presented and discussed, showing that a multilayer relaxation exists in the Al110 surface region such that the spacing between layers 1 and 2 has a relative change of -8.5% from the bulk value.
Abstract: Results from a low-energy electron diffraction (LEED) analysis of the Al(110) surface are presented and discussed. The results indicate that a multilayer relaxation exists in the Al(110) surface region such that the spacing between layers 1 and 2 has a relative change ..delta..d/sub 12/ of -8.5% from the bulk value, while ..delta..d/sub 23/ = +5.5%, ..delta..d/sub 34/ = +2.2%, and ..delta..d/sub 45/ = +1.6%. When these results are compared with those from an independent LEED analysis, excellent agreement is found between results for ..delta..d/sub 12/ and ..delta..d/sub 23/. However, a disagreement is found to exist between the results of the two analyses for ..delta..d/sub 34/. When this disagreement is considered in relationship to predictions of a recent theory for the multilayer relaxation of metallic surfaces, the importance of future work to resolve this ..delta..d/sub 34/ discrepancy is apparent.

99 citations