An investigation of the kinetics of structural changes during the early oxidation stages of a Ni(100) surface using low energy ion scattering (LEIS)

J. A. Van Den Berg, L. K. Verheij, D. G. Armour

Research output: Contribution to journalArticle

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Abstract

Low energy ion scattering has been used to investigate the early stages of the oxidation of a Ni(100) surface. This technique allows simultaneous study of the oxygen uptake in the surface and the development of surface structures. Bombardment induced surface damages was minimised by performing the experiments with low ion doses, while keeping the target at 200-300°C. The measured kinetics of the oxygen uptake are in good agreement with recent work, using different techniques. It is concluded that during the early chemisorption, a two stage process takes place: an initial oxygen adsorption during which the O atoms probably reside within the fourfold surface hollows, followed by a reconstruction process, caused by the combined action of at least two nearest neighbour O atoms, trapping mobile Ni adatoms, after which the O atoms stabilise at a site in or close to the reconstructed 〈001̄〉 row. Observed structural changes at higher exposures are compatible with a transition into a (3 × 1) structure and subsequently NiO, but cannot, as yet be positively identified.

Original languageEnglish
Pages (from-to)218-236
Number of pages19
JournalSurface Science
Volume91
Issue number1
DOIs
Publication statusPublished - 1 Jan 1980
Externally publishedYes

Fingerprint

ion scattering
Scattering
Ions
Oxidation
oxidation
Kinetics
kinetics
Oxygen
Atoms
oxygen
Adatoms
energy
atoms
Chemisorption
Surface structure
chemisorption
adatoms
bombardment
hollow
Adsorption

Cite this

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An investigation of the kinetics of structural changes during the early oxidation stages of a Ni(100) surface using low energy ion scattering (LEIS). / Van Den Berg, J. A.; Verheij, L. K.; Armour, D. G.

In: Surface Science, Vol. 91, No. 1, 01.01.1980, p. 218-236.

Research output: Contribution to journalArticle

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