Oxygen chemisorption on a stepped Ru (∼001) crystal

S. L. Parrott; G. Praline; B. E. Koel; J. M. White; T. N. Taylor

doi:10.1063/1.438782

Oxygen chemisorption on a stepped Ru (∼001) crystal

S. L. Parrott, G. Praline, B. E. Koel, J. M. White, T. N. Taylor

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Abstract

The 300 K chemisorption of oxygen on a stepped Ru (∼001) single crystal [17(001)×(100)] gives 2×2 complete half-order, 1×2 complete or incomplete half-order, and 1×1 integral-order LEED patterns depending on oxygen exposure and sample annealing. The corresponding relative AES oxygen signals are 0.25, 0.50, and 1.0, respectively. Under certain surface conditions, the presence of the steps is seen to break the threefold degenerate growth habit of 1×2 domains. The 1×1 pattern forms at 300 K only after lengthy exposure at relatively high pressure (10^-5 Torr) and is stable to 600 K. Prolonged exposure gives rise to relative AES oxygen signals greater than unity suggesting penetration into the subsurface region.

Original language	English (US)
Pages (from-to)	3352-3354
Number of pages	3
Journal	The Journal of chemical physics
Volume	71
Issue number	8
DOIs	https://doi.org/10.1063/1.438782
State	Published - Jan 1 1979
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Oxygen chemisorption on a stepped Ru (∼001) crystal",

abstract = "The 300 K chemisorption of oxygen on a stepped Ru (∼001) single crystal [17(001)×(100)] gives 2×2 complete half-order, 1×2 complete or incomplete half-order, and 1×1 integral-order LEED patterns depending on oxygen exposure and sample annealing. The corresponding relative AES oxygen signals are 0.25, 0.50, and 1.0, respectively. Under certain surface conditions, the presence of the steps is seen to break the threefold degenerate growth habit of 1×2 domains. The 1×1 pattern forms at 300 K only after lengthy exposure at relatively high pressure (10-5 Torr) and is stable to 600 K. Prolonged exposure gives rise to relative AES oxygen signals greater than unity suggesting penetration into the subsurface region.",

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T1 - Oxygen chemisorption on a stepped Ru (∼001) crystal

AU - Parrott, S. L.

AU - Praline, G.

AU - Koel, B. E.

AU - White, J. M.

AU - Taylor, T. N.

PY - 1979/1/1

Y1 - 1979/1/1

N2 - The 300 K chemisorption of oxygen on a stepped Ru (∼001) single crystal [17(001)×(100)] gives 2×2 complete half-order, 1×2 complete or incomplete half-order, and 1×1 integral-order LEED patterns depending on oxygen exposure and sample annealing. The corresponding relative AES oxygen signals are 0.25, 0.50, and 1.0, respectively. Under certain surface conditions, the presence of the steps is seen to break the threefold degenerate growth habit of 1×2 domains. The 1×1 pattern forms at 300 K only after lengthy exposure at relatively high pressure (10-5 Torr) and is stable to 600 K. Prolonged exposure gives rise to relative AES oxygen signals greater than unity suggesting penetration into the subsurface region.

AB - The 300 K chemisorption of oxygen on a stepped Ru (∼001) single crystal [17(001)×(100)] gives 2×2 complete half-order, 1×2 complete or incomplete half-order, and 1×1 integral-order LEED patterns depending on oxygen exposure and sample annealing. The corresponding relative AES oxygen signals are 0.25, 0.50, and 1.0, respectively. Under certain surface conditions, the presence of the steps is seen to break the threefold degenerate growth habit of 1×2 domains. The 1×1 pattern forms at 300 K only after lengthy exposure at relatively high pressure (10-5 Torr) and is stable to 600 K. Prolonged exposure gives rise to relative AES oxygen signals greater than unity suggesting penetration into the subsurface region.

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Oxygen chemisorption on a stepped Ru (∼001) crystal

Abstract

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