Subsurface formation of oxygen on a Ru(0001) surface

J. H. Kim; J. H. Lee; H. Kato; N. Horimoto; M. Kawai; Y. S. Lee

Subsurface formation of oxygen on a Ru(0001) surface

J. H. Kim, J. H. Lee, H. Kato, N. Horimoto, M. Kawai, Y. S. Lee

SCI - Chemistry

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

The formation of subsurface oxygen on a clean and sputtered Ru(0001) surface is studied using thermal desorption spectroscopy (TDS) and low energy electron diffraction (LEED). The oxygen was incorporated by exposing the surface to a partial oxygen pressure in the range of 10^-8 -10^-9 Torr. By monitoring the signal of recombinatively desorbed molecular oxygen as a function of sample temperature, we found that oxygen molecules penetrated into the subsurface region after saturating the adsorbed layer characterized by the p(2 × 2) LEED pattern indicative of 0.25 monolayers (1 ML = 1.58 × 10¹⁵ cm^-2). In contrast, the defects generated by Ar⁺ sputtering on the Ru surface appear at thermally more stable sites in high-temperature O₂ thermal desorption states.

Original language	English
Pages (from-to)	408-412
Number of pages	5
Journal	Journal of the Korean Physical Society
Volume	42
Issue number	3
Publication status	Published - 2003 Mar 1

Keywords

Adsorption
Oxygen
Ru
Subsurface
Thermal desorption spectroscopy

ASJC Scopus subject areas

Physics and Astronomy(all)

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Kim, J. H., Lee, J. H., Kato, H., Horimoto, N., Kawai, M., & Lee, Y. S. (2003). Subsurface formation of oxygen on a Ru(0001) surface. Journal of the Korean Physical Society, 42(3), 408-412.

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abstract = "The formation of subsurface oxygen on a clean and sputtered Ru(0001) surface is studied using thermal desorption spectroscopy (TDS) and low energy electron diffraction (LEED). The oxygen was incorporated by exposing the surface to a partial oxygen pressure in the range of 10-8 -10-9 Torr. By monitoring the signal of recombinatively desorbed molecular oxygen as a function of sample temperature, we found that oxygen molecules penetrated into the subsurface region after saturating the adsorbed layer characterized by the p(2 × 2) LEED pattern indicative of 0.25 monolayers (1 ML = 1.58 × 1015 cm-2). In contrast, the defects generated by Ar+ sputtering on the Ru surface appear at thermally more stable sites in high-temperature O2 thermal desorption states.",

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TY - JOUR

T1 - Subsurface formation of oxygen on a Ru(0001) surface

AU - Kim, J. H.

AU - Lee, J. H.

AU - Kato, H.

AU - Horimoto, N.

AU - Kawai, M.

AU - Lee, Y. S.

PY - 2003/3/1

Y1 - 2003/3/1

N2 - The formation of subsurface oxygen on a clean and sputtered Ru(0001) surface is studied using thermal desorption spectroscopy (TDS) and low energy electron diffraction (LEED). The oxygen was incorporated by exposing the surface to a partial oxygen pressure in the range of 10-8 -10-9 Torr. By monitoring the signal of recombinatively desorbed molecular oxygen as a function of sample temperature, we found that oxygen molecules penetrated into the subsurface region after saturating the adsorbed layer characterized by the p(2 × 2) LEED pattern indicative of 0.25 monolayers (1 ML = 1.58 × 1015 cm-2). In contrast, the defects generated by Ar+ sputtering on the Ru surface appear at thermally more stable sites in high-temperature O2 thermal desorption states.

AB - The formation of subsurface oxygen on a clean and sputtered Ru(0001) surface is studied using thermal desorption spectroscopy (TDS) and low energy electron diffraction (LEED). The oxygen was incorporated by exposing the surface to a partial oxygen pressure in the range of 10-8 -10-9 Torr. By monitoring the signal of recombinatively desorbed molecular oxygen as a function of sample temperature, we found that oxygen molecules penetrated into the subsurface region after saturating the adsorbed layer characterized by the p(2 × 2) LEED pattern indicative of 0.25 monolayers (1 ML = 1.58 × 1015 cm-2). In contrast, the defects generated by Ar+ sputtering on the Ru surface appear at thermally more stable sites in high-temperature O2 thermal desorption states.

KW - Adsorption

KW - Oxygen

KW - Ru

KW - Subsurface

KW - Thermal desorption spectroscopy

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