Subsurface formation of oxygen on a Ru(0001) surface

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

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)408-412
Number of pages5
JournalJournal of the Korean Physical Society
Volume42
Issue number3
Publication statusPublished - 2003 Mar 1

Keywords

  • Adsorption
  • Oxygen
  • Ru
  • Subsurface
  • Thermal desorption spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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