Oxygen adsorption sites on the PrB6(100) and LaB6(100) surfaces

N. Yamamoto, E. Rokuta, Y. Hasegawa, T. Nagao, M. Trenary, C. Oshima, S. Otani

Research output: Contribution to journalArticle

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Abstract

The adsorption of oxygen on the LaB6(100) and PrB6(100) surfaces has been studied with low energy electron diffraction (LEED) and high resolution electron energy loss spectroscopy (HREELS). Room temperature adsorption of oxygen gives a diffuse c(2 × 2) LEED pattern and several vibrational loss features with the most intense peak at 35 meV. Upon annealing to 600°C both the c(2 × 2) LEED pattern and the HREELS loss features become much sharper. Annealing to 700°C produces a sharp (2 × 1) LEED pattern and strong changes in the HREEL spectrum including a large decrease in intensity of the 35 meV peak. The work function of the 2 × 1 structure is 0.9 eV lower than that of the c(2 × 2) structure while Auger measurements show that the oxygen coverage is the same. The results are discussed in terms of possible oxygen adsorption sites.

Original languageEnglish
Pages (from-to)133-142
Number of pages10
JournalSurface Science
Volume348
Issue number1-2
Publication statusPublished - 1996 Mar 1

Fingerprint

Low energy electron diffraction
electron diffraction
Diffraction patterns
Oxygen
Adsorption
adsorption
diffraction patterns
Electron energy loss spectroscopy
oxygen
energy dissipation
Annealing
electron energy
annealing
energy
high resolution
spectroscopy
room temperature
Temperature

Keywords

  • Bondes
  • Electron energy loss spectroscopy
  • Low energy electron diffraction (LEED)
  • Low index single crystal surfaces
  • Oxidation
  • Phonons

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Yamamoto, N., Rokuta, E., Hasegawa, Y., Nagao, T., Trenary, M., Oshima, C., & Otani, S. (1996). Oxygen adsorption sites on the PrB6(100) and LaB6(100) surfaces. Surface Science, 348(1-2), 133-142.

Oxygen adsorption sites on the PrB6(100) and LaB6(100) surfaces. / Yamamoto, N.; Rokuta, E.; Hasegawa, Y.; Nagao, T.; Trenary, M.; Oshima, C.; Otani, S.

In: Surface Science, Vol. 348, No. 1-2, 01.03.1996, p. 133-142.

Research output: Contribution to journalArticle

Yamamoto, N, Rokuta, E, Hasegawa, Y, Nagao, T, Trenary, M, Oshima, C & Otani, S 1996, 'Oxygen adsorption sites on the PrB6(100) and LaB6(100) surfaces', Surface Science, vol. 348, no. 1-2, pp. 133-142.
Yamamoto N, Rokuta E, Hasegawa Y, Nagao T, Trenary M, Oshima C et al. Oxygen adsorption sites on the PrB6(100) and LaB6(100) surfaces. Surface Science. 1996 Mar 1;348(1-2):133-142.
Yamamoto, N. ; Rokuta, E. ; Hasegawa, Y. ; Nagao, T. ; Trenary, M. ; Oshima, C. ; Otani, S. / Oxygen adsorption sites on the PrB6(100) and LaB6(100) surfaces. In: Surface Science. 1996 ; Vol. 348, No. 1-2. pp. 133-142.
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AU - Rokuta, E.

AU - Hasegawa, Y.

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AU - Trenary, M.

AU - Oshima, C.

AU - Otani, S.

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N2 - The adsorption of oxygen on the LaB6(100) and PrB6(100) surfaces has been studied with low energy electron diffraction (LEED) and high resolution electron energy loss spectroscopy (HREELS). Room temperature adsorption of oxygen gives a diffuse c(2 × 2) LEED pattern and several vibrational loss features with the most intense peak at 35 meV. Upon annealing to 600°C both the c(2 × 2) LEED pattern and the HREELS loss features become much sharper. Annealing to 700°C produces a sharp (2 × 1) LEED pattern and strong changes in the HREEL spectrum including a large decrease in intensity of the 35 meV peak. The work function of the 2 × 1 structure is 0.9 eV lower than that of the c(2 × 2) structure while Auger measurements show that the oxygen coverage is the same. The results are discussed in terms of possible oxygen adsorption sites.

AB - The adsorption of oxygen on the LaB6(100) and PrB6(100) surfaces has been studied with low energy electron diffraction (LEED) and high resolution electron energy loss spectroscopy (HREELS). Room temperature adsorption of oxygen gives a diffuse c(2 × 2) LEED pattern and several vibrational loss features with the most intense peak at 35 meV. Upon annealing to 600°C both the c(2 × 2) LEED pattern and the HREELS loss features become much sharper. Annealing to 700°C produces a sharp (2 × 1) LEED pattern and strong changes in the HREEL spectrum including a large decrease in intensity of the 35 meV peak. The work function of the 2 × 1 structure is 0.9 eV lower than that of the c(2 × 2) structure while Auger measurements show that the oxygen coverage is the same. The results are discussed in terms of possible oxygen adsorption sites.

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