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

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

^*Corresponding author for this work

Waseda University

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

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 language	English
Pages (from-to)	133-142
Number of pages	10
Journal	Surface Science
Volume	348
Issue number	1-2
Publication status	Published - 1996 Mar 1

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

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title = "Oxygen adsorption sites on the PrB6(100) and LaB6(100) surfaces",

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.",

keywords = "Bondes, Electron energy loss spectroscopy, Low energy electron diffraction (LEED), Low index single crystal surfaces, Oxidation, Phonons",

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

year = "1996",

month = mar,

day = "1",

language = "English",

volume = "348",

pages = "133--142",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

number = "1-2",

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TY - JOUR

T1 - Oxygen adsorption sites on the PrB6(100) and LaB6(100) surfaces

AU - Yamamoto, N.

AU - Rokuta, E.

AU - Hasegawa, Y.

AU - Nagao, T.

AU - Trenary, M.

AU - Oshima, C.

AU - Otani, S.

PY - 1996/3/1

Y1 - 1996/3/1

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.

KW - Bondes

KW - Electron energy loss spectroscopy

KW - Low energy electron diffraction (LEED)

KW - Low index single crystal surfaces

KW - Oxidation

KW - Phonons

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M3 - Article

AN - SCOPUS:0030110248

SN - 0039-6028

VL - 348

SP - 133

EP - 142

JO - Surface Science

JF - Surface Science

IS - 1-2

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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