Abstract
Small barium-oxide clusters Ba m O + n are studied by mass spectrometry and x-ray absorption spectroscopy (XAS) to discuss stability of the clusters and oxidation state of constituent atoms. It is found that clusters with bulk composition, n = m, are stable, which can accommodate one or two excess oxygen atoms additionally as manifested by n = m + 1 and m + 2 species in the mass spectrum. XAS spectra of Ba 2 O + 2 and Ba 2 O + 3 reveal that the oxidation state of barium atoms stays at +2 (the bulk BaO value) even after binding excess oxygen, whereas spectral features originating from oxygen exhibit composition dependence. The present finding suggests that stoichiometric small barium-oxide clusters bind lessnegatively-charged oxygen atoms without change in the charge state of barium.
| Original language | English |
|---|---|
| Article number | 134003 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 31 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - Feb 4 2019 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
Cite this
Charge-state analysis of small barium-oxide clusters by x-ray absorption spectroscopy. / Hayakawa, Tetsuichiro; Arakawa, Masashi; Ando, Kota; Kiyomura, Yuya; Kawano, Tomoki; Terasaki, Akira.
In: Journal of Physics Condensed Matter, Vol. 31, No. 13, 134003, 04.02.2019.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Charge-state analysis of small barium-oxide clusters by x-ray absorption spectroscopy
AU - Hayakawa, Tetsuichiro
AU - Arakawa, Masashi
AU - Ando, Kota
AU - Kiyomura, Yuya
AU - Kawano, Tomoki
AU - Terasaki, Akira
PY - 2019/2/4
Y1 - 2019/2/4
N2 - Small barium-oxide clusters Ba m O + n are studied by mass spectrometry and x-ray absorption spectroscopy (XAS) to discuss stability of the clusters and oxidation state of constituent atoms. It is found that clusters with bulk composition, n = m, are stable, which can accommodate one or two excess oxygen atoms additionally as manifested by n = m + 1 and m + 2 species in the mass spectrum. XAS spectra of Ba 2 O + 2 and Ba 2 O + 3 reveal that the oxidation state of barium atoms stays at +2 (the bulk BaO value) even after binding excess oxygen, whereas spectral features originating from oxygen exhibit composition dependence. The present finding suggests that stoichiometric small barium-oxide clusters bind lessnegatively-charged oxygen atoms without change in the charge state of barium.
AB - Small barium-oxide clusters Ba m O + n are studied by mass spectrometry and x-ray absorption spectroscopy (XAS) to discuss stability of the clusters and oxidation state of constituent atoms. It is found that clusters with bulk composition, n = m, are stable, which can accommodate one or two excess oxygen atoms additionally as manifested by n = m + 1 and m + 2 species in the mass spectrum. XAS spectra of Ba 2 O + 2 and Ba 2 O + 3 reveal that the oxidation state of barium atoms stays at +2 (the bulk BaO value) even after binding excess oxygen, whereas spectral features originating from oxygen exhibit composition dependence. The present finding suggests that stoichiometric small barium-oxide clusters bind lessnegatively-charged oxygen atoms without change in the charge state of barium.
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U2 - 10.1088/1361-648X/aafe18
DO - 10.1088/1361-648X/aafe18
M3 - Article
VL - 31
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 13
M1 - 134003
ER -