Open AccessRevisit of XPS Studies of Supersonic O2 Molecular Adsorption on Cu(111): Copper Oxides
Author(s) -
Koki Hayashida,
Yasutaka Tsuda,
Takashi Yamada,
Akitaka Yoshigoe,
Michio Okada
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c04663
Subject(s) - x ray photoelectron spectroscopy , copper , oxide , spectral line , electronic structure , photoemission spectroscopy , copper oxide , adsorption , materials science , characterization (materials science) , electron spectroscopy , chemistry , analytical chemistry (journal) , crystallography , computational chemistry , nuclear magnetic resonance , nanotechnology , physics , chromatography , astronomy , metallurgy
We report the X-ray photoemission spectroscopy (XPS) characterization of the bulk Cu 2 O(111) surface and "8" and "29" oxide structures on Cu(111) prepared using a 0.5 eV O 2 supersonic molecular beam. We propose a new structural model for the "8" oxide structure and also confirm the previously proposed model for the "29" oxide structure on Cu(111), based on the O 1s XPS spectra. The detection angle dependence of the O 1s spectra supports that the nanopyramidal model is more preferable for the (√3 × √3) R 30° Cu 2 O(111). We also report electronic excitations that O 1s electrons suffer.