Oxidation of Anatase TiO2(001) Surface Using Supersonic Seeded Oxygen Molecular Beam

Daiki Katsube; Shinya Ohno; Shuhei Takayanagi; Shoki Ojima; Motoyasu Maeda; Naoki Origuchi; Arata Ogawa; Natsuki Ikeda; Yoshihide Aoyagi; Yuito Kabutoya; Kim Kyungmin; Hou Linfeng; Li Fengxuan; Yasutaka Tsuda; Hikaru Yoshida; Shizuka Nishi; Tetsuya Sakamoto; Eiichi Inami; Akitaka Yoshigoe; Masayuki Abe

doi:10.1021/acs.langmuir.1c01752

Oxidation of Anatase TiO₂(001) Surface Using Supersonic Seeded Oxygen Molecular Beam

Langmuir. 2021 Oct 26;37(42):12313-12317. doi: 10.1021/acs.langmuir.1c01752. Epub 2021 Oct 13.

Authors

Daiki Katsube¹, Shinya Ohno², Shuhei Takayanagi², Shoki Ojima³, Motoyasu Maeda³, Naoki Origuchi³, Arata Ogawa², Natsuki Ikeda², Yoshihide Aoyagi², Yuito Kabutoya¹, Kim Kyungmin³, Hou Linfeng³, Li Fengxuan³, Yasutaka Tsuda⁴, Hikaru Yoshida⁴, Shizuka Nishi⁴, Tetsuya Sakamoto⁴, Eiichi Inami⁵, Akitaka Yoshigoe⁴, Masayuki Abe³

Affiliations

¹ Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology, 1603-1 Kamitomiokamachi, Nagaoka, Niigata 940-2188, Japan.
² Department of Physic, Faculty of Engineerings, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
³ Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
⁴ Materials Sciences Research Center, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.
⁵ School of Systems Engineering, Kochi University of Technology, 185 Miyanokuchi, Tosayamada, Kami, Kochi 782-8502, Japan.

PMID: 34644079
DOI: 10.1021/acs.langmuir.1c01752

Abstract

We investigated the oxidation of oxygen vacancies at the surface of anatase TiO₂(001) using a supersonic seeded molecular beam (SSMB) of oxygen. The oxygen vacancies at the top surface and subsurface could be eliminated by the supply of oxygen using an SSMB. Oxygen vacancies are present on the surface of anatase TiO₂(001) when it is untreated before transfer to a vacuum chamber. These vacancies, which are stable in the as-grown condition, could also be effectively eliminated by using the oxygen SSMB.