Molecular orientation change during adsorption of NO and N 2O on Ir(111) observed by real-time wavelength-dispersive x-ray absorption spectroscopy with polarization switching

Kenta Amemiya, Masako Sakamaki, Shuichi Nakamoto, Masaaki Yoshida, Kazuma Suzuki, Hiroshi Kondoh, Tsuneharu Koide, Kenji Ito, Kimichika Tsuchiya, Kentaro Harada, Hiroyuki Sasaki, Tomohiro Aoto, Tatsuro Shioya, Takashi Obina, Shigeru Yamamoto, Yukinori Kobayashi

研究成果: Article査読

2 被引用数 (Scopus)

抄録

The molecular orientation of NO and N 2O during adsorption on Ir(111) is observed by combining the wavelength-dispersive x-ray absorption spectroscopy with 1 Hz switching between the vertical and horizontal linear polarizations. It is revealed that NO adsorbs keeping its molecular axis at ∼ 20 ° from surface normal. In contrast, N 2O rapidly adsorbs up to 2/3 of the saturation coverage with an orientation angle of ∼ 35°, then turns to a slow adsorption phase with larger orientation angles, and gradually reaches its saturation with an average orientation angle of ∼ 45 °. Such a complicated behavior is interpreted by assuming different adsorption sites.

本文言語English
論文番号161601
ジャーナルApplied Physics Letters
101
16
DOI
出版ステータスPublished - 2012 10 15

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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