Vibrational spectroscopy of adsorbates on the (111) and (100) surfaces of lanthanum hexaboride

Thomas Yorisaki, Aashani Tillekaratne, Yukihiro Moriya, Chuhei Oshima, Shigeki Otani, Michael Trenary

研究成果: Chapter

抄録

Reflection absorption infrared spectroscopy has been used to study the adsorption of carbon monoxide, oxygen, and decaborane on the (100) and (111)adsorption of carbon monoxide, oxygen, and decaborane on the (100) and (111) surfaces of lanthanum hexaboride. Exposure of the surface at temperatures of 95 K and above to O2 produces atomic oxygen on the surface and yields vibrational peaks in good agreement with those observed previously with the technique of high resolution electron energy loss spectroscopy (HREELS). As in the previous HREELS studies, the peaks observed in response to oxygen adsorption are assigned to vibrations of the B6 octahedra that gain intensity due to a decrease in electronic screening of surface dipoles. In the case of CO, molecular adsorption occurs at 95 K and gives rise to a variety of C-O stretch peaks, depending on adsorption site.Decaborane adsorbs molecularly at 95 K and gives rise to intense peaks in the B-H stretch region that evolve with annealing temperature into a single peak at 2571cm-1 due to an unidentified surface intermediate possessing BH bonds.

本文言語English
ホスト出版物のタイトルNATO Science for Peace and Security Series B: Physics and Biophysics
ページ181-193
ページ数13
DOI
出版ステータスPublished - 2011

出版物シリーズ

名前NATO Science for Peace and Security Series B: Physics and Biophysics
ISSN(印刷版)18746500

ASJC Scopus subject areas

  • Biophysics
  • Biotechnology
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

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