Acta Phys. -Chim. Sin. ›› 1996, Vol. 12 ›› Issue (11): 1001-1005.doi: 10.3866/PKU.WHXB19961109

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Investigation of CO Adsorption on Cs/Ru(1010) Surface Using ARUPS

Li Hai-Yang,Bao Shi-Ning,Zhang Xun-Sheng,Fan Chao-Yang,Feng Xiao-Song,Xu Ya-Bo   

  1. Department of Physics,Zhejiang University,Hangzhou 310027
  • Received:1996-04-17 Revised:1996-06-03 Published:1996-11-15
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Abstract:

CO adsorption on Ru(100) and Cs/Ru(10O) surfaces has been investigated using ARUPS, at low temperature 150K. The 5σ+1π and 4σ levels of CO molecule were　found in angle-rcsolved UP spectra showing that CO is in molecular adsorption states on clean and Cs precovercd Ru(1010). The dependence of CO 4σ intensity on incident angle suggests that adsorbed CO stands upright on clean Ru(1010) surface; But adsorbed CO, with a short-range interaction with Cs atom [15], does not stand upright and tilts in <1210> azimuth on a Cs-precovered Ru(1010) surface.

Key words: Angle-resolved ultraviolet photoemission spectrum, CO adsorption, Cs/Ru(1010) surface, Tilt adsorption