Studies of acetylene and oxygen adsorption on silicon surfaces by low energy electron loss spectroscopy |
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| Authors: | Yip Wah Chung Wigbert Siekhaus G.A. Somorjai |
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| Affiliation: | 1. Materials and Molecular Research Division, Lawrence Berkeley Laboratory, USA;2. Department of Chemistry, University of California, Berkeley, California 94720, USA |
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| Abstract: | Acetylene and oxygen adsorption on disordered and ordered silicon crystal surfaces of (111) orientation were studied by low-energy electron loss spectroscopy (ELS). There are marked structure-dependent differences in the ELS spectra in the presence of these adsorbates. A model for the acetylene molecule orientation on the silicon (111) ordered surface is proposed to explain the experimental results. ELS data suggest that the electrons in the silicon-oxygen chemisorption bond are more tightly bound on the disordered than on the silicon (111) surface with a (7 X 7) surface structure. |
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