Passivation of Si (111) surfaces by ordered metal layers |
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| Authors: | A Cros F Houzay GM Guichar R Pinchaux |
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| Institution: | ERA-CNRS 373, Faculté de Marseille-Luminy, Case 901, F-13288 Marseille Cedex 9, France;CNET, Grenoble, France;LURE, Bât. 209c, Université Paris-Sud, F-91405 Orsay Cedex, France |
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| Abstract: | The properties of √3 × √3 ordered gold and silver monolayers on a Si(111) substrate have been investigated by Auger, low energy electron diffraction and photo-emission analysis. It has been found that oxygen adsorption on these surfaces is considerably weaker than on clean Si surfaces. This new result clearly emphasizes the correlation between the oxidation properties of Si atoms and their local environment. A comparison is made with previous results concerning Au-Si amorphous metallic alloys where gold atoms act as a catalyst for the oxidation. |
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