Structure of Reconstructed Cu(100) Surface Induced by Dissociative Adsorption of Gaseous Oxygen |
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Authors: | Wei-dong Dou Han-jie Zhang |
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Institution: | 1.Department of Physics, Shaoxing University, Shaoxing 312000, China2.Department of Physics, Zhejiang University, Hangzhou 310027, China |
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Abstract: | The reconstructed structures of Cu(100) surface induced by O2 dissociative adsorption wereinvestigated by low energy electron diffraction and scanning tunneling microscopy. At lower oxygen coverage, it was found that two reconstructed structures, i.e. c(2×2)-O and (√2×2√2)R45°-O are coexistent. The domain size of the c(2×2)-O structure decreased with the increasing of O2 exposure. The reconstructed structure at very small coverage was also investigated and a “zigzag” structure was observed at this stage. The “zigzag” structure was identified as boundaries of local c(2×2) domains. It was found that the strip region shows much stronger molecule-substrate interaction than that of oxygen covered regions, making it a proper template for patterned organic films. The sequence of the thermal stability was found as zigzag structure>c(2×2)>(√2×2√2)R45°-O. |
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Keywords: | Surface reconstruction Chemical adsorption Scanning tunneling microscopy Structural phase transition |
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