Actively controlled oxidation of Cu{100} with hyperthermal O2 molecular beam
Actively controlled oxidation of Cu{100} with hyperthermal O2 molecular beam
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DOI：
10.1063/1.1615961
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发表时间：
2003-10-08
影响因子：
4.4
通讯作者：
Teraoka, Y
中科院分区：
文献类型：
--
作者：
Okada, M;Moritani, K;Teraoka, Y
利用同步辐射光源和X射线光电子能谱研究了超热氧分子束(HOMB)对铜{100}的氧化反应。HOMB的氧化效率高于常温O-2。氧覆盖(Theta)大于或等于0.5ML的进一步氧化即使在2.3 eV-HOMB照射下也会发生相当低的效率。我们发现，铜的这种缓慢氧化对应于Cu2O形成的初始阶段，可以用碰撞诱导吸收机制解释。在一个简单的朗缪尔型吸附模型中，解离吸附在小于或等于0.5ML时的动力学可用一级动力学很好地描述。(C)2003年美国物理研究所。
The oxidation of Cu{100} with a hyperthermal O-2 molecular beam (HOMB) was investigated using x-ray photoemission spectroscopy in conjunction with a synchrotron light source. The efficiency of oxidation with HOMB is higher than that with ambient thermal O-2. Further oxidation under oxygen coverage (Theta)greater than or equal to0.5 ML occurs rather inefficiently even for the 2.3-eV-HOMB irradiation. We found that such slow oxidation of Cu corresponding to the initial stage of the Cu2O formation can be interpreted in terms of a collision-induced-absorption mechanism. The kinetics of the dissociative adsorption under Thetaless than or equal to0.5 ML is well described using the first-order kinetics in a simple Langmuir-type adsorption model. (C) 2003 American Institute of Physics.