文献类型：期刊文献

中文题名：化学吸附氧诱导Cu（100）表面重构．

英文题名：Structure of Reconstructed Cu（100） Surface Induced by Dissociative Adsorption of Gaseous Oxygen

作者：窦卫东[1];张寒洁[2]

机构：[1]绍兴文理学院物理系,绍兴312000;[2]浙江大学物理系,杭州310027

年份：2010

卷号：23

期号：1

起止页码：18

中文期刊名：化学物理学报（英文）

外文期刊名：Chinese Journal of Chemical Physics

收录：CSTPCD、、Scopus、CSCD2011_2012、CSCD

基金：ACKNOWLEDGMENT This work was supported by the National Natural Science Foundation of China （No.60506019）.

语种：中文

中文关键词：结构改造;解离吸附;表面氧;扫描隧道显微镜;诱导;气态;低能电子衍射;铜

外文关键词：Surface reconstruction, Chemical adsorption, Scanning tunneling microscopy,Structural phase transition

中文摘要：用低能电子衍射（LEED）和扫描隧道显微镜技术研究了氧气在Cu（100）表面化学吸附所形成的表面重构结构．在低覆盖度下，实验上观察到了两个有序重构的混合相，分别为c（2×2）O重构和（√2×2√2）R45°-O重构．在氧原子的覆盖度逐渐增加的过程中，c（2×2）O重构区域的面积逐渐减小．在初始氧化阶段，实验上观察到了呈条状的“锯齿”形的重构结构，这些锯齿形的结构是由相邻的局域化的c（2×2）区域的边界区域（Cu）构成的．STM实验发现，相对于其他重构区域，这些锯齿形的重构区域与有机分子之间存在更加强烈的相互作用．通过分析在不同退火温度下样品LEED衍射点的变化，研究了重构结构的热稳定性，发现三种结构的热稳定性顺序是：锯齿结构〉c（2×2）O重构〉（√2×2√2）R45°-O重构．

外文摘要：The reconstructed structures of Cu（100） surface induced by O2 dissociative adsorption were investigated 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.