Generating oxygen adatoms on Au(997) by thermal decomposition of NO_2  

作　　者：ZHANG YuLin WU ZongFang CHEN BoHao XU LingShun PAN HaiBin MA YunSheng JIANG ZhiQuan ZHU JunFa HUANG WeiXin 

机构地区：[1]Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China [2]National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

出　　处：《Chinese Science Bulletin》2010年第34期3889-3893,共5页

基　　金：supported by the National Natural Science Foundation of China(20803072,20973161);National Basic Research Program of China(2010CB923302);the MPG-CAS partner group program

摘　　要：We report our investigation of the interaction of NO2 with the Au(997)vicinal surface by high-resolution photoelectron spectroscopy using synchrotron radiation as the excitation source.At 170 K,both core-level and valence-band photoemission results illustrate the decomposition of NO2 on the Au(997)surface at low NO2 exposures,forming coadsorbed NO(a)and O(a)species.After annealing at 300 K,NO(a)desorbs from Au(997)whereas O(a)remains on the surface.Upon annealing at 750 K,we observe no signal for adsorbed oxygen on Au(997).These results clearly demonstrate that thermal decomposition of NO2 is an effective method to generate oxygen adatoms on Au(997)under ultrahigh-vacuum conditions.We report our investigation of the interaction of NO2 with the Au（997） vicinal surface by high-resolution photoelectron spectroscopy using synchrotron radiation as the excitation source. At 170 K, both core-level and valence-band photoemission results illus- trate the decomposition of NO2 on the Au（997） surface at low NO2 exposures, forming coadsorbed NO（a） and O（a） species. After annealing at 300 K, NO（a） desorbs from Au（997） whereas O（a） remains on the surface. Upon annealing at 750 K, we observe no signal for adsorbed oxygen on Au（997）. These results clearly demonstrate that thermal decomposition of NO2 is an effective method to generate oxygen adatoms on Au（997） under ultrahigh-vacuum conditions.

关 键 词：二氧化氮 吸附原子 热分解 AU 表面相互作用 同步辐射 光谱技术 高解析度 

分 类 号：O561.4[理学—原子与分子物理] X511[理学—物理]