摘要
                
                    应用第一性原理DFT(密度泛函理论)研究了具有(1×1)和(2×1)对称性的SnO2(110)氧化表面、还原表面和缺陷表面的几何结构与电子结构,重点分析了表面氧空穴(O vacancy)对表面电子结构的影响以及对气体分子吸附的影响。研究结果表明,由于表面空穴的存在,SnO2(110)表面能隙中都出现了明显的表面态,由于表面氧的流失而留下来的电荷是产生这些表面态的主要原因,这些电荷主要集中在Sn上和附近的空穴中,与这些电荷相关的轨道是氧化物表面吸附研究的关键。
                
                Calculation on electrical structure of SnO2 (110) surface of ( 1 × 1 ) and (2× 1 ) symmetry with first principle DFT (density functional theory) is performed. The effect of O vacancies on surface electronic structure and future adsorption is emphasized. Due to the exist of the O vacancies, the surface state originating from the electron left by the removal of oxygen appeared at the band gap, these electrons located on the top of tin atoms and O vacancies, and the orbitals associating with these electrons were considered to be the potential site where adsorption would take place.
    
    
    
    
                出处
                
                    《功能材料与器件学报》
                        
                                CAS
                                CSCD
                                北大核心
                        
                    
                        2008年第1期59-64,共6页
                    
                
                    Journal of Functional Materials and Devices
     
            
                基金
                    国家重点基础研究发展计划项目(973)〔2006CB300407〕
                    国家自然科学基金资助重点项目(90207003)
            
    
                关键词
                    SNO2
                    密度泛函理论
                    电子结构
                    能隙
                
                        SnO2 
                         density functional theory 
                         electronic structure 
                         band gap
                
     
    
    
                作者简介
金仁成(1969-),男,博士,副教授,(E-mail:rejin@dlut.edu.cn).