四氰基乙烯分子在铜(110)c(2×1)-O表面上的吸附行为  

Study of Tetracyanoethylene adsorption on Cu(110)c(2×1)-O

作　　者：陈秀[1] 陈烽[1] 刘拉程[1] 柳叔毅[1] 刘小青[1] 王立[1] 

机构地区：[1]南昌大学物理学系,江西南昌330031

出　　处：《南昌大学学报（理科版）》2013年第2期168-170,204,共4页Journal of Nanchang University(Natural Science)

基　　金：国家自然科学基金资助项目(10979015)

摘　　要：采用载气携带法,实现了四氰基乙烯(TCNE)分子在铜(110)c(2×1)-O重构表面的吸附,并利用超高真空扫描隧道显微镜(UHV-STM),在原位室温下研究TCNE分子在该类重构表面上的吸附行为。研究结果表明,孤立的TCNE分子仅吸附在两条相邻的-O-Cu-O-链之间,呈"工"字形;吸附在缺陷处的TCNE分子,则TC-NE分子中的氮原子在氧原子缺失处变暗。岛状有序结构中的TCNE分子即可吸附在2条相邻的-O-Cu-O-链之间,也可吸附在单条-O-Cu-O-链上。Adsorption of Tetracyanoethylene （TCNE） molecules on Cu（110）c（2 X 1）- O reconstruction has been investigated by ultrahigh--vacuum scanning tunneling microscopy（UHV--STM） at room--tempera- ture. The isolated TCNE molecules preferred to adsorb between adjacent --O--Cu--O-- chains,and in turn demonstrated themselves as homogenous H-shaped features. For a molecule adsorbed on a point defect of the surface, the N atom of the TCNE molecule becomed darker due to the lack of an O atom. With the increase of the coverage,TCNE molecules formed some ordered islands along the [-110] direction. In these islands,the molecules could adsorb either between two adjacent --O--Cu--O-- chains or single --O--Cu --O-- chain,due to the strong interaction between molecules.

关 键 词：扫描隧道显微镜 四氰基乙烯 铜(110)c(2×1)-O重构表面 吸附行为 

分 类 号：O485[理学—固体物理]