中文摘要：

在超高真空中使用热蒸发方法,在Au（111）表面上制备了C90分子的分子单层膜,并利用超高真空低温扫描隧道显微镜在120 K温度下对其结构进行研究。观察到C90分子在Au（111）表面上先是沿着台阶边缘生长,分子铺满一层后,会在薄膜上形成岛状结构。本文对岛状结构进行了原位高分辨表征,观察到C90分子在正偏压和负偏压下的几种不同形貌,并给出了各种形貌所对应的C90分子构型。

英文摘要：

C90 thin films were deposited on Au（111） by thermal evaporation in ultra-high vacuum,and studied using ultra-high vacuum low temperature scanning tunneling microscopy（STM）.It is found that C90 molecules prefer growth along the edge of Au（111） at low coverages.At a coverage of about one monolayer,ordered structure of C90 islands form in the second layer,while the first layer is disordered on Au（111） surface.In the ordered C90 islands,intramolecular patterns are observed in the high resolution STM images,reflecting the molecular orientation of C90,which is consistent with the molecular structure of C90.