北京大学学报(自然科学版)

DDME分子在石墨(HOPG)表面吸附

刘锴1,杜文峰1,季航1,赵汝光1,2   

  • 收稿日期:2004-03-31 出版日期:2005-05-20 发布日期:2005-05-20

Adsorption of DDME on HOPG Investigated by Scanning Tunneling Microscopy

LIU Kai1, DU Wenfeng1, JI Hang1, ZHAO Ruguang1, 2,   

  • Received:2004-03-31 Online:2005-05-20 Published:2005-05-20

摘要: 用扫描隧道显微镜(STM)研究了用真空沉积法在高定向有序石墨(HOPG)上制备的1, 1dicyano-2, 2-(4-dimethylaminophenyl) ethylene(DDME)薄膜。DDME在石墨表面形成十分平整的分子柱状堆积二维有序结构。还观察到了随覆盖度降低转变成为其他二维有序结构,并对其形成机理进行了研究。

关键词: STM, DDME, 物理吸附

Abstract: A thin film of 1, 1-dicyano-2, 2-(4-dimethylaminophenyl) ethylene (DDME) has been grown on HOPG by a modified vacuum deposition. The films were characterized by our homemade scanning tunneling microscopy (STM) under ambient conditions. The acquired STM images exhibit that DDME can form a uniform adsorption layer at room temperature. Highly ordered parallel molecular stacks were observed with STM.

Key words: STM, DDME, physisorbed

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