有机分子在单晶金表面的自组装研究

Research on self-assembly of organic molecules on single crystal Au surface

利用低温超高真空扫描隧道显微镜研究基于三嗪的小分子(TBTZ)在单晶Au(111)表面的自组装。不同覆盖率下,分子表现出不同的自组装行为。在低覆盖率下,TBTZ分子有自组装倾向,但容易受到扰动而解离,处于亚稳态;在高覆盖率下,TBTZ分子可以形成稳定的大面积自组织网络结构,同时表现出两种不同的排列方式,两种排列方式是由于两种分子构型造成的。

The self-assembly of small molecules based on the triazine（TBTZ）on the single crystal Au（111）surface is studied by the cryogenic ultrahigh vacuum scanning tunneling microscope.Under different coverage rates,the molecules exhibit different self-assembly behaviors.Under the low coverage rate,the TBTZ molecules have self-assembly tendency,but they are easily dissociated by disturbance and are in metastable state.Under the high coverage rate,the TBTZ molecules can form the large area of the stable self-assembly network structure and at the same time show two different arrangements.The two arrangements are caused by two molecular configurations.