低覆盖度下五螺烯分子在Cd(0001)表面的STM研究

STM Study of Pentahelicene Molecules on Cd(0001)Surface under Low Coverage

利用超高真空-低温扫描隧道显微镜(STM)在Cd(0001)表面对低覆盖度下吸附的五螺烯分子([5]H,C_(30)H_(18))进行了研究。研究发现,在极低的覆盖度下,可以在Cd(0001)表面观察到少量单分子以及异手性范德瓦尔斯二聚体。继续沉积分子,先后出现大量由[5]H分子形成的团簇和二维岛,且团簇的形态随偏置电压变化而变化。

The pentahelicene molecules([5]H,C_(30)H_(18))adsorbed on the surface of Cd(0001)under low coverage were studied using ultra-high vacuum-low temperature scanning tunneling microscope(STM).The study found that under extremely low coverage,a small amount of single molecules and heterochiral van der Waals dimers can be observed on the surface of Cd(0001).As molecules continued to be deposited,a large number of clusters and two-dimensional islands formed by[5]H molecules appeared successively,and the morphology of clusters changed with the bias voltage.