Field ion-scanning tunneling microscopy (FI-STM) was employed to characterize the adsorption behavior of fullerenes on the Si(111)7 × 7 and Si(100)2 × 1 surfaces. On the Si(111)7 × 7 surface, C60 adsorbs preferentially on the faulted half of the 7 × 7 unit and stays still without rotation at room temperature, implying a reasonably strong interaction with the Si substrate. The C60 molecules reside stably also at room temperature without rotation on the Si(100) surface. For the first and second layers on the Si(100) surface, only local ordering of square and quasi-hexagonal patterns was observed. The orderly Stranski-Krastanov mode island formation with hexagonal packing was observed above the third layer on the Si(100)2 × 1 surface.
ASJC Scopus subject areas
- 化学 (全般)