Scanning tunneling microscopy and photoelectron spectroscopy investigation of the sexithiophene:C-60 donor-acceptor nanostructure formation on graphite

作者：Wang Rui; Mao Hong Ying; Huang Han; Qi Dong Chen; Chen Wei^*

来源：Journal of Applied Physics, 2011, 109(8): 084307.

DOI：10.1063/1.3573779

The organic donor-acceptor nanostructure formation processes of C-60 and alpha-sexithiophene (6T) on graphite are monitored by in situ low-temperature scanning tunneling microscopy and synchrotron-based photoelectron spectroscopy experiments. It is found that the intermolecular interaction between C-60 and 6T plays a key role in the formation of organic nanostructures on graphite. Room temperature deposition of C-60 on the 6T monolayer on the weakly interacting graphite substrate results in the coexistence of three energetically stable structural motifs with a well-defined supramolecular arrangement, including C-60 zigzag filament, C-60 hexagon and C-60-pair filament, and hence the formation of C-60:6T molecular glass on graphite. Our results show that only the thermally stable C-60 zigzag filaments can develop into a long-range ordered two-dimensional C-60 zigzag chain array by annealing the system at 350 K.

• 出版日期2011-4-15