Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9595610 | Surface Science | 2005 | 9 Pages |
Abstract
Utilizing the substrate of Ga bilayer grown on Si(1Â 1Â 1)-â3Â ÃÂ â3-Ga, we have investigated the structural transition of pentacene monolayer induced by moderate annealing. Short-range ordering has been observed in the monolayer pentacene deposited at room temperature. Annealing the sample at â¼350Â K produced ordered pentacene monolayer with the “brick-wall” adsorption pattern. The STM images with sub-molecular resolution revealed that the orbital symmetry of the HOMO is reduced from D2h to C2v, due to the substrate-molecule interaction, while the deeper HOMO-1 orbital remains intact. Further annealing at â¼400Â K led to the formation of molecular dimers as well as the structural transition from “brick-wall” packing to “herringbone” pattern.
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Authors
Jun-Zhong Wang, Ke-Hui Wu, Wei-Sheng Yang, Xing-Jun Wang, J.T. Sadowski, Y. Fujikawa, T. Sakurai,