2011年6月
Initial stage of adsorption of octithiophene molecules on Cu(111)
SURFACE SCIENCE
- ,
- ,
- ,
- 巻
- 605
- 号
- 11-12
- 開始ページ
- 1021
- 終了ページ
- 1026
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.susc.2011.02.024
- 出版者・発行元
- ELSEVIER SCIENCE BV
The initial stage of the adsorption of octithiophene (8T) molecules on a Cu(111) surface is investigated using a scanning tunneling microscope at room temperature. We find a characteristic molecular chain structure of 8T molecules on a terrace of the Cu(111) surface, which has not been reported so far for adsorption of oligothiophene molecules on metal surfaces. Up to the adsorption of 0.26 monolayer (ML), 81 molecules in the molecular chain align with their long axis parallel to the Cu < 11-2 > direction. With increasing coverage, there appear 8T molecules that align with their long axis parallel to the Cu < 110 > direction. The appearance of different molecular orientations is understood by the decrease of the number of the adsorption sites for extending the molecular chains. Fragments of 8T molecules, such as single thiophene molecules, are also observed in this work. They are trapped only at the step edges of the Cu(111) surface at the beginning and later trapped in a small Cu(111) region surrounded by 8T molecules. (C) 2011 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.susc.2011.02.024
- ISSN : 0039-6028
- Web of Science ID : WOS:000291176200007