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In-Plane Orientation Control of 2,7-Diphenyl[1]benzothieno[3,2-b][1]benzothiophene Monolayer on Bismuth-Terminated Si(111) Vicinal Surfaces with Wettability Optimization
| Title: | In-Plane Orientation Control of 2,7-Diphenyl[1]benzothieno[3,2-b][1]benzothiophene Monolayer on Bismuth-Terminated Si(111) Vicinal Surfaces with Wettability Optimization |
| Authors: | Ohtomo, Manabu Browse this author | | Tsuchida, Yuya Browse this author | | Muraya, Naoki Browse this author | | Yanase, Takashi Browse this author | | Sakai, Seiji Browse this author →KAKEN DB | | Yonezawa, Tetsu Browse this author →KAKEN DB | | Nagahama, Taro Browse this author →KAKEN DB | | Hasegawa, Tetsuya Browse this author →KAKEN DB | | Shimada, Toshihiro Browse this author →KAKEN DB |
| Issue Date: | 6-Jun-2013 |
| Publisher: | American Chemical Society |
| Journal Title: | The Journal of Physical Chemistry C |
| Volume: | 117 |
| Issue: | 22 |
| Start Page: | 11555 |
| End Page: | 11561 |
| Publisher DOI: | 10.1021/jp3117837 |
| Abstract: | We report the in-plane orientation control of a high-mobility organic semiconductor: 2,7-diphenyl[1]benzothieno[3,2-b][1]benzothiophene (DPh-BTBT). As previously reported for the monolayer pentacene, it was revealed that bunched steps on the vicinal Si(111) with a bismuth termination break the surface 3-fold symmetry and reduce the multiple orientation of the DPh-BTBT grains into a quasi-single orientation. Interestingly, the critical step height necessary for the orientation control was higher than that of pentacene. We examined several mechanisms of orientation control and concluded that the facet nanostructure fabricated by step bunching works as an anisotropic template for the nucleation. We also show the wettability optimization of the bismuth-terminated silicon surface and show that the growth mode of DPh-BTBT is dependent on the surface nanostructure of Bi–Si. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/56245 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 島田 敏宏
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