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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

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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)

Submitter: 島田 敏宏

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