ヤナセ　タカシ   Yanase Takashi   柳瀨　隆    所属   東邦大学  理学部 化学科    職種   講師
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	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
掲載誌名	正式名：JOURNAL OF PHYSICAL CHEMISTRY C ISSNコード：1932-7447
出版社	AMER CHEMICAL SOC
巻・号・頁	117(22),pp.11555-11561
著者・共著者	Manabu Ohtomo,Yuya Tsuchida,Naoki Muraya,Takashi Yanase,Seiji Sakai,Tetsu Yonezawa,Taro Nagahama,Tetsuya Hasegawa,Toshihiro Shimada
発行年月	2013/06
概要	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.
DOI	10.1021/jp3117837
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