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][1]benzothiophene monolayer on bismuth-terminated Si(111) vicinal surfaces with wettability optimizationOtomo, Manabu; Tsuchida, Yuya*; Muraya, Naoki*; Yanase, Takashi*; Sakai, Seiji; Yonezawa, Tetsu*; Nagahama, Taro*; Hasegawa, Tetsuya*; Shimada, Toshihiro*
Journal of Physical Chemistry C, 117(22), p.11555 - 11561, 2013/06
Times Cited Count：2 Percentile：8.12(Chemistry, Physical)We report in-plane orientation control of newly developed high-mobility organic semiconductor: 2,7-diphenyl[1]benzothieno[3,2-][1]benzothiophene (DPh-BTBT). As previously reported on monolayer pentacene, it was revealed that bunched steps on vicinal Si(111) with bismuth termination break the surface symmetry and reduce three-fold symmetry of DPh-BTBT grains into quasi-single orientation. Interestingly, the critical step height necessary for the orientation control was different from that of pentacene. We examined several mechanisms of orientation control and concluded that the facet nano structure fabricated by step bunching is working as an anisotropic template. We will also show the wettability control of bismuth terminated silicon surface and show that the growth mode of DPh-BTBT is dependent on the surface nanostructure of Bi-Si.
Morita, Sakura; Hanaki, Shotaro; Maruyama, Shumpei; Hojo, Yuki; Nagahama, Aoi; Kudo, Isamu; Soejima, Goro; Nakamura, Yasuyuki; Kuroki, Ryoichiro
no journal, ,
The concentrated liquid waste of Fugen (ATR) is planned to be mixed and solidified using a cement mixing and solidification unit. In this facility, the concentrated liquid waste and cement as the solidification material, are mixed in the mixer and then filled into drums as the disposal containers, to produce a homogeneous and uniform waste package. The facility is being installed onsite with plans to begin service in 2026. This presentation reports on the overview of the solidification facilities and plans for putting it into service.
Hanaki, Shotaro; Morita, Sakura; Maruyama, Shumpei; Hojo, Yuki; Nagahama, Aoi; Kudo, Isamu; Sato, Junya; Tabata, Koichi; Soejima, Goro; Nakamura, Yasuyuki
no journal, ,
Waste packages are needed to satisfy the waste acceptance criteria (WAC) set by the landfill site. To produce sound waste packages that meet such criteria as uniaxial compressive strength and porosity, it is necessary to establish the range of parameters such as mixing time, rotation speed of mixing blade, and amount of cement. This presentation reports on the Beaker scale cold test conducted to determine the cement-to-waste ratio (C/W) which affects the number of waste packages produced and uniaxial compressive strength.
