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Journal Articles

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

Otomo, 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:8.76(Chemistry, Physical)

We report in-plane orientation control of newly developed high-mobility organic semiconductor: 2,7-diphenyl[1]benzothieno[3,2-$$b$$][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.

Oral presentation

Characterisation of coastal geological environment, 2; Understanding of geological and hydrochemical properties of Horonobe coastal environment through survey of existing information and ground geophysics

Matsuoka, Toshiyuki; Yamanaka, Yoshiaki; Asamori, Koichi; Amano, Kenji; Niizato, Tadafumi; Ota, Kunio; Shigeta, Naotaka; Marui, Atsunao*; Uchida, Toshihiro*

no journal, , 

no abstracts in English

Oral presentation

Characterisation of coastal geological environment, 1; Programme overview

Ota, Kunio; Shigeta, Naotaka; Marui, Atsunao*; Uchida, Toshihiro*; Kiho, Kenzo*; Hasegawa, Takuma*

no journal, , 

JAEA commenced a surface-based investigation programme under the collaboration with AIST and CRIEPI, which would focus on the establishment of comprehensive site characterisation technology and the enhancement of its reliability through the characterisation of the geological environment at the coastal region in Horonobe, Hokkaido. Here the programme, particularly background, goal, main issues and timeplan, is overviewed.

Oral presentation

Orientation control and photoemission studies of organic films on Bi terminated Si(331)

Otomo, Manabu; Tsuchida, Yuya*; Sakai, Seiji; Hasegawa, Tetsuya*; Shimada, Toshihiro*

no journal, , 

no abstracts in English

Oral presentation

A Three-dimensional crustal electrical resistivity model beneath southern Tohoku district, NE Japan

Motoyama, Aoi*; Ogawa, Yasuo*; Uyeshima, Makoto*; Asamori, Koichi; Uchida, Toshihiro*; Hase, Hideaki*; Koyama, Takao*; Sakanaka, Shinya*; Yamaya, Yusuke*; Aizawa, Koki*; et al.

no journal, , 

no abstracts in English

Oral presentation

A Three-dimensional electrical conductivity model of the crust beneath the southern Tohoku district, NE Japan

Motoyama, Aoi*; Ichiki, Masahiro*; Ogawa, Yasuo*; Uyeshima, Makoto*; Asamori, Koichi; Uchida, Toshihiro*; Koyama, Takao*; Sakanaka, Shinya*; Hase, Hideaki*; Aizawa, Koki*; et al.

no journal, , 

We compiled the magnetotelluric (MT) and geomagnetic transfer function (GDS) data which were acquired by Uchida (2004), Umeda et al. (2008), Asamori et al. (2011), Uyeshima (private comm.) and Ogawa (private comm). The 118 observation sites locate in the study area. Both MT and GDS frequency response was used to model three-dimensional resistivity distribution of the southern Tohoku district, NE Japan. The resultant resistivity model reveals no conductor beneath the onshore forearc in Fukushima prefecture. The model rather shows resistor there with over several-thousand ohm-m, which corresponds to the Abukuma batholiths. Thus, our model indicates that the area only around Iwaki-city is peculiar forearc, where fluid migrates upward from deep crust.

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