title: Local orientational analysis of helical filaments and nematic director in a nanoscale phase separation composed of rod-like and bent-core liquid Crystals using small- and wide-angle X-ray microbeam scattering.
abstract: We analyzed the local nanostructure in binary mixtures of rod- and bent-shaped molecules, n-pentyl-4-cyanobiphenyl (5CB) and 1,3-phenylene bis[4-(4-n-octyloxyphenyliminomethyl) benzoates] (P-8-OPIMB), respectively, using small- and wide-angle X-ray microbeam and macrobeam scattering. From the orientational X-ray scattering patterns, we concluded that the nematic director of 5CB is almost parallel to the smectic layers dominated by bent-core molecules in Bx. Moreover, we observed oriented small-angle diffraction peaks (about 300 Å), which is close to the spacing of 5-7 layers, and also consistent with the width of a helical nanofilament textures as observed by freeze-fracture transmission electron microscopy. The kinetics in B4 was also discussed based on the contact experimental method.
authors.affiliation: Department of Physics, Kyoto University, Kitashirakawaoiwake-cho , Sakyo-ku, Kyoto, 606-8502, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Takanishi
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Yao
authors.forename: Takuya
authors.initials: T
authors.lastname: Fukasawa
authors.forename: Kenji
authors.initials: K
authors.lastname: Ema
authors.forename: Youko
authors.initials: Y
authors.lastname: Ohtsuka
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Takahashi
authors.forename: Jun
authors.initials: J
authors.lastname: Yamamoto
authors.forename: Hideo
authors.initials: H
authors.lastname: Takezoe
authors.forename: Atsuo
authors.initials: A
authors.lastname: Iida