- 著者
- 松本 崇裕 山名 達 ウー テ・ナイン 菊池 裕嗣 木村 宗弘 赤羽 正志
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2013, pp."PA23-1"-"PA23-2", 2013-09-08
近年、高分子安定化ブルー相液晶(PS-BPLC)の次世代ディスプレイへの応用が期待されている。しかし、ブルー相液晶とポリマーとの相互作用については未だ不明な点が多く、直接測定することが難しい。そのため本研究では、ネマティック相におけるPS-BPLCのホスト液晶の極角アンカリングエネルギーを評価し、援用することを試みた。さらに、ここで測定された極角アンカリングエネルギーとヒステリシス及び残留複屈折との相関について考察する。
- 著者
- 田坂 茂 林 陽佑 杉田 篤史
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2005, pp.107-108, 2005-09-05
- 著者
- 三宅 敢 中田 未知 高西 陽一 石川 謙 渡辺 順次 竹添 秀男 Lee C. H. 山本 隆一
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2002, pp.317-318, 2002-10-09
If the bent-core molecules exhibit nematic phases, they could have biaxiality due to their molecular shapes. Recently a liquid crystal material containing a thiazole unit as a central core was synthesized and found to exhibit an interesting nematic phase. Under an optical microscope, the Schlieren textures were observed in the nematic phase of a homeotropically aligned cell. In the nematic phase range, we observed a spontaneous orientational change associated with characteristic texture changes, which may provide the information of the nature of the nematic phase. Two reflections were observed at a small angle corresponding to a layer periodicity even in the nematic phase, suggesting the existence of a cybotactic formation of the layer structure. In aligned samples, each peak splits into two. Based on these experimental observations, the possible existence of the biaxial nematic phase will be discussed.
We have found the new types of photonic liquid crystal, SmBP_<Iso> Phase, which shows the uniform isotropic iridescent color strongly dependent on the concentration, chirality and temperature for the first time. SmBP_<Iso> has both the finite local order parameter of the helix of the orientation and the smectic layer simultaneously, but spontaneously achieves complete isotropic nature in optical wave-length without any discontinuity in mesoscopic length scales. It was confirmed by visco-elastic measurement that the SmBP_<Iso> should be originated from the anomalous softening of the smectic layers due to the freezing effect on the molecular fluctuation induced by the introduction of the connection of the molecules. We expected that the random distribution of the distinct helix in 3-dimensional space can be stabilized by the apparent elastic long-range interaction "field" produced by the deformation of the smectic order. We have also first recognized two different types of thermodynamic phase transitions among SmBP phases, order-disorder transition for the spatial arrangement of the helix and the transition of the connectivity of smectic layers, which are attributed to the transition of the spatial distribution of the both orders, not belong to the order parameters themselves.
In this study, effective chiral dopants possessing both rod-and arch-like control sites for the molecular arrangements were synthesized. In the nematic phases doped with these dopant compounds, their HTP values and generation of blue phases were investigated. As the result, the dopant showed very large HTPs, which indicated our methodology was suitable for generation of strong helicity. Further, the structure effect of the arch-site was investigated by the comparison of the homologues 1, 2 and 3.
- 著者
- 孫 賀 ウー テナイン 木村 宗弘 赤羽 正志
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2013, pp."PA15-1"-"PA15-2", 2013-09-08
近年、コストダウンやプロセス簡略化などが可能であることから、高性能な光配向材料の開発が広く進められている。新材料の評価法として、界面配向の調査は重要である。本研究では、新規に提案した光配向膜で光配向液晶セルを作製した。作製したセルは、エリプソメーターで、光配向膜表面の異方性を調査した。また、従来の液晶-配向膜界面分子の配向評価法、色素添加ブリュースター法などを用い、光配向セルに、有効な手法であるか検討する。
1 0 0 0 PA07 Investigation of alignment of nematic liquid crystal on a micro-patterned polyimide surface
- 著者
- ウー テ ナイン 木村 宗弘 赤羽 正志
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2005, pp.251-252, 2005-09-05
Alignment properties of nematic liquid crystals in contact with a micro-patterned polyimide surface were investigated. The pattern was formed by stripes of alternating planar and homeotropic anchoring. The theoretical and experimental results implied that domains with opposite tilt angle of LC directors were formed inside the cell. The average tilt angle was nearly 45°and fairly varied from this equilibrium value depending on the treatment method.
- 著者
- 濱本 汰一 苑田 晃成 舟橋 正浩
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2013, pp."3b10-1"-"3b10-2", 2013-09-08
Cholesteric liquid-crystalline semiconductors have a potential for electrically pumped devises which can emit circularly polarized light. We synthesized a dimeric liquid crystal 1 consisting of one chiral moiety and two phenylterthiophene parts. In order to increase the carrier mobility, the volume of electronically inactive chiral moiety is minimized. From the results of the differential scanning calorimetry (DSC), observation of the micrographic textures under a polarizing optical microscope, and X-ray diffraction (XRD), liquid crystal 1 exhibits a cholesteric phase at room temperature. Moreover, the helical structure in the cholesteric phase can be fixed since compound 1 exhibits a glass transition at 15℃.
1 0 0 0 OA 1B118 イソニペコチン酸をコア構造に持つ強誘電性液晶
- 著者
- 小野 いく郎 加園 克巳
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2004, pp.44-45, 2004-09-26
短冊形(長方形)の分子の集合体はその対称性が棒状分子に比べ低いことから、異なった相転移を示すことが、期待される。剛体球を連結したモデルで分子濃度による相の違いを調べた。5x2の短冊形の分子は濃度の低い方から等方相、ネマチック相、スメクチック相の他に2軸性のスメクチック相が現れる。この相と強誘電相、反強誘電相について論じる。
1 0 0 0 OA 3L302 三環性トロボノイド液晶の合成
- 著者
- 田家 尚志 森 章 竹下 齋
- 出版者
- 日本液晶学会
- 雑誌
- 液晶討論会講演予稿集
- 巻号頁・発行日
- vol.16, pp.322-323, 1990-09-12
- 著者
- 小笠原 昌則 本間 道則 能勢 敏明
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2005, pp.401-402, 2005-09-05
- 著者
- 多谷 健嗣 趙 景がん 尾崎 幸洋
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2003, pp.9-10, 2003-10-14
The orientation dynamics of ferroelectric liquid crystal mixtures with ultrashort pitch (FLCUSP) in the Sm-C^* phase during the electric-field-induced switching between the two SSFLC states was investigated by means of time-resolved FT-IR spectroscopy. It was found that the dynamical behavior of orientation indicated by the C=O group in the chiral dopants is different from that indicated by the core moiety in the base liquid crystals. We also studied the orientation dynamics of SSFLC especially focusing on the relationship between orientation and rotation during the electric-field-induced switching.
We prepared silica films hybridized with a chromonic lyotropic liquid crystal, C. I. Direct Blue (B67), by spin-coating. The hybrid films with 2-(2-aminoethoxy) ethanol (AEE) had ordered structures templated by the columnar assemblies of B67. Such structure of the hybrid films was not observed without AEE. Moreover, we studied the hybrid films by dip-coating. As a result, the hybrid films possessed preferred orientation. The columnar assemblies of B67 were aligned to parallel to dipping direction.
- 著者
- 佐藤 安弘 山口 留美子 佐藤 進
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2005, pp.441-442, 2005-09-05
1 0 0 0 OA 3G418 側鎖に水素結合をもつ高分子液晶の誘電的性質
1 0 0 0 OA 2A17 強誘電性液晶のLifshitz Pointでの配向と電気光学特性
1 0 0 0 PDb02 イオン性レアアース錯体液晶
- 著者
- 金澤 昭彦 池田 富樹 長瀬 裕
- 出版者
- 日本液晶学会
- 雑誌
- 日本液晶学会討論会講演予稿集
- 巻号頁・発行日
- no.2000, pp.381-382, 2000-10-23
Liquid-crystalline behavior and optical property of novel ionic liquid crystals, which are surfactant complexes containing rare-earth ions, were evaluated by differential scanning calorimetry, polarizing optical microscopy, X-ray diffractometry, absorption spectroscopy, and fluorescence spectroscopy. The rare-earth complexes were found to show a smectic A (S_A) phase in which a homeotropic structure was formed spontaneously. It is significant that the rare-earth complexes exhibit a stable liquid-crystalline phase and a simple phase transition behavior in comparison with the parent compounds without rare-earth ions. In addition, it was demonstrated that the complexes form a unique structure in the self-organization. Such rare-earth-containing liquid crystals will be expected to act as new light-emitting materials in optoelectronic device applications.
