研究者業績
基本情報
- 所属
- 兵庫県立大学 工学部 応用化学工学科 准教授
- 学位
- 工学博士(2009年3月 東京工業大学)
- J-GLOBAL ID
- 201801018251558684
- researchmap会員ID
- B000299913
研究分野
1論文
18-
Liquid Crystals XXVIII 8-8 2024年9月30日
-
Langmuir 40(29) 15271-15280 2024年7月11日 査読有り
-
Polymers 15(6) 1408-1408 2023年3月12日Copolymer films of photoalignable liquid crystalline (LC) copolymethacrylates comprised of a phenyl benzoate mesogen connected with N-benzylideneaniline end moiety (NBA2) and benzoic acid (BA) side groups exhibit a photoinduced reorientation behavior. Significant thermally stimulated molecular reorientation attains a dichroism (D) greater than 0.7 for all copolymer films and a birefringence of 0.113–0.181. In situ thermal hydrolysis of the oriented NBA2 groups decreases the birefringence to 0.111–0.128. However, the oriented structures of the film are maintained, demonstrating a photo-durability, even though the NBA2 side groups photo-react. The hydrolyzed oriented films show higher photo-durability without changing their optical properties.
-
2022 29th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD) 132-135 2022年7月5日 査読有り
-
Molecular Crystals and Liquid Crystals 676(1) 2-8 2018年11月22日Photoinduced reorientation of composite films of liquid crystalline polymethacrylate comprised of benzoic acid (BA) side groups with different length alkylene spacer (PnBAM n = 2, 6, 10) and N-benzylideneaniline carboxylic acid (NBA) is investigated using linearly polarized (LP) 365 nm light. Significant thermally stimulated in-plane molecular orientation is attained when P6BAM (n = 6) is used, but higher amount of NBA is required for the in-plane reorientation of P2BAM (n = 2) films and out-of-plane motion of the BA side groups is observed for P10BAM (n = 10) films.
MISC
13-
Journal of Photopolymer Science and Technology 32 549-552 2019年1月1日© 2019 SPST. Homogeneously aligned liquid crystal (LC) cell was fabricated using nematic LCs (NLCs) doped with a polymerizable monomer comprising of photocrosslinkable mesogenic side groups, combined with the linearly polarized UV light exposure at elevated temperature. We have clarified that the photosensitive layer forms on the substrates via the thermal polymerization, followed by generating the NLC photoalignment based on the axis-selective photocrosslinking. The LC characteristics of the photosensitive side groups of the polymerizable material play an important role in the defect-free alignment for the NLCs.
-
日本物理学会講演概要集 69(2) 535-535 2014年8月22日
-
日本物理学会講演概要集 69(1) 887-887 2014年3月5日
-
日本物理学会講演概要集 68(2) 811-811 2013年8月26日
-
日本物理学会講演概要集 68(1) 833-833 2013年3月26日
-
日本液晶学会討論会講演予稿集 (2012) "PB50-1"-"PB50-2" 2012年8月20日New oligothiophene derivatives were synthesized and their carrier mobilities were investigated by TOF technique. Further, molecular orientation of oligothiophenes on photoalignment film was evaluated.
-
日本液晶学会討論会講演予稿集 (2012) "PA49-1"-"PA49-2" 2012年8月20日We previously reported that molecular reorientation in a photo-cross-linkable liquid crystalline polymer (P6CAM) film was explored by a thermal nanoimprinting technique using a SiO_2/Si mold with a line-and-space (L&S) pattern, which direction was parallel to the mold lines. In this work, we observed molecular reorientation in P6CAM film induced by a thermal nanoimprinting technique using various molds with complex structures.
-
日本液晶学会討論会講演予稿集 2012 _2c02-1_-_2c02-2 2012年It's well known that surface relief (SR) structures in azobenzene polymer films are fabricated due to molecular migration by holography with intensity and polarization patterns of two beams interference. Blazed SR gratings, which exhibit asymmetric SR structures, exhibit asymmetrical diffraction properties, so those are useful as diffraction optical devices. Because molecular migration occurs symmetrically according to the symmetrical interference pattern, the blazed SR formation using conventional holographic techniques have not been reported. In this work, we demonstrated control of SR structure in azobenzene polymer films using controlled polarized two-beam interference.
-
電子情報通信学会技術研究報告. OME, 有機エレクトロニクス 109(251) 31-34 2009年10月16日新規の低分子液晶性フルオレン(F1)を合成した。F1およびポリフルオレン(PF)を、光配向膜を用いて一軸方向へ分子配向させることにより、青色に偏光発光するフィルムが作製できた。光配向膜の配向方向は、光配向膜作製時における直線偏光紫外(LPUV)光の露光量を調節することによって変えることができ、その配向膜上でフルオレン誘導体(FL)の配向方向が自在に制御できる。さらにはF1を用いて偏光EL素子を作製し、光学特性の評価を行った。また露光量を変化させることで光配向膜をパターニングし、パターン発光した偏光EL素子の作製にも成功した。
-
日本液晶学会討論会講演予稿集 (2004) 216-217 2004年9月26日Homeotropically aligned azobenzene liquid-crystalline elastomer (LCE) films were prepared and investigated in terms of the photoinduced bending behavior. Upon irradiation of UV light which induces photoisomerization of the azobebzene moieties, the film bent away from the UV light and reverted to the initial state when irradiated at visible light, contrary to the bending behavior of a homogeneous film. This can be explained by a different volume transformation.
講演・口頭発表等
6-
日本液晶学会討論会講演予稿集 2013年 日本液晶学会We prepared various chromophores containing hydrogen bonding unit and investigated their change in photoluminescent properties induced by mechanical stimuli. We reported photoluminescent color and lifetime tuning of complex compound of dyes and acids.
-
日本液晶学会討論会講演予稿集 2013年 日本液晶学会In this study, we synthesized new hydrogen-bonding asymmetric luminophores with different site of substitution, and evaluated their optical properties, orientation properties on hydrogen-bonding photo-alignment polymer film by UV-vis absorption spectra, fluorescent spectra, and fluorescence lifetime measurements.
-
日本液晶学会討論会講演予稿集 2013年 日本液晶学会Schiff base compound is well known as liquid crystalline material, and photoisomerization can occur. However, photoreaction of liquid crystalline polymers (LCPs) with schiff base side group have not been investigated. In this presentation, we synthesized LCPs with schiff base side group and investigated the axis-selective photo reaction.
-
日本液晶学会討論会講演予稿集 2013年 日本液晶学会We prepared novel polymethacrylates containing phenyl cyano vinyl terthiohene side chain and evaluated their mesomorphic propeties. Additionally, we synthesized oligothiophene with the same structure and explored their alignment behavior on photoaligned polymer films.
-
日本液晶学会討論会講演予稿集 2013年 日本液晶学会A photo-cross-linkable liquid crystalline polymer (PMCB6M) film is applicable to LC alignment layer and it is important to investigate reorientation behavior at the near surface of reoriented PMCB6M film. In this study, reorientation behavior of PMCB6M film in bulk and at near surface was performed by UV-vis spectroscopy and NEXAFS.