Hideo Takezoe
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Hideo Takezoe has a total of 130 co-authors. Here are the top co-authors by number of shared publications:
- Yoichi Takanishi
Department of Physics, Kyoto University, Kyoto 606-8502, Japan
21 shared publications Ken Ishikawa
Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
13 shared publications- Ken Ishikawa
Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152, Japan
10 shared publications - Fumito Araoka
RIKEN Center for Emergent Matter Science Wako Saitama Japan
7 shared publications - Atsuo Fukuda
Department of Electronic and Electrical Engineering, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland
6 shared publications Junji Watanabe
Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O‐okayama, Meguro‐ku, Tokyo 152‐8552, Japan, Fax: (+81) 3‐5734‐2876
5 shared publications
Latest Publications
- Open Access
- 1 October 2018
- Published by Elsevier in Journal of Molecular Liquids
- Vol. 267, 197-204
Sub-second dynamic phototuning of alignment in azodendrimer-doped nematic liquid crystal shells
- 1 October 2018
- Published by Elsevier in Journal of Molecular Liquids
- Vol. 267, 197-204
Open AccessSub-second dynamic phototuning of alignment in azodendrimer-doped nematic liquid crystal shells
- 1 June 2013
- Published by IOP Publishing in Applied Physics Express
- Vol. 6 (6) , 061701
Novel Bistable Device Using Anchoring Transition and Command Surface
A light-driven bistable device was fabricated using nematic liquid crystal (NLC) cells with bare glass and perfluoro-polymer (CYTOP) surfaces. The CYTOP surface induces a discontinuous anchoring transition, when a particular NLC (CCN-47) is introduced into the cells. By doping CCN-47 with a small amount of photoisomerizable azo-dendrimer molecules, the bare glass surface serves as a command surface, since the azo-dendrimer is spontaneously adsorbed on the surface. Using hybrid cells with such different surfaces, a homeotropic orientation was successfully converted to a hybrid orientation by very weak ultraviolet-light irradiation. Because of the bistability at a CYTOP surface, the hybrid orientation is retained.
- 1 June 2013
- Published by IOP Publishing in Applied Physics Express
- Vol. 6 (6) , 061701
Novel Bistable Device Using Anchoring Transition and Command Surface
A light-driven bistable device was fabricated using nematic liquid crystal (NLC) cells with bare glass and perfluoro-polymer (CYTOP) surfaces. The CYTOP surface induces a discontinuous anchoring transition, when a particular NLC (CCN-47) is introduced into the cells. By doping CCN-47 with a small amount of photoisomerizable azo-dendrimer molecules, the bare glass surface serves as a command surface, since the azo-dendrimer is spontaneously adsorbed on the surface. Using hybrid cells with such different surfaces, a homeotropic orientation was successfully converted to a hybrid orientation by very weak ultraviolet-light irradiation. Because of the bistability at a CYTOP surface, the hybrid orientation is retained.
- 29 November 2011
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 107 (23) , 237802
Distinctive Thermal Behavior and Nanoscale Phase Separation in the Heterogeneous Liquid-CrystalMatrix of Bent-Core MoleculesBy means of high-resolution calorimetry, we studied thermodynamic properties of the liquid-crystal phase where bent-core molecules form a helical nanofilament structure. Distinctive thermal behavior characterizing the growth process of the phase was obtained in undergoing the phase transition with many sharp peaks, indicating a highly heterogeneous structure. It has been demonstrated that such unusual behavior is commonly seen for two types of rodlike molecules as well as for various mixture compositions. We speculate that mixture systems involve a nanoscale phase-separated structure due to the remarkable aggregation effect in the bent-core molecules and that the helical nanofilament structure independently grows in the isotropic state of rodlike molecules. We also propose that the asymmetry in viscoelastic property plays a role in yielding unusual behavior.- 29 November 2011
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 107 (23) , 237802
Distinctive Thermal Behavior and Nanoscale Phase Separation in the Heterogeneous Liquid-CrystalMatrix of Bent-Core MoleculesBy means of high-resolution calorimetry, we studied thermodynamic properties of the liquid-crystal phase where bent-core molecules form a helical nanofilament structure. Distinctive thermal behavior characterizing the growth process of the phase was obtained in undergoing the phase transition with many sharp peaks, indicating a highly heterogeneous structure. It has been demonstrated that such unusual behavior is commonly seen for two types of rodlike molecules as well as for various mixture compositions. We speculate that mixture systems involve a nanoscale phase-separated structure due to the remarkable aggregation effect in the bent-core molecules and that the helical nanofilament structure independently grows in the isotropic state of rodlike molecules. We also propose that the asymmetry in viscoelastic property plays a role in yielding unusual behavior.- Open Access
- 22 April 2011
- Published by Optica Publishing Group in Optical Materials Express
- Vol. 1 (1) , 27-35
Electric-field controllable optical activity in the nano-segregated system composed of rod- and bent-core liquid crystals [Invited]
In this paper, we demonstrate a controllable optical activity emerging as electric-field-dependent circular dicroism (CD) and optical rotatory dispersion (ORD). Such controllable optical activity may offer fascinating possibilities for the production of novel optical materials/devices. The result also supports our previous result about the formation of the chiral superstructure of the 5CB molecules in the BX phase of the 5CB/P8-O-PIMB mixture system.
- 22 April 2011
- Published by Optica Publishing Group in Optical Materials Express
- Vol. 1 (1) , 27-35
Open AccessElectric-field controllable optical activity in the nano-segregated system composed of rod- and bent-core liquid crystals [Invited]
In this paper, we demonstrate a controllable optical activity emerging as electric-field-dependent circular dicroism (CD) and optical rotatory dispersion (ORD). Such controllable optical activity may offer fascinating possibilities for the production of novel optical materials/devices. The result also supports our previous result about the formation of the chiral superstructure of the 5CB molecules in the BX phase of the 5CB/P8-O-PIMB mixture system.
- 2 July 2010
- Published by American Physical Society (APS) in Physical Review E
- Vol. 82 (1) , 011701
Temperature- and electric-field-induced inverse Freedericksz transition in a nematogen with weak surface anchoring
We report electric field dependence of the anchoring transition in a mesogen on cooling in a cell with perfluoropolymer treated surfaces. Below a crossover voltage the transition is discontinuous between planar and homeotropic alignments, and as the temperature is lowered, the transition temperature decreases quadratically with the field. Above the transition is continuous between planar and tilted alignments, the transition temperature decreasing essentially linearly with the rms field. We develop a simple model to account for these results and argue that the higher field regime corresponds to a temperature driven inverse Freedericksz transition in which the director orientation starts tilting at the weakly anchored surfaces while the tilt angle remains zero at the midplane of the cell. DOI: http://dx.doi.org/10.1103/PhysRevE.82.011701 © 2010 The American Physical Society- 2 July 2010
- Published by American Physical Society (APS) in Physical Review E
- Vol. 82 (1) , 011701
Temperature- and electric-field-induced inverse Freedericksz transition in a nematogen with weak surface anchoring
We report electric field dependence of the anchoring transition in a mesogen on cooling in a cell with perfluoropolymer treated surfaces. Below a crossover voltage the transition is discontinuous between planar and homeotropic alignments, and as the temperature is lowered, the transition temperature decreases quadratically with the field. Above the transition is continuous between planar and tilted alignments, the transition temperature decreasing essentially linearly with the rms field. We develop a simple model to account for these results and argue that the higher field regime corresponds to a temperature driven inverse Freedericksz transition in which the director orientation starts tilting at the weakly anchored surfaces while the tilt angle remains zero at the midplane of the cell. DOI: http://dx.doi.org/10.1103/PhysRevE.82.011701 © 2010 The American Physical Society- 15 June 2010
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 107 (12) , 123108
Heat-driven and electric-field-driven bistable devices using dye-doped nematic liquid crystals
We have demonstrated memory and rewritable bistable devices based on an anchoring transition of a nematic liquid crystal on a perfluoropolymer surface. Spontaneous orientation changes between planar and homeotropic occur on cooling and heating with a large temperature hysteresis. Photo (heat) addressing is possible from homeotropic to planar using dye-doped samples. For a coumarin dye, photoaddressed images are preserved even after heating up the sample to the isotropic temperature, whereas, for a 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran dye the images can be erased by decreasing the temperature out of the thermal hysteresis. Orientation switching also occurs by applying an electric field with a response time of several milliseconds depending on the field strength.
- 15 June 2010
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 107 (12) , 123108
Heat-driven and electric-field-driven bistable devices using dye-doped nematic liquid crystals
We have demonstrated memory and rewritable bistable devices based on an anchoring transition of a nematic liquid crystal on a perfluoropolymer surface. Spontaneous orientation changes between planar and homeotropic occur on cooling and heating with a large temperature hysteresis. Photo (heat) addressing is possible from homeotropic to planar using dye-doped samples. For a coumarin dye, photoaddressed images are preserved even after heating up the sample to the isotropic temperature, whereas, for a 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran dye the images can be erased by decreasing the temperature out of the thermal hysteresis. Orientation switching also occurs by applying an electric field with a response time of several milliseconds depending on the field strength.
- 25 February 2010
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 517 (1) , 97-112
Syntheses and Mesogenic Properties of Dimers and Trimers Consisting of Triphenylene Donor and Anthraquinone Acceptor
- 25 February 2010
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 517 (1) , 97-112
Syntheses and Mesogenic Properties of Dimers and Trimers Consisting of Triphenylene Donor and Anthraquinone Acceptor
- 9 February 2009
- Published by Wiley in Advanced Materials
- Vol. 21 (7) , 771-775
Electrically Controllable Omnidirectional Laser Emission from a Helical‐Polymer Network Composite Film
- 9 February 2009
- Published by Wiley in Advanced Materials
- Vol. 21 (7) , 771-775
Electrically Controllable Omnidirectional Laser Emission from a Helical‐Polymer Network Composite Film
- 21 May 2008
- Published by Taylor & Francis in Ferroelectrics
- Vol. 364 (1)
Guest Editorial
(2008). Guest Editorial. Ferroelectrics: Vol. 364, No. 1, pp. v-v.
- 21 May 2008
- Published by Taylor & Francis in Ferroelectrics
- Vol. 364 (1)
Guest Editorial
(2008). Guest Editorial. Ferroelectrics: Vol. 364, No. 1, pp. v-v.