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Optical manipulation of the nematic director field around microspheres covered with an azo-dendrimer monolayer.

Optics express

Hirankittiwong P, Chattham N, Limtrakul J, Haba O, Yonetake K, Eremin A, Stannarius R, Takezoe H.
PMID: 25321218
Opt Express. 2014 Aug 25;22(17):20087-93. doi: 10.1364/OE.22.020087.

We report here the optical manipulation of the director and topological defect structures of nematic liquid crystals around a silica microparticle with azobenzene-containing dendrimers (azo-dendrimers) on its surface. We successfully demonstrate the successive switching processes from hedgehog, to boojum,...

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Hirankittiwong P, Chattham N, Limtrakul J, et al. Optical manipulation of the nematic director field around microspheres covered with an azo-dendrimer monolayer. Opt Express. 2014;22(17):20087-93doi: 10.1364/OE.22.020087.
Hirankittiwong, P., Chattham, N., Limtrakul, J., Haba, O., Yonetake, K., Eremin, A., Stannarius, R., & Takezoe, H. (2014). Optical manipulation of the nematic director field around microspheres covered with an azo-dendrimer monolayer. Optics express, 22(17), 20087-93. https://doi.org/10.1364/OE.22.020087
Hirankittiwong, Pemika, et al. "Optical manipulation of the nematic director field around microspheres covered with an azo-dendrimer monolayer." Optics express vol. 22,17 (2014): 20087-93. doi: https://doi.org/10.1364/OE.22.020087
Hirankittiwong P, Chattham N, Limtrakul J, Haba O, Yonetake K, Eremin A, Stannarius R, Takezoe H. Optical manipulation of the nematic director field around microspheres covered with an azo-dendrimer monolayer. Opt Express. 2014 Aug 25;22(17):20087-93. doi: 10.1364/OE.22.020087. PMID: 25321218.
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Enhancing and reducing chirality by opposite circularly-polarized light irradiation on crystalline chiral domains consisting of nonchiral photoresponsive W-shaped liquid crystal molecules.

Soft matter

Choi SW, Takezoe H.
PMID: 27714293
Soft Matter. 2016 Sep 28;12(38):7937-7942. doi: 10.1039/c6sm01343k.

We found possible chirality enhancement and reduction in chiral domains formed by photoresponsive W-shaped molecules by irradiation with circularly polarized light (CPL). The W-shaped molecules exhibit a unique smectic phase with spontaneously segregated chiral domains, although the molecules are...

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Choi SW, Takezoe H. Enhancing and reducing chirality by opposite circularly-polarized light irradiation on crystalline chiral domains consisting of nonchiral photoresponsive W-shaped liquid crystal molecules. Soft Matter. 2016;12(38):7937-7942doi: 10.1039/c6sm01343k.
Choi, S. W., & Takezoe, H. (2016). Enhancing and reducing chirality by opposite circularly-polarized light irradiation on crystalline chiral domains consisting of nonchiral photoresponsive W-shaped liquid crystal molecules. Soft matter, 12(38), 7937-7942. https://doi.org/10.1039/c6sm01343k
Choi, Suk-Won, and Takezoe, Hideo. "Enhancing and reducing chirality by opposite circularly-polarized light irradiation on crystalline chiral domains consisting of nonchiral photoresponsive W-shaped liquid crystal molecules." Soft matter vol. 12,38 (2016): 7937-7942. doi: https://doi.org/10.1039/c6sm01343k
Choi SW, Takezoe H. Enhancing and reducing chirality by opposite circularly-polarized light irradiation on crystalline chiral domains consisting of nonchiral photoresponsive W-shaped liquid crystal molecules. Soft Matter. 2016 Sep 28;12(38):7937-7942. doi: 10.1039/c6sm01343k. PMID: 27714293.
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Short-range smectic fluctuations and the flexoelectric model of modulated nematic liquid crystals.

Physical review. E

Vaupotič N, Curk S, Osipov MA, Čepič M, Takezoe H, Gorecka E.
PMID: 26986385
Phys Rev E. 2016 Feb;93(2):022704. doi: 10.1103/PhysRevE.93.022704. Epub 2016 Feb 12.

We show that the flexoelectric model of chiral and achiral modulated nematics predicts the compression modulus that is by orders of magnitude lower than the measured values. The discrepancy is much larger in the chiral modulated nematic phase, in...

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Vaupotič N, Curk S, Osipov MA, et al. Short-range smectic fluctuations and the flexoelectric model of modulated nematic liquid crystals. Phys Rev E. 2016;93(2):022704doi: 10.1103/PhysRevE.93.022704.
Vaupotič, N., Curk, S., Osipov, M. A., Čepič, M., Takezoe, H., & Gorecka, E. (2016). Short-range smectic fluctuations and the flexoelectric model of modulated nematic liquid crystals. Physical review. E, 93(2), 022704. https://doi.org/10.1103/PhysRevE.93.022704
Vaupotič, Nataša, et al. "Short-range smectic fluctuations and the flexoelectric model of modulated nematic liquid crystals." Physical review. E vol. 93,2 (2016): 022704. doi: https://doi.org/10.1103/PhysRevE.93.022704
Vaupotič N, Curk S, Osipov MA, Čepič M, Takezoe H, Gorecka E. Short-range smectic fluctuations and the flexoelectric model of modulated nematic liquid crystals. Phys Rev E. 2016 Feb;93(2):022704. doi: 10.1103/PhysRevE.93.022704. Epub 2016 Feb 12. PMID: 26986385.
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Thermal diffusivity anisotropy measured by a temperature wave method in the homologous series of (p-alkoxybenzylidene)-p'-octylaniline (nO.8).

The Journal of chemical physics

Uehara M, Takezoe H, Vaupotič N, Pociecha D, Gorecka E, Aoki Y, Morikawa J.
PMID: 26298152
J Chem Phys. 2015 Aug 21;143(7):074903. doi: 10.1063/1.4928587.

The anisotropy of thermal diffusivity in four homologues of (p-alkoxybenzylidene)-p'-octylaniline (nO.8, n = 4 - 7) was measured using a temperature wave method. The results show that the thermal diffusivity component along the director (α(∥)) is considerably larger than...

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Uehara M, Takezoe H, Vaupotič N, et al. Thermal diffusivity anisotropy measured by a temperature wave method in the homologous series of (p-alkoxybenzylidene)-p'-octylaniline (nO.8). J Chem Phys. 2015;143(7):074903doi: 10.1063/1.4928587.
Uehara, M., Takezoe, H., Vaupotič, N., Pociecha, D., Gorecka, E., Aoki, Y., & Morikawa, J. (2015). Thermal diffusivity anisotropy measured by a temperature wave method in the homologous series of (p-alkoxybenzylidene)-p'-octylaniline (nO.8). The Journal of chemical physics, 143(7), 074903. https://doi.org/10.1063/1.4928587
Uehara, Michiru, et al. "Thermal diffusivity anisotropy measured by a temperature wave method in the homologous series of (p-alkoxybenzylidene)-p'-octylaniline (nO.8)." The Journal of chemical physics vol. 143,7 (2015): 074903. doi: https://doi.org/10.1063/1.4928587
Uehara M, Takezoe H, Vaupotič N, Pociecha D, Gorecka E, Aoki Y, Morikawa J. Thermal diffusivity anisotropy measured by a temperature wave method in the homologous series of (p-alkoxybenzylidene)-p'-octylaniline (nO.8). J Chem Phys. 2015 Aug 21;143(7):074903. doi: 10.1063/1.4928587. PMID: 26298152.
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Monolayer Filaments versus Multilayer Stacking of Bent-Core Molecules.

Angewandte Chemie (International ed. in English)

Matraszek J, Topnani N, Vaupotič N, Takezoe H, Mieczkowski J, Pociecha D, Gorecka E.
PMID: 26833945
Angew Chem Int Ed Engl. 2016 Mar 01;55(10):3468-72. doi: 10.1002/anie.201510123. Epub 2016 Feb 02.

Bent-core materials exhibiting lamellar crystals (B4 phase), when dissolved in organic solvents, formed gels with helical ribbons made of molecular monolayers and bilayers, whereas strongly deformed stacks of 5-6 layers were found in the bulk samples. The width and...

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Matraszek J, Topnani N, Vaupotič N, et al. Monolayer Filaments versus Multilayer Stacking of Bent-Core Molecules. Angew Chem Int Ed Engl. 2016;55(10):3468-72doi: 10.1002/anie.201510123.
Matraszek, J., Topnani, N., Vaupotič, N., Takezoe, H., Mieczkowski, J., Pociecha, D., & Gorecka, E. (2016). Monolayer Filaments versus Multilayer Stacking of Bent-Core Molecules. Angewandte Chemie (International ed. in English), 55(10), 3468-72. https://doi.org/10.1002/anie.201510123
Matraszek, Joanna, et al. "Monolayer Filaments versus Multilayer Stacking of Bent-Core Molecules." Angewandte Chemie (International ed. in English) vol. 55,10 (2016): 3468-72. doi: https://doi.org/10.1002/anie.201510123
Matraszek J, Topnani N, Vaupotič N, Takezoe H, Mieczkowski J, Pociecha D, Gorecka E. Monolayer Filaments versus Multilayer Stacking of Bent-Core Molecules. Angew Chem Int Ed Engl. 2016 Mar 01;55(10):3468-72. doi: 10.1002/anie.201510123. Epub 2016 Feb 02. PMID: 26833945.
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A Twist-Bend Nematic (NTB ) Phase of Chiral Materials.

Angewandte Chemie (International ed. in English)

Gorecka E, Vaupotič N, Zep A, Pociecha D, Yoshioka J, Yamamoto J, Takezoe H.
PMID: 26178301
Angew Chem Int Ed Engl. 2015 Aug 24;54(35):10155-9. doi: 10.1002/anie.201502440. Epub 2015 Jul 14.

New chiral dimers consisting of a rod-like and cholesterol mesogenic units are reported to form a chiral twist-bend nematic phase (NTB *) with heliconical structure. The compressibility of the NTB phase made of bent dimers was found to be...

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Gorecka E, Vaupotič N, Zep A, et al. A Twist-Bend Nematic (NTB ) Phase of Chiral Materials. Angew Chem Int Ed Engl. 2015;54(35):10155-9doi: 10.1002/anie.201502440.
Gorecka, E., Vaupotič, N., Zep, A., Pociecha, D., Yoshioka, J., Yamamoto, J., & Takezoe, H. (2015). A Twist-Bend Nematic (NTB ) Phase of Chiral Materials. Angewandte Chemie (International ed. in English), 54(35), 10155-9. https://doi.org/10.1002/anie.201502440
Gorecka, Ewa, et al. "A Twist-Bend Nematic (NTB ) Phase of Chiral Materials." Angewandte Chemie (International ed. in English) vol. 54,35 (2015): 10155-9. doi: https://doi.org/10.1002/anie.201502440
Gorecka E, Vaupotič N, Zep A, Pociecha D, Yoshioka J, Yamamoto J, Takezoe H. A Twist-Bend Nematic (NTB ) Phase of Chiral Materials. Angew Chem Int Ed Engl. 2015 Aug 24;54(35):10155-9. doi: 10.1002/anie.201502440. Epub 2015 Jul 14. PMID: 26178301.
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Efficacy of a combined protocol for re-insemination of open cows after early pregnancy diagnosis using ultrasonography and its effect on fertility.

Open veterinary journal

Gaja AO, Al-Dahash SY, Kubota C, Kojima T, Hatazoe I.
PMID: 26623310
Open Vet J. 2013;3(1):43-6. Epub 2013 Apr 28.

The objective of the present field study was to establish the beneficial effects of re-insemination of non-pregnant cows using ultrasonography 20 to 23 days after the artificial insemination. A total of 245 Japanese Black cows were artificially inseminated and...

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Gaja AO, Al-Dahash SY, Kubota C, et al. Efficacy of a combined protocol for re-insemination of open cows after early pregnancy diagnosis using ultrasonography and its effect on fertility. Open Vet J. 2013;3(1):43-6
Gaja, A. O., Al-Dahash, S. Y., Kubota, C., Kojima, T., & Hatazoe, I. (2013). Efficacy of a combined protocol for re-insemination of open cows after early pregnancy diagnosis using ultrasonography and its effect on fertility. Open veterinary journal, 3(1), 43-6.
Gaja, A O, et al. "Efficacy of a combined protocol for re-insemination of open cows after early pregnancy diagnosis using ultrasonography and its effect on fertility." Open veterinary journal vol. 3,1 (2013): 43-6.
Gaja AO, Al-Dahash SY, Kubota C, Kojima T, Hatazoe I. Efficacy of a combined protocol for re-insemination of open cows after early pregnancy diagnosis using ultrasonography and its effect on fertility. Open Vet J. 2013;3(1):43-6. Epub 2013 Apr 28. PMID: 26623310; PMCID: PMC4629578.
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Spontaneous Enantiomeric Resolution in a Fluid Smectic Phase of a Racemate.

Angewandte Chemie (International ed. in English)

Takanishi Y, Takezoe H, Suzuki Y, Kobayashi I, Yajima T, Terada M, Mikami K.
PMID: 10458784
Angew Chem Int Ed Engl. 1999 Aug;38(16):2353-2356. doi: 10.1002/(sici)1521-3773(19990816)38:16<2353::aid-anie2353>3.0.co;2-f.

Right- and left-handed homochiral domains segregate in a fluid smectic phase of the racemic (R*,S*)-beta-Me-TFMHPOBC analogue shown. This CF(3)-containing liquid crystalline compound exhibits an electrooptic response in a homogeneous cell, although no macroscopic dipole is expected to exist. Moreover,...

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Takanishi Y, Takezoe H, Suzuki Y, et al. Spontaneous Enantiomeric Resolution in a Fluid Smectic Phase of a Racemate. Angew Chem Int Ed Engl. 1999;38(16):2353-2356doi: 10.1002/(sici)1521-3773(19990816)38:16<2353::aid-anie2353>3.0.co;2-f.
Takanishi, Y., Takezoe, H., Suzuki, Y., Kobayashi, I., Yajima, T., Terada, M., & Mikami, K. (1999). Spontaneous Enantiomeric Resolution in a Fluid Smectic Phase of a Racemate. Angewandte Chemie (International ed. in English), 38(16), 2353-2356. https://doi.org/10.1002/(sici)1521-3773(19990816)38:16<2353::aid-anie2353>3.0.co;2-f
Takanishi, et al. "Spontaneous Enantiomeric Resolution in a Fluid Smectic Phase of a Racemate." Angewandte Chemie (International ed. in English) vol. 38,16 (1999): 2353-2356. doi: https://doi.org/10.1002/(sici)1521-3773(19990816)38:16<2353::aid-anie2353>3.0.co;2-f
Takanishi Y, Takezoe H, Suzuki Y, Kobayashi I, Yajima T, Terada M, Mikami K. Spontaneous Enantiomeric Resolution in a Fluid Smectic Phase of a Racemate. Angew Chem Int Ed Engl. 1999 Aug;38(16):2353-2356. doi: 10.1002/(sici)1521-3773(19990816)38:16<2353::aid-anie2353>3.0.co;2-f. PMID: 10458784.
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Critical fluctuations near the smectic-hexatic phase transition with anticlinic structure.

Physical review. E, Statistical, nonlinear, and soft matter physics

Shibahara S, Yamamoto J, Takanishi Y, Ishikawa K, Yokoyama H, Takezoe H.
PMID: 11909017
Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Mar;65(3):030702. doi: 10.1103/PhysRevE.65.030702. Epub 2002 Mar 07.

Layer compression modulus B measurements have been conducted near the transitions between smectic and hexatic phases with synclinic and anticlinic structures. In the synclinic structure, B shows no pretransitional softening near the phase transition. However, in the anticlinic structure,...

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Shibahara S, Yamamoto J, Takanishi Y, et al. Critical fluctuations near the smectic-hexatic phase transition with anticlinic structure. Phys Rev E Stat Nonlin Soft Matter Phys. 2002;65(3):030702doi: 10.1103/PhysRevE.65.030702.
Shibahara, S., Yamamoto, J., Takanishi, Y., Ishikawa, K., Yokoyama, H., & Takezoe, H. (2002). Critical fluctuations near the smectic-hexatic phase transition with anticlinic structure. Physical review. E, Statistical, nonlinear, and soft matter physics, 65(3), 030702. https://doi.org/10.1103/PhysRevE.65.030702
Shibahara, Seiji, et al. "Critical fluctuations near the smectic-hexatic phase transition with anticlinic structure." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 65,3 (2002): 030702. doi: https://doi.org/10.1103/PhysRevE.65.030702
Shibahara S, Yamamoto J, Takanishi Y, Ishikawa K, Yokoyama H, Takezoe H. Critical fluctuations near the smectic-hexatic phase transition with anticlinic structure. Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Mar;65(3):030702. doi: 10.1103/PhysRevE.65.030702. Epub 2002 Mar 07. PMID: 11909017.
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Dynamic local-layer response of surface-stabilized ferroelectric liquid crystals to a high electric field by time-resolved x-ray microdiffraction.

Physical review. E, Statistical, nonlinear, and soft matter physics

Takahashi Y, Iida A, Takanishi Y, Ogasawara T, Nakata M, Ishikawa K, Takezoe H.
PMID: 12786163
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 May;67(5):051706. doi: 10.1103/PhysRevE.67.051706. Epub 2003 May 23.

Time-resolved synchrotron x-ray microdiffraction measurements have directly revealed the dynamic local-layer response to the high electric field in a surface-stabilized ferroelectric liquid crystal. The irreversible layer transformation under the increasing electric field is found to consist of two stages;...

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Takahashi Y, Iida A, Takanishi Y, et al. Dynamic local-layer response of surface-stabilized ferroelectric liquid crystals to a high electric field by time-resolved x-ray microdiffraction. Phys Rev E Stat Nonlin Soft Matter Phys. 2003;67(5):051706doi: 10.1103/PhysRevE.67.051706.
Takahashi, Y., Iida, A., Takanishi, Y., Ogasawara, T., Nakata, M., Ishikawa, K., & Takezoe, H. (2003). Dynamic local-layer response of surface-stabilized ferroelectric liquid crystals to a high electric field by time-resolved x-ray microdiffraction. Physical review. E, Statistical, nonlinear, and soft matter physics, 67(5), 051706. https://doi.org/10.1103/PhysRevE.67.051706
Takahashi, Yumiko, et al. "Dynamic local-layer response of surface-stabilized ferroelectric liquid crystals to a high electric field by time-resolved x-ray microdiffraction." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 67,5 (2003): 051706. doi: https://doi.org/10.1103/PhysRevE.67.051706
Takahashi Y, Iida A, Takanishi Y, Ogasawara T, Nakata M, Ishikawa K, Takezoe H. Dynamic local-layer response of surface-stabilized ferroelectric liquid crystals to a high electric field by time-resolved x-ray microdiffraction. Phys Rev E Stat Nonlin Soft Matter Phys. 2003 May;67(5):051706. doi: 10.1103/PhysRevE.67.051706. Epub 2003 May 23. PMID: 12786163.
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Molecular orientation near the surface of a smectic liquid crystal cell showing V-shaped switching by means of attenuated total internal reflection ellipsometry.

Physical review. E, Statistical, nonlinear, and soft matter physics

Ikeda S, Ogasawara T, Nakata M, Takanishi Y, Ishikawa K, Takezoe H.
PMID: 11415119
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Jun;63(6):061703. doi: 10.1103/PhysRevE.63.061703. Epub 2001 May 15.

Attenuated total internal reflection ellipsometry was used to probe the molecular orientation and switching near the surface of a smectic liquid crystal cell showing V-shaped switching. We find that the switching occurs collectively near the surface as in the...

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Ikeda S, Ogasawara T, Nakata M, et al. Molecular orientation near the surface of a smectic liquid crystal cell showing V-shaped switching by means of attenuated total internal reflection ellipsometry. Phys Rev E Stat Nonlin Soft Matter Phys. 2001;63(6):061703doi: 10.1103/PhysRevE.63.061703.
Ikeda, S., Ogasawara, T., Nakata, M., Takanishi, Y., Ishikawa, K., & Takezoe, H. (2001). Molecular orientation near the surface of a smectic liquid crystal cell showing V-shaped switching by means of attenuated total internal reflection ellipsometry. Physical review. E, Statistical, nonlinear, and soft matter physics, 63(6), 061703. https://doi.org/10.1103/PhysRevE.63.061703
Ikeda, S, et al. "Molecular orientation near the surface of a smectic liquid crystal cell showing V-shaped switching by means of attenuated total internal reflection ellipsometry." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 63,6 (2001): 061703. doi: https://doi.org/10.1103/PhysRevE.63.061703
Ikeda S, Ogasawara T, Nakata M, Takanishi Y, Ishikawa K, Takezoe H. Molecular orientation near the surface of a smectic liquid crystal cell showing V-shaped switching by means of attenuated total internal reflection ellipsometry. Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Jun;63(6):061703. doi: 10.1103/PhysRevE.63.061703. Epub 2001 May 15. PMID: 11415119.
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Local layer structures in circular domains of an achiral bent-core mesogen observed by x-ray microbeam diffraction.

Physical review. E, Statistical, nonlinear, and soft matter physics

Takanishi Y, Ogasawara T, Ishikawa K, Takezoe H, Watanabe J, Takahashi Y, Iida A.
PMID: 12935161
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 Jul;68(1):011706. doi: 10.1103/PhysRevE.68.011706. Epub 2003 Jul 21.

The local layer structures have been investigated by x-ray microbeam diffraction in the circular domains of the SmCP phase of a banana-shaped molecule. Originally, the molecules form tilted layers with a certain tilt angle as well as nontilted ones....

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Takanishi Y, Ogasawara T, Ishikawa K, et al. Local layer structures in circular domains of an achiral bent-core mesogen observed by x-ray microbeam diffraction. Phys Rev E Stat Nonlin Soft Matter Phys. 2003;68(1):011706doi: 10.1103/PhysRevE.68.011706.
Takanishi, Y., Ogasawara, T., Ishikawa, K., Takezoe, H., Watanabe, J., Takahashi, Y., & Iida, A. (2003). Local layer structures in circular domains of an achiral bent-core mesogen observed by x-ray microbeam diffraction. Physical review. E, Statistical, nonlinear, and soft matter physics, 68(1), 011706. https://doi.org/10.1103/PhysRevE.68.011706
Takanishi, Yoichi, et al. "Local layer structures in circular domains of an achiral bent-core mesogen observed by x-ray microbeam diffraction." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 68,1 (2003): 011706. doi: https://doi.org/10.1103/PhysRevE.68.011706
Takanishi Y, Ogasawara T, Ishikawa K, Takezoe H, Watanabe J, Takahashi Y, Iida A. Local layer structures in circular domains of an achiral bent-core mesogen observed by x-ray microbeam diffraction. Phys Rev E Stat Nonlin Soft Matter Phys. 2003 Jul;68(1):011706. doi: 10.1103/PhysRevE.68.011706. Epub 2003 Jul 21. PMID: 12935161.
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Showing 1 to 12 of 183 entries