Kyushu University Academic Staff Educational and Research Activities Database
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Yasushi Okumura Last modified date:2020.01.30



Graduate School
Undergraduate School


E-Mail
Phone
092-583-7788
Fax
092-583-8902
Academic Degree
Dr of Eng
Field of Specialization
Polymer Physics, Supramolecular Science
Research
Research Interests
  • Development of Liquid Crystal/Polymer weak anchoring surface for device applications
    keyword : Liquid Crystal/Polymer weak anchoring surface
    2019.04~2021.03.
  • Control of phase separation structure and electro-optic effect of liquid crystal / siloxane polymer composite
    keyword : liquid crystal / siloxane polymer composite
    2019.04~2021.03.
  • Visualization of ion conduction by confocal microscope and its application to highly polar liquid crystal
    keyword : highly polar liquid crystal
    2019.04~2021.03.
  • Visualization of ion conduction by confocal microscope and its application to highly polar liquid crystal
    keyword : ion conduction
    2019.04~2021.03.
  • 3D observation of phase separation structure and liquid crystal director in liquid crystal/polymer composite material

    keyword : liquid crystal/polymer composite material
    2018.04~2020.03.
  • Material design and creation of substrate interface showing weak anchoring to external field response of liquid crystal
    keyword : weak anchoring
    2018.04~2020.03.
  • Three-dimensional observation of polymer and liquid crystal director in highly oriented liquid crystal / polymer composite films which show electro-optical transparency-turbidity switching
    keyword : highly oriented liquid crystal / polymer composite film
    2018.04~2020.03.
  • Optimization of polymer fraction of polymer-stabilized liquid crystal blue phase and observation of polymer distribution state
    keyword : polymer-stabilized liquid crystal blue phase
    2018.04~2020.03.
  • Dielectric relaxation measurement of a highly polar liquid crystal compound
    with dioxane unit

    keyword : highly polar liquid crystal
    2018.04~2020.03.
  • Anchoring properties of Liquid Crystal / Polymer Slippery Interfaces and Application to Polymer Stabilized Blue Phases
    keyword : Liquid Crystal / Polymer Slippery Interface
    2016.04~2018.03.
  • Control of interface anchoring using nano-fractal structure
    keyword : nano-fractal structure
    2016.04~2018.03.
  • Application of polymer stabilized blue phase to tunable filter
    keyword : polymer stabilized blue phase
    2016.04~2018.03.
  • Development of liquid crystal piezoelectric-like transducer based on flexoelectric effect and Slippery surface
    keyword : flexoelectric effect
    2016.04~2018.03.
  • Size effect on electro-optical properties in aqueous dispersion of inorganic nanosheets
    keyword : electro-optic effect, inorganic nanosheet
    2015.04~2017.03.
  • Micro-distribution of Electro-optical Properties in Polymer-Stabilized Blue Phases

    keyword : Polymer-Stabilized Blue Phase
    2015.04~2017.03.
  • Large electro-optic effects in dilute aqueous dispersions of inorganic nanosheets
    keyword : electro-optic effect, inorganic nanosheet
    2014.04~2016.03.
  • Systematic evaluation of relationship between electro-optical effect and polymer aggregation structures in polymer-stabilized blue phase by gradient-stabilization cell


    keyword : Polymer stabilized blue phase, electro-optical effect
    2014.04~2016.03.
  • Observation of Polymer structure in Polymer-Stabilized Blue Phase
    keyword : Polymer-Stabilized Blue Phase
    2013.04~2017.03.
  • Rectification mechanism in ion ratchet pump with porous polymer membranes
    keyword : Electroosmotic pump
    2014.04~2017.03.
  • Electroosmotic pump driven by alternating current using asymmetric porous polymeric membrane
    keyword : Electroosmotic pump
    2013.04~2015.03.
  • Observation of phase transition behavior and electro-optical effect in liquid crystal blue phases with high chirality by UV polarizing optical microscope

    keyword : Blue phase
    2013.04~2015.03.
  • Efficient optimization of stabilization condition of polymer-stabilized blue phase
    using gradient stabilization cell
    keyword : Polymer stabilized blue phase, electro-optical effect
    2012.05~2014.03.
  • Observation of lattice structures in liquid crystalline blue phases by confocal laser scanning microscope
    keyword : liquid crystalline blue phase, confocal laser scanning microscope
    2011.08~2014.03.
  • Development of electroosmotic pump driven by alternating current using porous polymeric membrane
    keyword : electroosmotic pump
    2011.04~2013.03.
  • Development of novel biomimetic soft matter complex system.
    keyword : Soft matter, polymer, Emulsion, liquid crystal, gel
    2009.08.
  • Study of active transfer of guest molecules in sliding host gel
    keyword : cyclodextrin, supramolecule, sliding host
    2008.05~2010.03.
  • topological gel (slide-ring gel)
    keyword : topological gel (slide-ring gel)
    1999.12~2006.09.
  • Self-assembling supramolecular systems of molecular nanotubes and polymer chains.
    keyword : Cyclodextrin, Supramolecule
    1995.09~1999.11.
Academic Activities
Reports
1. Okumura, Y., The structure controls of the macromolecules by topological restrictions of cyclic molecules, Hot topics in Polymer Science in Japan, 第56巻第8号, 586頁, 2007.08.
2. Ito, K., Shimomura, T., Okumura, Y., Structure and Function of Polymeric Inclusion Complex of Molecular Nanotubes and Polymer Chains Advanced Macromolecular and Supramolecular Materials and Process, Edited by Kurt E. Geckeler, Kluwer Academic / Plwnum Publishers, New York, 2003.01.
Papers
1. Taura, D., Hashidzume, A., Okumura, Y.; Harada, A., Cooperative Complexation of alpha-Cyclodextrin with Alternating Copolymers of Sodium Maleate and Dodecyl Vinyl Ether with Varying Molecular Weights., Macromolecules, 41 (10), 3640-3645., 2008.05.
2. Inoue, Y., Kuad, P., Okumura, Y., Takashima, Y., Yamaguchi, H., Harada, A., Thermal and Photochemical Switching of Conformation of Poly(ethylene glycol)-Substituted Cyclodextrin with an Azobenzene Group at the Chain End., Journal of the American Chemical Society, 129 (20), 6396-6397., 2007.04.
3. Karino, T., Okumura, Y., Zhao, C. M., Kidowaki, M., Kataoka, T., Ito, K., Shibayama, M., Sol-Gel Transition of Hydrophobically Modified Polyrotaxane., Macromolecules, 39 (26), 9435-9440., 2006.12.
4. Shinohara, Y., Kayashima, K., Okumura, Y., Zhao, C. M., Ito, K., Amemiya, Y., Small-angle x-ray scattering study of the pulley effect of slide-ring gels., Macromolecules, 39 (21), 7386-7391., 2006.09.
5. Karino, T., Shibayama, M., Okumura, Y., Ito, K., SANS study on pulley effect of slide-ring gel., Physica B: Condensed Matter, 385-386(Pt. 1), 807-809., 2006.06.
6. Karino, T., Okumura, Y., Zhao, C. M., Kataoka, T., Ito, K., Shibayama, M., SANS studies on deformation mechanism of slide-ring gel., Macromolecules , 38 (14), 6161-6167., 2005.08.
7. Okumura, Y., Ito, K., The polyrotaxane gel: A topological gel by figure-of-eight cross-links., Advanced Materials , 13 (7), 485-487., 2001.04.
8. Okumura, Y., Ito, K., Hayakawa, R., Nishi, T., Self-assembling dendritic supramolecule of molecular nanotubes and starpolymers., Langmuir, 16 (26), 10278-10280., 2000.12.
9. Ikeda, E., Okumura, Y., Shimomura, T., Ito, K., Hayakawa, R., Inclusion behavior between molecular nanotubes and linear polymer chains in aqueous solutions., Journal of Chemical Physics , 112 (9), 4321-4325., 2000.03.
10. Okumura, Y., Ito, K., Hayakawa, R., Theory on inclusion behavior between cyclodextrin molecules and linear polymer chains in solutions., Polymers for Advanced Technologies, 11, 815-819., 2000.11.
11. Okumura, Y., Ito, K., Hayakawa, R., Inclusion-dissociation transition in the complex formation between molecular nanotubes and linear polymer chains in solutions., Physical Review Letters, 80 (22), 5003-5006., 1998.06.
Presentations
1. Yasushi Okumura, Ryoichi Saito, Hiroki Higuchi, Hirotsugu Kikuchi, Three-dimensional observation of periodic lattice structure in liquid crystal blue phase I using confocal laser scanning microscope, THE 14th RIES-HOKUDAI INTERNATIONAL SYMPOSIUM 網 [mou] , 2013.12.
2. Yasushi Okumura, Shinji Kawazu, Hiroki Higuchi, Hirotsugu Kikuchi, Unidirectional Translational Motion of Rod-like Aggregates of Magnetite Particles Induced by Alternating Magnetic Fields, 7th international conference on materials for advanced technologies ICMAT2013, 2013.07.
3. Yasushi Okumura, Ryoichi Saito, Takahiro Ashimine, Hiroki Higuchi, Hirotsugu Kikuchi, Observation of lattice structures in liquid crystalline blue phases by confocal laser scanning microscope, 7th international conference on materials for advanced technologies ICMAT2013, 2013.07.
4. Yasushi Okumura, Takahiro Ashimine, Ryoichi Saito, Hiroki Higuchi, Hirotsugu Kikuchi, Observation of lattice structures in liquid crystalline blue phases by confocal laser scanning microscope, NUS-IMCE Bilateral Workshop, 2013.06.
5. Yasushi Okumura, Takahiro Ashimine, Ryoichi Saito, Hiroki Higuchi, Hirotsugu Kikuchi, Observation of Lattice Structures in Liquid Crystalline Blue Phases by Confocal Laser Scanning Microscope, The 1st Asian Conference on Liquid Crystals, 2012.12.
6. Yasushi Okumura, Topological gel by figure-of-eight cross-links, Nanoarchitectonics Workshop 2003, 2003.03.
Membership in Academic Society
  • Japanese Liquid Crystal Society
  • The Society of Polymer Science, Japan (SPSJ)