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2014 Fiscal Year Annual Research Report

電荷によって誘起されるソフトマターの階層的秩序

Research Project

Project/Area Number 23244088
Research InstitutionHigh Energy Accelerator Research Organization

Principal Investigator

瀬戸 秀紀  大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 教授 (60216546)

Co-Investigator(Kenkyū-buntansha) 荒木 武昭  京都大学, 理学(系)研究科(研究院), 准教授 (20332596)
貞包 浩一朗  同志社大学, 公私立大学の部局等, 助教 (50585148)
小貫 明  京都大学, 理学(系)研究科(研究院), 名誉教授 (90112284)
Project Period (FY) 2011-04-01 – 2016-03-31
Keywords拮抗的塩 / 中性子小角散乱 / 中性子スピンエコー / ずり流動 / ずり粘稠化 / オニオン構造
Outline of Annual Research Achievements

非イオン性界面活性剤に親水性の陽イオンと疎水性の陰イオンからなる「拮抗的塩」を加えると、陽イオンが水の部分に、陰イオンが界面活性剤の疎水基部分に分布することにより界面活性剤膜間に静電的な相互作用が生じる。これにより、非イオン性界面活性剤C12E5水溶液に拮抗的塩を加えるとラメラ構造が現れることが分かった。またこの系にずり流動を加えるとオニオン構造ができてずり粘稠化が起きることが分かった。この要因を明らかにするため、ずり流動下での中性子小角散乱を行ってナノ構造の変化を調べるとともに、中性子スピンエコー実験を行って膜の曲げ弾性係数に対する拮抗的塩の影響を調べた。
一方、水と3メチルピリジン(3MP)の混合系に拮抗的塩を加えた場合もラメラ構造が形成されるが、この系にずり流動を加えた場合にもずり粘稠化が起きることが分かった。ただしそのメカニズムは界面活性剤系の場合とは違っていて、オニオンが形成されるよりもむしろオニオンが変形して絡まっているような結果を得た。貞包はこの系の構造変化を顕微鏡で調べるため、ずり流動を加えた状態で観測できるサンプロセルを開発した。そしてこのセルを用いて水/3MP/NaBPh4混合系の測定を行い、得られた結果の一部を学会で発表した。また界面活性剤系及び水/3MPの小角散乱実験の結果をまとめて、瀬戸が国際会議で発表した。
小貫は親水性カチオンと疎水性アニオンを2成分溶液に溶かした場合の理論を構築し、電荷揺らぎと組成揺らぎの強い結合が新規な現象を生み出すことを示した。また酸素などのガスを微量に水に昆入させてできるナノバブルの物理化学的理論を作った。
荒木は電場下にある等方状態の液晶性物質に対する、コロイド粒子の添加の影響を調べた。周囲の分散媒と誘電率の違いにより、粒子の周囲では局所的にネマチック相が誘起され、マクロな物性が変化することが分かった。

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

  • Research Products

    (33 results)

All 2016 2015 2014 Other

All Int'l Joint Research (1 results) Journal Article (13 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 12 results,  Open Access: 1 results,  Acknowledgement Compliant: 2 results) Presentation (17 results) (of which Int'l Joint Research: 14 results,  Invited: 9 results) Book (1 results) Remarks (1 results)

  • [Int'l Joint Research] NIST/ORNL(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      NIST/ORNL
  • [Journal Article] Counterion effects on nano-confined metal-drug-DNA complexes2016

    • Author(s)
      N. Biswas, S. Chakraborty, A. Datta, M. Sarkar, M. K. Mukhopadhyay, M. K. Bela, and H. Seto
    • Journal Title

      Beilstein Journal of Nanotechnology

      Volume: 7 Pages: 62-67

    • DOI

      10.3762/bjnano.7.7

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Mechanism of Spontaneous Blebbing Motion of an Oil-Water Interface: Elastic Stress Generated by a Lamellar-Lamellar Transition2016

    • Author(s)
      Y. Sumino*, N. L. Yamada, M. Nagao, T. Honda, H. Kitahata, Yuri B. Melnichenko, and H. Seto
    • Journal Title

      Langmuir

      Volume: 32 Pages: 2891-2899

    • DOI

      0.1021/acs.langmuir.6b00107

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] J-PARCで見えたもの - 大強度パルス中性子源の威力2016

    • Author(s)
      瀬戸秀紀、高木成幸、海野昌喜、森一広
    • Journal Title

      化学

      Volume: 71 Pages: 68-69

  • [Journal Article] Structure formation due to antagonistic salts2016

    • Author(s)
      Akira Onuki, S.yunsuke Yabunaka, Takeaki Araki, and Ryuichi Okamoto
    • Journal Title

      Current Opinion in Colloid and Interface Science

      Volume: 22 Pages: 59-64

    • DOI

      10.1016/j.cocis.2016.02.007

    • Peer Reviewed
  • [Journal Article] Density functional theory of gas-liquid phase separation in dilute binary mixtures2016

    • Author(s)
      Ryuichi Okamoto, Akira Onuki
    • Journal Title

      J. Phys.: Condens. Matter

      Volume: 28 Pages: 244012(16p)

    • DOI

      10.1088/0953-8984/28/24/244012

    • Peer Reviewed
  • [Journal Article] マルチプローブによる物質構造の研究2015

    • Author(s)
      瀬戸秀紀
    • Journal Title

      日本結晶学会誌

      Volume: 57 Pages: 2-4

    • DOI

      10.5940/jcrsj.57.2

    • Peer Reviewed
  • [Journal Article] Fluctuations of local electric field and dipole moments in water beween metal walls2015

    • Author(s)
      Kyohei Takae, Akira Onuki
    • Journal Title

      J. Chem. Phys.

      Volume: 143 Pages: 154503(15p)

    • DOI

      10.1063/1.4932972

    • Peer Reviewed
  • [Journal Article] Bubble formation in water with addition of a hydrophobic solute2015

    • Author(s)
      Ryuichi Okamoto, Akira Onuki
    • Journal Title

      The European Physical Journal E

      Volume: 38 Pages: 72(12p)

    • DOI

      10.1140/epje/i2015-15072-9

    • Peer Reviewed
  • [Journal Article] Hydrodynamics in bridging and aggregation of two colloidal particles in a near-critical binary mixture2015

    • Author(s)
      Syunsuke Yabunaka, Ryuichi Okamoto, Akira Onuki
    • Journal Title

      Soft Matter

      Volume: 11 Pages: 5738-5747

    • DOI

      10.1039/c4sm02853h

    • Peer Reviewed
  • [Journal Article] Controlled motion of a Janus particle in periodically phase-separating binary fluids2015

    • Author(s)
      Takeaki Araki and Shintaro Fukai
    • Journal Title

      Soft Matter

      Volume: 11 Pages: 3470-3479

    • DOI

      10.1039/C4SM02357A

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Nematic caps on colloidal particles in a nematogenic liquid under an electric field2015

    • Author(s)
      Takayuki Uchida, Takeaki Araki and Akira Onuki
    • Journal Title

      Soft Matter

      Volume: 11 Pages: 2874-2884

    • DOI

      10.1039/C5SM00088B

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Orientational glass in mixtures of elliptic and circular particles: Structural heterogeneities, rotational dynamics, and rheology2014

    • Author(s)
      Kyohei Takae, Akira Onuki
    • Journal Title

      Physical Review E

      Volume: 89 Pages: 022308(14p)

    • DOI

      10.1103/PhysRevE.89.022308

    • Peer Reviewed
  • [Journal Article] Dynamics in a tetrahedral network glassformer: Vibrations, network rearrangements, and diffusion2014

    • Author(s)
      Takeshi Kawasaki, Kang Kim, and Akira Onuki
    • Journal Title

      J. Chem. Phys.

      Volume: 140 Pages: 184502(12p)

    • DOI

      10.1063/1.4873346

    • Peer Reviewed
  • [Presentation] Parametric resonance in glass2016

    • Author(s)
      Akira Onuki
    • Organizer
      Avalanches, plasticity, and nonlinear response in nonequilibrium solids
    • Place of Presentation
      Yukawa Institute, Kyoto University
    • Year and Date
      2016-03-07 – 2016-03-09
    • Invited
  • [Presentation] Electric field effects in water2015

    • Author(s)
      Akira Onuki
    • Organizer
      Pacifichem 2015
    • Place of Presentation
      Honolulu, Hawaii
    • Year and Date
      2015-12-15 – 2015-12-20
    • Int'l Joint Research / Invited
  • [Presentation] Spontaneous blebbing of interface between water and oil2015

    • Author(s)
      Yutaka Sumino, Norifumi L. Yamada, Michihiro Nagao, Takuya Honda, Hiroyuki Kitahata, Yuri B. Melnichenko, and Hideki Seto
    • Organizer
      iCeMS International Symposium: Hierarchical Dynamics in Soft Materials and Biological Matter
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      2015-09-23 – 2015-09-26
    • Int'l Joint Research / Invited
  • [Presentation] Tribology with Muon and Neutron2015

    • Author(s)
      H. Seto
    • Organizer
      International Tribology Conference(ITC2015 TOKYO)
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      2015-09-16 – 2015-09-20
    • Int'l Joint Research
  • [Presentation] Neutron Scattering: Useful Method to Understand Molecular Level Origin of Friction and Lubrication2015

    • Author(s)
      H. Seto
    • Organizer
      International Meeting on Friction - from atomic to geophysical scales
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      2015-09-14 – 2015-09-15
    • Int'l Joint Research / Invited
  • [Presentation] Shear Thickening of Charged Membrane including Antagonistic Salt2015

    • Author(s)
      M. Nagao, Y. Kawabata, S. Kugizaki, R. Bradbury, K. Weigandt, K. Sadakane, and H. Seto
    • Organizer
      European Conference on Neutron Scattering 2015
    • Place of Presentation
      Zaragoza, Spain
    • Year and Date
      2015-08-30 – 2015-09-04
    • Int'l Joint Research
  • [Presentation] Self-propelled motion of a Janus particle n periodically phase-separating binary fluids2015

    • Author(s)
      Takeaki Araki and Shintaro Fukai
    • Organizer
      International Symposium on Fluctuation and Structure out of Equilibrium 2015
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      2015-08-20 – 2015-08-23
    • Int'l Joint Research
  • [Presentation] Gel-Like Behaviors in a Mixture of Water / Organic Solvent / Antagonistic Salt Induced by Flow2015

    • Author(s)
      Koichiro Sadakane
    • Organizer
      International Symposium on Fluctuation and Structure out of Equilibrium 2015
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      2015-08-20 – 2015-08-23
    • Int'l Joint Research
  • [Presentation] Shear Thickening and Onion Formation of Non-ionic Surfactant Solution and the Effect of Charge2015

    • Author(s)
      M. Nagao, Y. Kawabata, S. Kugizaki, R. Bradbury, K. Weigandt, K. Sadakane, and H. Seto
    • Organizer
      The 2nd Asia-Oceania Conference on Neutron Scattering
    • Place of Presentation
      Manly, NSW, Australia
    • Year and Date
      2015-07-19 – 2015-07-23
    • Int'l Joint Research
  • [Presentation] Inelastic / Quasi-Elastic Neutron Scattering Instruments in J-PARC2015

    • Author(s)
      H. Seto
    • Organizer
      BIONEUTRON2015
    • Place of Presentation
      Lampedusa, Italy
    • Year and Date
      2015-05-23 – 2015-05-24
    • Int'l Joint Research / Invited
  • [Presentation] Phase field model with evaporation and condensation2015

    • Author(s)
      Akira Onuki
    • Organizer
      Coupled problems 2015
    • Place of Presentation
      Venice, Italy
    • Year and Date
      2015-05-16 – 2015-05-20
    • Int'l Joint Research / Invited
  • [Presentation] The Effect of Antagonistic Salts or Surfactants on a Mixture of Water / Organic Solvent2015

    • Author(s)
      Koichiro Sadakane
    • Organizer
      International Symposium: Hierarchical Structures and Dynamics at Soft Interfaces - from surfactants, cells to peacock's train -
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      2015-05-14 – 2015-05-14
    • Int'l Joint Research / Invited
  • [Presentation] Electro-osmotic flow of semidilute polyelectrolyte solutions2015

    • Author(s)
      植松祐輝・荒木武昭
    • Organizer
      「電荷によって誘起されるソフトマターの階層的秩序」に関する 研究会
    • Place of Presentation
      京都
    • Year and Date
      2015-02-28 – 2015-02-28
    • Invited
  • [Presentation] ネマチック液晶中でのセミフレキシブルポリマーのコンフォメーションについて2014

    • Author(s)
      内田隆之・荒木武昭
    • Organizer
      2014年 日本液晶学会 討論会
    • Place of Presentation
      松江
    • Year and Date
      2014-09-07 – 2014-09-10
    • Invited
  • [Presentation] Effect of flow on nematic liquid crystal in a slit with finite anchoring conditions2014

    • Author(s)
      Yukinori Kambe and Takeaki Araki
    • Organizer
      9th Liquid Matter Conference
    • Place of Presentation
      Lisbon, Portugal
    • Year and Date
      2014-07-21 – 2014-07-25
    • Int'l Joint Research
  • [Presentation] Dynamics of Janus particles in binary liquid mixtures2014

    • Author(s)
      Shintaro Fukai and Takeaki Araki
    • Organizer
      9th Liquid Matter Conference
    • Place of Presentation
      Lisbon, Portugal
    • Year and Date
      2014-07-21 – 2014-07-25
    • Int'l Joint Research
  • [Presentation] Conformation of a semiflexible polymer in nematic liquid crystal environment2014

    • Author(s)
      Takayuki Uchida and Takeaki Araki
    • Organizer
      25th International Liquid Crystal Conference
    • Place of Presentation
      Dublin, Ireland
    • Year and Date
      2014-06-29 – 2014-07-04
    • Int'l Joint Research
  • [Book] 物質科学の最前線2015

    • Author(s)
      村上洋一、山田和芳、平賀晴弘、遠藤康夫、雨宮健太、瀬戸秀紀、神山崇、米村雅雄
    • Total Pages
      248
    • Publisher
      共立出版
  • [Remarks] 瀬戸秀紀の研究内容

    • URL

      http://research.kek.jp/people/seto/works-j.html

URL: 

Published: 2017-01-06   Modified: 2022-01-28  

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