Researcher Profile and Settings

URL

http://www.ritsumei.ac.jp/se/rp/physics/staff/

researchmap

https://researchmap.jp/sadakanekoichiro

Research Areas

• Natural sciences / Bio-, chemical, and soft-matter physics

Committee Memberships

• 領域12 運営委員, 2023/04 - 2024/03, 日本物理学会, Society
• committee member, 2007/12 - 2009/12, The Biophysical Society of Japan
• 運営委員（男女共同参画 担当）, 2007/12 - 2009/12, 日本生物物理学会

Awards

• 平成28年度溶液化学研究会奨励賞 溶液化学研究会
  2016, Japan
• 2012年度中性子科学会奨励賞 日本中性子科学会
  2012, Japan
• 第17回日本物理学会論文賞 日本物理学会
  2012, Japan
• ポスター賞 European/Japanese Molecular Liquids Annual Meeting 2011 組織委員会
  2011, Japan
• ポスター ST ERATO and CREST Joint Symposium Future Trend in Softmaterial Research with Advanced Light Source 組織委員会
  2010
• ポスター賞 European/Japanese Molecular Liquids Annual Meeting 2011 組織委員会
  2010, Japan
• ポスター賞 溶液化学研究会
  2010, Japan
• ポスター賞 日本化学会
  2008, Japan
• ポスター賞 Journal of Physical Society Japan, JPSJ編集委員会
  2007, Japan
• Papers of Editor's Choice
  2007
• Papers of Editor's Choice
  2007

Published Papers

• Alcohol-Induced Denaturation of Hen Egg White Lysozyme Studied by Infrared, Circular Dichroism, and Small-Angle Neutron Scattering
  Toshiyuki Takamuku; Tomoya Haraguchi; Ryu Sasaki; Yusuke Hozoji; Koichiro Sadakane; Hiroki Iwase
  The Journal of Physical Chemistry B, American Chemical Society (ACS), 20 Apr. 2024, Scientific journal
  

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• Chlorogenic Acid Protects DNA against Double-Strand Breaks: Evidence from Single Molecule Observation
  Haruto Ogawa; Takashi Nishio; Yuko Yoshikawa; Koichiro Sadakane; Kenichi Yoshikawa
  Chemistry Letters, The Chemical Society of Japan, 52(6) 524 - 527, 23 May 2023, Scientific journal
  

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• Markedly Different Effects of Monovalent Cations on the Efficiency of Gene Expression
  Takashi Nishio; Tomoya Masaoka; Yuko Yoshikawa; Koichiro Sadakane; Takahiro Kenmotsu; Helmut Schiessel; Kenichi Yoshikawa
  Advanced Biology, Wiley, 2200164 - 2200164, 03 Nov. 2022, Scientific journal
  

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• Synthesis of Cationic Sandwich-type Ruthenium Complexes with η⁶-Arene Ligands Bearing Long Alkyl Chains and Their Behavior in Water
  Yushi Nakamura; Misato Wakabayashi; Koichiro Sadakane; Tetsuo Ohta; Yohei Oe
  Chemistry Letters, The Chemical Society of Japan, 51(9) 936 - 939, 05 Sep. 2022, Scientific journal
  

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• Effects of self-hydrogen bonding among formamide molecules on the UCST-type liquid-liquid phase separation of binary solutions with imidazolium-based ionic liquid, [Cnmim][TFSI], studied by NMR, IR, MD simulations, and SANS.
  Masahiro Kawano; Atsuya Tashiro; Yuki Imamura; Moeno Yamada; Koichiro Sadakane; Hiroki Iwase; Masaru Matsugami; Bogdan A Marekha; Abdenacer Idrissi; Toshiyuki Takamuku
  Physical chemistry chemical physics : PCCP, 25 May 2022, Scientific journal
  

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• Anion Effects on the Mixing States of 1-Methyl-3-octylimidazolium Tetrafluoroborate and Bis(trifluoromethylsulfonyl)amide with Methanol, Acetonitrile, and Dimethyl Sulfoxide on the Meso- and Microscopic Scales
  Toshiyuki Takamuku; Atsuya Tashiro; Masahiro Kawano; Masatoshi Ando; Akira Ogawa; Koichiro Sadakane; Hiroki Iwase; Hideaki Shirota
  JOURNAL OF PHYSICAL CHEMISTRY B, AMER CHEMICAL SOC, 125(51) 13896 - 13907, Dec. 2021, Scientific journal
  

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• Direct visualization of local activities of long DNA strands via image-time correlation
  Kyongok Kang; Yue Ma; Koichiro Sadakane
  EUROPEAN BIOPHYSICS JOURNAL WITH BIOPHYSICS LETTERS, SPRINGER, 50(8) 1139 - 1155, Dec. 2021, Scientific journal
  

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• Long-time oscillations in correlation of lysozyme solutions and the effects of antagonistic salt in external electric field light scattering
  Kyongok Kang; Koichiro Sadakane
  JOURNAL OF PHYSICS COMMUNICATIONS, IOP Publishing Ltd, 5(3), Mar. 2021, Scientific journal
  

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• Emergence of Many Mini-Circles from a Coffee Suspension with Mechanical Rotation
  Hiroshi Ueno; Mayu Shono; Momoko Ogawa; Koichiro Sadakane; Kenichi Yoshikawa
  Physics, MDPI AG, 3(1) 8 - 16, 22 Jan. 2021, Scientific journal
  

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• Aggregation of the Dipeptide Leu–Gly in Alcohol–Water Binary Solvents Elucidated from the Solvation Structure for Each Moiety
  Takahiro To; Yusuke Sakamoto; Koichiro Sadakane; Masaru Matsugami; Toshiyuki Takamuku
  The Journal of Physical Chemistry B, American Chemical Society (ACS), 04 Jan. 2021, Scientific journal
  

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• Assessment of the UCST-type liquid-liquid phase separation mechanism of imidazolium-based ionic liquid, [C8mim][TFSI], and 1,4-dioxane by SANS, NMR, IR, and MD simulations
  Masahiro Kawano; Koichiro Sadakane; Hiroki Iwase; Masaru Matsugami; Bogdan A MAREKHA; Abdenacer Idrissi; Toshiyuki Takamuku
  Physical Chemistry Chemical Physics, Royal Society of Chemistry (RSC), 23(42) 24449 - 24463, 2021, Scientific journal
  

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• K+ promotes the favorable effect of polyamine on gene expression better than Na+
  Takashi Nishio; Kaito Sugino; Yuko Yoshikawa; Michiaki Matsumoto; Yohei Oe; Koichiro Sadakane; Kenichi Yoshikawa
  PLOS ONE, Public Library of Science (PLoS), 15(9) e0238447 - e0238447, 03 Sep. 2020, Scientific journal
  

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• Mixing states of imidazolium-based ionic liquid, [C4mim][TFSI], with cycloethers studied by SANS, IR, and NMR experiments and MD simulations.
  Masahiro Kawano; Koichiro Sadakane; Hiroki Iwase; Masaru Matsugami; Bogdan A Marekha; Abdenacer Idrissi; Toshiyuki Takamuku
  Physical chemistry chemical physics : PCCP, 22(9) 5332 - 5346, 07 Mar. 2020, Scientific journal
  

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• Generation of density traveling wave of micro particles under stationary photo-irradiation
  Hasegawa Yoshino; Tanaka Tomoko; Takatori Satoshi; Sadakane Koichiro; Kenmotsu Takahiro; Yoshikawa Kenichi
  Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 75.1 2757 - 2757, 2020
  

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• Self-Synchronous Swinging Motion of a Pair of Autonomous Droplets.
  Shiho Sato; Hiroki Sakuta; Koichiro Sadakane; Kenichi Yoshikawa
  ACS omega, 4(7) 12766 - 12770, 31 Jul. 2019
  

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• Construction of 3D Cellular Composites with Stem Cells Derived from Adipose Tissue and Endothelial Cells by Use of Optical Tweezers in a Natural Polymer Solution.
  Takehiro Yamazaki; Toshifumi Kishimoto; Paweł Leszczyński; Koichiro Sadakane; Takahiro Kenmotsu; Hirofumi Watanabe; Tomohiko Kazama; Taro Matsumoto; Kenichi Yoshikawa; Hiroaki Taniguchi
  Materials (Basel, Switzerland), 12(11), 30 May 2019, Scientific journal
  

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• Repulsive/attractive interaction among compact DNA molecules as judged through laser trapping: difference between linear- and branched-chain polyamines
  Kashiwagi Yusuke; Nishio Takashi; Ichikawa Masatoshi; Shew Chwen-Yang; Umezawa Naoki; Higuchi Tsunehiko; Sadakane Koichiro; Yoshikawa Yuko; Yoshikawa Kenichi
  COLLOID AND POLYMER SCIENCE, Springer Science and Business Media LLC, 297(3) 397 - 407, Mar. 2019, Scientific journal
  

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• Effects of the long octyl chain on complex formation of nickel(ii) with dimethyl sulfoxide, methanol, and acetonitrile in ionic liquid of [C8mim][TFSA].
  Toshiyuki Takamuku; Hiroyuki Sakurai; Akira Ogawa; Atsuya Tashiro; Masahiro Kawano; Yutaro Kawazu; Koichiro Sadakane; Hiroki Iwase; Kazuhiko Ozutsumi
  Physical chemistry chemical physics : PCCP, 21(6) 3154 - 3163, 06 Feb. 2019
  

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• Real-space modeling of the folding transition of a semi-rigid linear chain: Order formation by a diaphragm
  Yoshikawa H.; Takatori S.; Sadakane K.; Yoshikawa K.
  Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 74.2 2281 - 2281, 2019
  

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• Manipulating Living Cells to Construct Stable 3D Cellular Assembly Without Artificial Scaffold.
  Takehiro Yamazaki; Hiroaki Taniguchi; Shoto Tsuji; Shiho Sato; Takahiro Kenmotsu; Kenichi Yoshikawa; Koichiro Sadakane
  Journal of visualized experiments : JoVE, (140), 26 Oct. 2018
  

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• Optical Fluid Pump: Generation of Directional Flow via Microphase Segregation/Homogenization.
  Hiroki Sakuta; Shunsuke Seo; Shuto Kimura; Marcel Hörning; Koichiro Sadakane; Takahiro Kenmotsu; Motomu Tanaka; Kenichi Yoshikawa
  The journal of physical chemistry letters, 9(19) 5792 - 5796, 04 Oct. 2018
  

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• Hydrogen bonds of the imidazolium rings of ionic liquids with DMSO studied by NMR, soft X-ray spectroscopy, and SANS.
  Takamuku T; Tokuda T; Uchida T; Sonoda K; Marekha BA; Idrissi A; Takahashi O; Horikawa Y; Matsumura J; Tokushima T; Sakurai H; Kawano M; Sadakane K; Iwase H
  Physical chemistry chemical physics : PCCP, ROYAL SOC CHEMISTRY, 20(18) 12858 - 12869, 14 May 2018, Scientific journal
  

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• Membrane Formation in Liquids by Adding an Antagonistic Salt
  K. Sadakane; H. Seto
  Membrane Formation in Liquids by Adding an Antagonistic Salt, 6 26 , Mar. 2018, Scientific journal
• Emergence of Pendular and Rotary Motions of a Centimeter-Sized Metallic Sheet under Stationary Photoirradiation
  Yugo Harada; Keisuke Koyoshi; Hiroki Sakuta; Koichiro Sadakane; Takahiro Kenmotsu; Kenichi Yoshikawa
  Journal of Physical Chemistry C, American Chemical Society, 122(5) 2747 - 2752, 08 Feb. 2018, Scientific journal
  

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• Solvation state of sodium tetraphenylborate in 3-methylpyridine and its aqueous solutions
  Koichiro Sadakane; Kenta Fujii; Seiji Tsuzuki; Hikari Watanabe; Yasuhiro Umebayashi
  JOURNAL OF MOLECULAR LIQUIDS, ELSEVIER SCIENCE BV, 248 53 - 59, Dec. 2017, Scientific journal
  

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• Spontaneous Oscillations and Synchronization of Active Droplets on a Water Surface via Marangoni Convection
  Yong-Jun Chen; Koichiro Sadakane; Hiroki Sakuta; Chenggui Yao; Kenichi Yoshikawa
  Langmuir, American Chemical Society ({ACS}), 33(43) 12362 - 12368, Oct. 2017, Scientific journal
  

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• Salting-out and salting-in effects of amphiphilic salt on cloud point of aqueous methylcellulose
  Koji Nishida; Hideyuki Morita; Yutaka Katayama; Rintaro Inoue; Toshiji Kanaya; Koichiro Sadakane; Hideki Seto
  PROCESS BIOCHEMISTRY, ELSEVIER SCI LTD, 59 52 - 57, Aug. 2017, Scientific journal
  

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• Manipulating Living Cells to Construct a 3D Single-Cell Assembly without an Artificial Scaffold
  Aoi Yoshida; Shoto Tsuji; Hiroaki Taniguchi; Takahiro Kenmotsu; Koichiro Sadakane; Kenichi Yoshikawa
  POLYMERS, MDPI AG, 9(8) 319/1 - 10, Aug. 2017, Scientific journal
• Effect of interlamellar interactions on shear induced multilamellar vesicle formation
  Y. Kawabata; R. Bradbury; S. Kugizaki; K. Weigandt; Y. B. Melnichenko; K. Sadakane; N. L. Yamada; H. Endo; M. Nagao; H. Seto
  JOURNAL OF CHEMICAL PHYSICS, AMER INST PHYSICS, 147(3) 034905 , Jul. 2017, Scientific journal
  

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• Raman Spectroscopic Speciation Analyses and Liquid Structures by High-Energy X-ray Total Scattering and Molecular Dynamics Simulations for N-methylimidazolium-Based Protic Ionic Liquids
  Hikari Watanabe; Hiroyuki Doi; Soshi Saito; Koichiro Sadakane; Kenta Fujii; Ryo Kanzaki; Yasuo Kameda; Yasuhiro Umebayashi
  BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, CHEMICAL SOC JAPAN, 89(8) 965 - 972, Aug. 2016, Scientific journal
  

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• Formation of stable cell-cell contact without a solid/gel scaffold: Non-invasive manipulation by laser under depletion interaction with a polymer
  Shu Hashimoto; Aoi Yoshida; Taeko Ohta; Hiroaki Taniguchi; Koichiro Sadakane; Kenichi Yoshikawa
  CHEMICAL PHYSICS LETTERS, ELSEVIER SCIENCE BV, 655 11 - 16, Jul. 2016, Scientific journal
• Synthesis and Applications of (ONO Pincer)Ruthenium-Complex-Bound Norvalines.
  Katsuhiro Isozaki; Tomoya Yokoi; Ryota Yoshida; Kazuki Ogata; Daisuke Hashizume; Nobuhiro Yasuda; Koichiro Sadakane; Hikaru Takaya; Masaharu Nakamura
  Chemistry, an Asian journal, 11(7) 1076 - 91, 05 Apr. 2016
  

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• Crystal structure induced by mixture of Water/Organic/antagonistic Salts
  Naomichi Ito; Koichiro Sadakane; Hiroaki Maki; Takahiro Kenmotsu
  2015 International Symposium on Micro-NanoMechatronics and Human Science, MHS 2015, Institute of Electrical and Electronics Engineers Inc., 21 Mar. 2016, International conference proceedings
  

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• Highly Concentrated Ethanol Solutions: Good Solvents for DNA as Revealed by Single-Molecule Observation
  Yuki Oda; Koichiro Sadakane; Yuko Yoshikawa; Tadayuki Imanaka; Kingo Takiguchi; Masahito Hayashi; Takahiro Kenmotsu; Kenichi Yoshikawa
  CHEMPHYSCHEM, WILEY-V C H VERLAG GMBH, 17(4) 471 - 473, Feb. 2016, Scientific journal
• Directional Photo-Transportation on Micro Solid Particles in a Solution: A Novel Application of Visible Laser
  S. Seo; H. Matsuura; K. Sadakane; K. Yoshikawa
  2016 INTERNATIONAL SYMPOSIUM ON MICRO-NANOMECHATRONICS AND HUMAN SCIENCE (MHS), IEEE, 2016, International conference proceedings
• 20pBW-6 Surfactant Molecules Behaving as Surface-Inactive Agents
  Sadakane K.; Hachiya M.; Fukao K.; Seto H.
  Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 71 3202 - 3202, 2016
  

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• 16aCU-5 Tranceportation of cm-sized solid substrate by laser
  koyoshi K.; Sadakane K.; Kenmotsu T.; Yoshikawa K.
  Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 70 2893 - 2893, 2015
  

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• Lamellar/Disorder Phase Transition in a Mixture of Water/2,6-Dimethylpyridine/Antagonistic Salt
  K. Sadakane; H. Endo; K. Nishida; H. Seto
  JOURNAL OF SOLUTION CHEMISTRY, SPRINGER/PLENUM PUBLISHERS, 43(9-10) 1722 - 1731, Oct. 2014, Scientific journal
  

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• Solvation dependence of valence electronic states of water diluted in organic solvents probed by soft X-ray spectroscopy
  Takashi Tokushima; Yuka Horikawa; Osamu Takahashi; Hidemi Arai; Koichiro Sadakane; Yoshihisa Harada; Yasutaka Takata; Shik Shin
  PHYSICAL CHEMISTRY CHEMICAL PHYSICS, ROYAL SOC CHEMISTRY, 16(22) 10753 - 10761, 2014, Scientific journal
  

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• Membrane formation by preferential solvation of ions in mixture of water, 3-methylpyridine, and sodium tetraphenylborate
  Koichiro Sadakane; Michihiro Nagao; Hitoshi Endo; Hideki Seto
  JOURNAL OF CHEMICAL PHYSICS, AMER INST PHYSICS, 139(23) 234905 , Dec. 2013, Scientific journal
  

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• Novel Ordered Structures in the Mixture of Water / Organic Solvent / Salts Investigated by Neutron Scattering
  貞包浩一朗
  HAMON, 「波紋」編集委員会, 23(3) 191-196 - 196, Aug. 2013
• The Effect of Tetraphenylphosphonium Chloride on Phase Behavior and Nanoscale Structures in a Mixture of D2O and 3-Methylpyridine
  Koichiro Sadakane; Yuka Horikawa; Michihiro Nagao; Hideki Seto
  CHEMISTRY LETTERS, CHEMICAL SOC JAPAN, 41(10) 1075 - 1077, Oct. 2012, Scientific journal
  

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• Aggregation of 1-dodecyl-3-methylimidazolium nitrate in water and benzene studied by SANS and H-1 NMR
  Toshiyuki Takamuku; Takuya Shimomura; Koichiro Sadakane; Mikiko Koga; Hideki Seto
  PHYSICAL CHEMISTRY CHEMICAL PHYSICS, ROYAL SOC CHEMISTRY, 14(31) 11070 - 11080, 2012, Scientific journal
  

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• Hydrogen bonding of water in 3-methylpyridine studied by O 1s X-ray emission and absorption spectroscopy
  Hidemi Arai; Yuka Horikawa; Koichiro Sadakane; Takashi Tokushima; Yoshihisa Harada; Yasunori Senba; Haruhiko Ohashi; Yasutaka Takata; Shik Shin
  PHYSICAL CHEMISTRY CHEMICAL PHYSICS, ROYAL SOC CHEMISTRY, 14(5) 1576 - 1580, 2012, Scientific journal
  

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• 電荷によって形成される溶液中の秩序構造
  瀬戸秀紀; 貞包浩一朗
  液晶, 16 279 , 2012
• Rheo-SANS experiments in France (ILL, D11) and Germany (FRM II, KWS1)
  貞包浩一朗
  Hamon, 22 28-31 , 2012
• 2D-Ising-like critical behavior in mixtures of water and 3-methylpyridine including antagonistic salt or ionic surfactant
  Koichiro Sadakane; Natsuki Iguchi; Michihiro Nagao; Hitoshi Endo; Yuri B. Melnichenko; Hideki Seto
  SOFT MATTER, ROYAL SOC CHEMISTRY, 7(4) 1334 - 1340, 2011, Scientific journal
  

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• Mesoscopic Structure in a Mixture of Water and Organic Solvent Induced by the Antagonistic Solvation Effect
  貞包浩一朗
  Hamon, 日本中性子科学会, 20(4) 286-291 - 291, 2010
• 塩の溶媒和効果により誘起された水/有機溶媒混合系における膜構造
  貞包浩一朗; 瀬戸秀紀
  機能材料, シーエムシー出版, 30(7) 20-24 - 24, 2010
• 塩によって誘起されるナノ構造
  瀬戸秀紀; 貞包浩一朗
  物理学会誌, 65(5) 349-352 , 2010
• Multilamellar Structures Induced by Hydrophilic and Hydrophobic Ions Added to a Binary Mixture of D2O and 3-Methylpyridine
  Koichiro Sadakane; Akira Onuki; Koji Nishida; Satoshi Koizumi; Hideki Seto
  PHYSICAL REVIEW LETTERS, AMER PHYSICAL SOC, 103(16) 167803 , Oct. 2009, Scientific journal
  

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• 2P-092 Multi-lamellar structures induced by hydrophilic and hydrophobic ions added to a binary mixture of water and organic solvent(Water, Hydration & Electrolyte,The 47th Annual Meeting of the Biophysical Society of Japan)
  Sadakane Koichiro; Onuki Akira; Nagao Michihiro; Nishida Koji; Endo Hitoshi; Koizumi Satoshi; Seto Hideki
  Seibutsu Butsuri, The Biophysical Society of Japan General Incorporated Association, 49 S120 , 2009
  

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• Rhythmic oscillation and dynamic instability of micrometer-size phase separation under continuous photon flux by a focused laser
  Koichiro Sadakane; Hiroyuki Kitahata; Hideki Seto; Kenichi Yoshikawa
  PHYSICAL REVIEW E, AMER PHYSICAL SOC, 78(4) 046214 , Oct. 2008, Scientific journal
  

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• Generation of multiple circular walls on a thin film of nematic liquid crystal by laser scanning
  M. Kojima; J. Yamamoto; K. Sadakane; K. Yoshikawa
  CHEMICAL PHYSICS LETTERS, ELSEVIER SCIENCE BV, 457(1-3) 130 - 133, May 2008, Scientific journal
  

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• 集光レーザーを用いた液晶配向場の操作
  小島正寛; 山本潤; 貞包浩一朗; 吉川研一
  液晶, 12 287-295 , 2008
• A periodic structure in a mixture of D2O/3-methylpyridine/NaBPh4 induced by solvation effect
  Koichiro Sadakane; Hideki Seto; Hitoshi Endo; Mitsuhiro Shibayama
  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, PHYSICAL SOC JAPAN, 76(11) 113602 , Nov. 2007, Scientific journal
  

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• Mesoscopic structure in near-critical mixtures of D2O and 3-methylpyridine with salts
  Koichiro Sadakane; Hideki Seto; Hitoshi Endo; Masahiro Kojima
  JOURNAL OF APPLIED CRYSTALLOGRAPHY, INT UNION CRYSTALLOGRAPHY, 40 S527 - S531, Apr. 2007, Scientific journal
  

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• Long-range periodic structure induced by coupling of the solvation effect and concentration fluctuation in water and 3-methylpyridine with salts
  K. Sadakane; H. Seto; M. Nagao
  CHEMICAL PHYSICS LETTERS, ELSEVIER SCIENCE BV, 426(1-3) 61 - 65, Jul. 2006, Scientific journal
  

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MISC

• Quantitative evaluation of DNA double-strand breaks induced by reactive oxygen through single molecule observation: protective effect of a natural polyphenol, chlorogenic acid
  小川遥士; 西尾天志; 吉川祐子; 吉川研一; 貞包浩一朗; 剣持貴弘
  日本化学会春季年会講演予稿集(Web), 102nd, 2022
• ミクロ液滴を利用したレーザーによる細胞集合体の構築
  宮崎幹; 岸本幹史; 貞包浩一朗; 剣持貴弘; 吉川研一
  応用物理学会秋季学術講演会講演予稿集(CD-ROM), 80th ROMBUNNO.19p‐PB1‐2 , 04 Sep. 2019
• レーザが誘起するグラファイト顆粒の並進粗密波:アルコール水溶液での実験
  長谷川よし乃; 田中智子; 鷹取慧; 貞包浩一朗; 剣持貴弘; 吉川研一
  日本物理学会講演概要集(CD-ROM), The Physical Society of Japan, 74(1) ROMBUNNO.17aS‐PS‐92 - 3191, 22 Mar. 2019
  

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• レーザが誘起するグラファイト粒子の並進疎密波
  長谷川よし乃; 田中智子; 鷹取慧; 剣持貴弘; 貞包浩一朗; 吉川研一
  日本物理学会講演概要集(CD-ROM), The Physical Society of Japan, 73(2) ROMBUNNO.11pM201‐11 - 2336, 21 Sep. 2018
  

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• 近赤外線レーザーによる細胞3D組織体の構築タンパク共存効果の検討
  宮崎幹; 山崎健広; 貞包浩一朗; 剣持貴弘; 吉川研一
  応用物理学会秋季学術講演会講演予稿集(CD-ROM), 79th ROMBUNNO.20p‐PA4‐23 , 05 Sep. 2018
  

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• Real space modeling of polymer shapes under congested environment
  Takatori Satoshi; Yoshikawa Hirotaka; Sadakane Koichiro; Yoshikawa Kenichi
  Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 73.2 2469 - 2469, 2018
  

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• How does antagonistic salt exhibit surfactant-like characteristics in water?
  Kyohei Doai; Takushi Higashiyama; Kazuma Nakajima; Ryo Kato; Takahiro Kenmotsu; Kenichi Yoshikawa; Koichiro Sadakane
  International Symposium on Micro-NanoMechatronics and Human Science, MHS 2018, Nagoya, Japan, December 9-12, 2018, IEEE, 1 - 4, 2018
  

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• Effect of PPh4Cl on micro-nano vesicles structure induced by antagonistic salts.
  Takushi Higashiyama; Kyohei Doai; Kazuma Nakajima; Ryo Kato; Takahiro Kenmotsu; Kenichi Yoshikawa; Koichiro Sadakane
  International Symposium on Micro-NanoMechatronics and Human Science, MHS 2018, Nagoya, Japan, December 9-12, 2018, IEEE, 1 - 5, 2018
  

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• Constructing stable cellular assemblies in the presence of biopolymer: Application of laser tweezing in a crowding medium.
  Takehiro Yamazaki; Koichiro Sadakane; Takahiro Kenmotsu; Kenichi Yoshikawa
  International Symposium on Micro-NanoMechatronics and Human Science, MHS 2018, Nagoya, Japan, December 9-12, 2018, IEEE, 1 - 4, 2018
• 身体のゆらぎの非線形特性:時間反転対称性の破れの抽出と評価
  馬場ひかり; 鷹取慧; 剣持貴弘; 貞包浩一朗; 吉川研一
  日本物理学会講演概要集(CD-ROM), 一般社団法人 日本物理学会, 72(2) ROMBUNNO.21aK10‐10 - 2402, 25 Sep. 2017
  

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• Phase Transition in A Single Giant DNA Molecule: Differences between 1-propanol and 2-propanol Aqueous Solutions
  MA Yue; YOSHIKAWA Yuko; SADAKANE Koichiro; KENMOTSU Takahiro; YOSHIKAWA Kenichi
  応用物理学会秋季学術講演会講演予稿集(CD-ROM), 78th ROMBUNNO.6p‐PB5‐7 , 25 Aug. 2017
  

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• 水/有機溶媒/NaBPh₄混合系で形成される多重膜小胞体に対するPPh₄Clの影響
  東山拓司; 土合恭平; 貞包浩一朗; 剣持貴弘; 吉川研一
  応用物理学会秋季学術講演会講演予稿集(CD-ROM), 78th ROMBUNNO.7a‐PB2‐6 , 25 Aug. 2017
  

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• 水/水系ミクロ相分離現象を活用した細胞集団の組織化
  山名悠補; 藤本直; 貞包浩一朗; 剣持貴弘; 吉川研一
  応用物理学会秋季学術講演会講演予稿集(CD-ROM), 78th ROMBUNNO.6p‐PB5‐5 , 25 Aug. 2017
  

  URL
• Phase transition in a single giant DNA molecule: Differences between 1-propanol and 2-propanol aqueous solutions
  MA Yue; YOSHIKAWA Yuko; SADAKANE Koichiro; KENMOTSU Takahiro; YOSHIKAWA Kenichi
  生物物理(Web), 57(Supplement 1-2) S207 (WEB ONLY) , 22 Aug. 2017
  

  URL
• Vectorial flow of phase-separated droplets in a mixture of water/organic solvent generated by a focused laser
  Shuto Kimura; Takehiro Minami; Koichiro Sadakane; Takahiro Kenmotsu
  2015 International Symposium on Micro-NanoMechatronics and Human Science, MHS 2015, Institute of Electrical and Electronics Engineers Inc., 1 - 4, 21 Mar. 2016
• Transportation of cm-sized solid substrate by laser
  K. Koyoshi; K. Sadakane; T. Kenmotsu; K. Yoshikawa
  2015 International Symposium on Micro-NanoMechatronics and Human Science, MHS 2015, Institute of Electrical and Electronics Engineers Inc., 1 - 4, 21 Mar. 2016
• The viscosity of the mixture of water / 2, 6-dimethylpyridine / NaBPh4 at lamellar phase and disordered phase
  Hiroaki Maki; Koichiro Sadakane; Takahiro Kenmotsu; Naomichi Ito; Kenichi SYoshikawa
  2015 International Symposium on Micro-NanoMechatronics and Human Science, MHS 2015, Institute of Electrical and Electronics Engineers Inc., 1 - 4, 21 Mar. 2016
• Action of newly developed tetrazolato-bridged dinuclear platinum(II) complexe as the candidate of effective antitumor drug on the structure of large DNA
  Shinsuke Masuoka; Yuta Shimizu; Yuko Yoshikawa; Seiji Komeda; Takahiro Kenmotsu; Koichiro Sadakane; Kenichi Yoshikawa
  2016 INTERNATIONAL SYMPOSIUM ON MICRO-NANOMECHATRONICS AND HUMAN SCIENCE (MHS), IEEE, 1 - 4, 2016
• Fluctuation of standing body: Large difference on the time-development between left/right and front/rear fluctuations
  Hikari Baba; Satoshi Takatori; Koichiro Sadakane; Takahiro Kenmotsu; Kenichi Yoshikawa
  2016 INTERNATIONAL SYMPOSIUM ON MICRO-NANOMECHATRONICS AND HUMAN SCIENCE (MHS), IEEE, 1 - 5, 2016
• Pendulum with cm-sized solid substrate Driven by laser
  Koyoshi K; Kenmotsu T; Yoshikawa K; Sadakane K
  Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, 71(0) 3079 - 3079, 2016
  

  DOI URL
• ONO-pincer ruthenium complex-bound norvaline for efficient catalytic oxidation of methoxybenzenes with hydrogen peroxide
  Ryota Yoshida; Katsuhiro Isozaki; Tomoya Yokoi; Nobuhiro Yasuda; Koichiro Sadakane; Takahiro Iwamoto; Hikaru Takaya; Masaharu Nakamura
  ORGANIC & BIOMOLECULAR CHEMISTRY, ROYAL SOC CHEMISTRY, 14(31) 7468 - 7479, 2016
  

  DOI URL
• 細胞にやさしい三次元細胞組織体構築の新手法
  剣持貴弘; 吉川研一; 貞包浩一朗
  クリーンテクノロジー, (26) 13 - 16, 2016
• 塩を含む混合溶液の不思議な臨界挙動：静的測定が示す2 次元Ising 的振る舞いと動的測定が示す3 次元Ising 的振る舞い
  貞包浩一朗
  溶液化学会ニュースレター, 43625 , 2015
• 軟X線分光による電子状態分析:有機溶媒中の水の相互作用による液体構造と電子状態変化
  徳島高; 堀川裕加; 貞包浩一朗; 高橋修; 辛埴, 辛埴
  放射線化学討論会講演要旨集, 56th 87 - 88, 24 Sep. 2013
• Surfactant molecules behaving as surface-inactive agents
  Sadakane Koichiro; Seto Hideki
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 68(2) 337 - 337, 26 Aug. 2013
• Novel Ordered Structures in the Mixture of Water / Organic Solvent / Salts Investigated by Neutron Scattering
  Koichiro Sadakane
  中性子科学会誌（波紋）, (23) 191 - 196, 2013
• 21pAK-9 Gel-like behaviors induced by shear flow in a mixture of water / organic solvent / salt
  Sadakane K.; Shibayama M.; Takeda M.; Inoue R.; Seto H.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 67(2) 354 - 354, 24 Aug. 2012
• 21pAK-7 Effect of adding salt on the lamellar structure of an aqueous solution of non-ionic surfactant
  Seto H.; Nagao M.; Sadakane K.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 67(2) 353 - 353, 24 Aug. 2012
• 21pAK-10 Electronic states of water in a mixture of water / organic solvent / salt observed by soft X-ray emission spectroscopy
  Horikawa Yuka; Sadakane Koichiro; Tokushima Takashi; Shin Shik
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 67(2) 354 - 354, 24 Aug. 2012
• 電荷によって形成される溶液中の秩序構造
  瀬戸秀紀; 貞包浩一朗
  日本液晶学会誌「液晶」, (16) 279 - 284, 2012
• Rheo-SANS experiments in France (ILL, D11) and Germany (FRM II, KWS1)
  Koichiro Sadakane
  中性子科学会誌（波紋）, (22) 28 - 31, 2012
• 27pGV-10 Gel-like behaviors induced by shear flow in the mixture of water/organic solvent/salt
  Sadakane K.; Shibayama M.; Takeda M.; Nishida K.; Seto H.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 66(1) 411 - 411, 03 Mar. 2011
• 28pGV-6 2D-Ising like behavior in a ternary liquid
  Sadakane K.; Iguchi N.; Nagao M.; Endo H.; Melnichenko Y. B.; Seto H.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 66(1) 422 - 422, 03 Mar. 2011
• 27pGV-8 Electronic states of water in D_2O/3MP/NaBPh4 mixture
  Horikawa Yuka; Sadakane Koichiro; Arai Hidemi; Tokkushima Takashi; Shin Shik
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 66(1) 410 - 410, 03 Mar. 2011
• 軟X線発光分光による溶液中の水の構造観測
  新井 秀実; 堀川 裕加; 貞包 浩一朗; 原田 慈久; 徳島 高; 高田 恭孝; 辛 埴
  放射光, 23(2) 116 - 117, 31 Mar. 2010
• 23aPS-95 Hierarchic structure induced by the solvation effect in water and organic solvent with salt
  Sadakane K.; Nagao M.; Endo H.; Osaka N.; Kawabata Y.; Seto H.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 65(1) 400 - 400, 01 Mar. 2010
• Mesoscopic Structure in a Mixture of Water and Organic Solvent Induced by the Antagonistic Solvation Effect
  Koichiro Sadakane
  中性子科学会誌（波紋）, (20) 286 - 291, 2010
• 塩の溶媒和効果により誘起された水/有機溶媒混合系における膜構造
  貞包浩一朗; 瀬戸秀紀
  月刊『機能材料』, (7月号) 20 - 24, 2010
• 塩によって誘起されるナノ構造
  瀬戸秀紀; 貞包浩一朗
  物理学会誌, (65) 349 - 352, 2010
• 25aQF-7 Hierarchic structure induced by the solvation effect in water and organic solvent with salt
  Sadakane K.; Onuki A.; Nagao M.; Endo H.; Nishida K.; Koizumi S.; Seto H.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 64(2) 248 - 248, 18 Aug. 2009
• 30aPS-107 Novel hierarchic structure induced by the solvation effect in water and 3-methylpyridine with salt
  Sadakane K.; Nagao M.; Nishida K.; Endo H.; Koizumi S.; Seto H.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 64(1) 389 - 389, 03 Mar. 2009
• 26pPSA-35 Electronic structure of water in organic solvent observed by x-ray emission spectroscopy
  Horikawa Y; Arai H; Sadakane K; Tokushima T; Harada Y; Hiraya A; Shin S
  Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 64(0) 277 - 277, 2009
• 21pWB-4 Long-range periodic structure induced by the solvation effect in water and 3-methylpyridine with salts
  Sadakane K.; Seto H.; Endo H.; Nagao M.; Koizumi S.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 63(2) 314 - 314, 25 Aug. 2008
• 23pYC-7 Long-range periodic structure induced by the salvation effect in water / organic solvent
  Sadakane Koichiro; Seto Hideki; Endo Hitoshi
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 63(1) 355 - 355, 29 Feb. 2008
• 集光レーザーを用いた液晶配向場の操作
  小島正寛; 山本潤; 貞包浩一朗; 吉川研一
  日本液晶学会誌「液晶」, (12) 287 - 295, 2008
• Young Voice
  貞包 浩一朗; 堀川 裕加
  Seibutsu Butsuri, The Biophysical Society of Japan General Incorporated Association, 47(6) 410 - 411, 25 Nov. 2007
  

  DOI URL
• 23pRJ-12 Dynamical behavior of micro phase separation induced by a focal laser
  Sadakane K.; Seto H.; Kitahata H.; Yoshikawa K.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 62(2) 376 - 376, 21 Aug. 2007
• 20pTC-11 Controlling Topological Defect in Nematic Liquid Crystal with Focused Laser
  Kojima M.; Yamamoto J.; Sadakane K.; Yoshikawa K.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 62(1) 355 - 355, 28 Feb. 2007
• 20pPSA-7 Interfacial instability of micro phase separation induced by a focused laser
  Sadakane Koichiro
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 62(1) 358 - 358, 28 Feb. 2007
• 25aWG-11 Formation of multiple ring-like wall in Nematic Liquid Crystal with focused laser beam
  Kojima M.; Yamamoto J.; Sadakane K.; Yoshikawa K.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 61(2) 274 - 274, 18 Aug. 2006
• 26pWG-7 Dynamical behavior of micro phase separation induced by a focal laser
  Sadakane K.; Seto H.; Koga N.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 61(2) 289 - 289, 18 Aug. 2006
• 29pTH-3 Long range periodic structure induced by a coupling of solvation and density fluctuation near the critical point
  Sadakane K.; Seto H.; Nagao M.
  Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 61(1) 380 - 380, 04 Mar. 2006
• Long-range periodic structure induced by coupling of the solvation effect and concentration fluctuation in water and 3-methylpyridine with salts :
  Sadakane Koichiro; Seto Hideki; Nagao Michihiro
  物性研究, 物性研究刊行会, 87(1) 176 - 177, 2006

Books etc

• Molecular basics of liquids and liquid-based materials
  監修:Katsura Nishiyama, Tsuyoshi Yamaguchi, Toshiyuki Takamuku, Norio Yoshida, 分担執筆: Koichiro Sadakane
  Springer, 2021, Contributor, Effects of Antagonistic Salts on Critical Behavior and Order Formation of Soft Matter
• 材料表面の親水・親油の評価と制御設計
  監修; 石井淑夫; 分担執筆; 貞包浩一朗, 牧広祥
  テクノシステム, 2016, Contributor, 水/有機溶媒/塩の混合溶液で見られる新奇な臨界現象と秩序構造

Presentations

• 密度差ゼロの水と油はどのように混ざるのか
  貞包浩一朗; 荒木田怜那; 後藤篤子; 藤井愛子
  第45回溶液化学シンポジウム, 19 Oct. 2023, 18 Oct. 2023, 20 Oct. 2023
• 密度差ゼロの水と油はどのように混ざるのか
  貞包浩一朗; 荒木田怜那; 後藤篤子; 藤井愛子
  日本物理学会 第78回年次大会, 18 Sep. 2023, 16 Sep. 2023, 19 Sep. 2023
• Ordered Structures in a mixture of water/organic solvent induced by antagonisitic salts
  Koichiro Sadakane
  International Congress on Pure & Applied Chemistry, 14 Sep. 2023, 12 Sep. 2023, 17 Sep. 2023
• Membrane Formation in Liquids by Adding an Antagonistic Salt
  Koichiro Sadakane
  9th International Discussion Meeting on Relaxations in Complex Systems, 18 Aug. 2023, 12 Aug. 2023, 18 Aug. 2023
• 密度差0近傍の水と油の混合：密度変化に伴う混合状態の不連続な分岐
  荒木田怜那; 後藤篤子; 藤井愛子; 貞包浩一朗
  第73回コロイドおよび界面化学討論会, 20 Sep. 2022, 20 Sep. 2022, 22 Sep. 2022
• 水/水ミクロ相分離によるモデル細胞の自己創製
  貞包浩一朗; 作田浩輝; 藤田ふみか; 剣持貴弘; 吉川研一
  2019年度ハリス理化学研究所研究発表会, 26 Nov. 2019, 26 Nov. 2019, 26 Nov. 2019
• 界面不活性の働きをする界面活性剤
  貞包浩一朗; 蜂屋昌樹; 土合恭平; 深尾浩次
  コロイドおよび界面化学討論会, 18 Sep. 2018, 18 Sep. 2018, 20 Sep. 2018
• 近赤外レーザーを活用した細胞3D組織化：ミニ臓器構築に向けての新手法
  貞包浩一朗; 谷口浩章; 辻翔都; 山崎健広; 吉田葵; 剣持貴弘; 吉川研一
  日本物理学会2018年秋季大会, 10 Sep. 2018, 09 Sep. 2018, 12 Sep. 2018
• やわらかな物質の秩序形成： 光と中性子を用いた本質の探究
  貞包浩一朗
  山口大学研究推進体「先端的計測・分析基盤技術の創出 × 物質構造解析研究会」, 28 Aug. 2018, 28 Aug. 2018, 28 Aug. 2018
• 近赤外レーザーを活用した細胞3D組織化：ミニ臓器構築に向けての新手法
  貞包浩一朗
  BIO tech アカデミックフォーラム, 29 Jun. 2018, 27 Jun. 2018, 29 Jun. 2018, Oral presentation
• 拮抗的な塩は水中でどれだけ界面活性剤に近い振舞いをするか
  貞包 浩一朗
  日本中性子科学会第１７回年回, 2017
• 水/有機溶媒/塩の混合溶液で形成される結晶構造
  貞包 浩一朗
  第40回溶液化学研究会, 2017
• 中性子散乱と光ピンセットを用いたソフトマテリアルの秩序形成の研究
  貞包 浩一朗
  第35回関西界面科学セミナー, 2017
• 塩によって誘起される液体の階層的秩序
  貞包 浩一朗
  電気化学会第84回大会, 2017,
• Surfactant Molecules Behaving as Surface-Inactive Agents
  SADAKANE Koichiro
  4th International Soft Matter Conference, 2016
• Surfactant Molecules Behaving as Surface-Inactive Agents
  SADAKANE Koichiro
  "日本化学会 第96春季年 会", 2016
• 界面活性剤が誘起する 水/有機溶媒混合系の相分離
  貞包 浩一朗
  日本物理学会２０１６年春季大会, 2016
• 拮抗的な塩や局所レーザー場によって誘起される溶液の新しい秩序構造に関する研究
  貞包 浩一朗
  第39回溶液化学シンポジウム, 2016
• 中性子散乱と光ピンセットを用いた ソフトマテリアルの秩序形成の研究
  貞包 浩一朗
  "「分子を使った寄せ木細工」 〜自己組織化したソフトマテリアルが織りなす「かたち」と機能", 2016
• Surfactant Molecules Behaving as Surface-Inactive Agents
  SADAKANE Koichiro
  16th International Small Angle Scattering Conference 2015, 2015
• Surfactant Molecules Behaving as Surface-Inactive Agents
  SADAKANE Koichiro
  The EMLG/JMLG (European/Japanese Molecular Liquids Group) annual meeting 2015, 2015
• Gel-Like Behaviors in a Mixture of Water / Organic Solvent / Antagonistic Salt Induced by Flow
  SADAKANE Koichiro
  International Symposium on Fluctuation and Structure out of Equilibrium 2015, 2015
• 時空間秩序の生成：生物系・非生物系両面からのアプローチ
  貞包 浩一朗
  ゆらぎと構造の協奏、第2回公開シンポジウム, 2015
• コロイド溶液中で形成される細胞膜状構造の秩序化のメカニズムの解明
  貞包 浩一朗
  私立大学戦略的研究基盤形成事業 「細胞自在操作のための分子化学技術の開発拠点形成」スタートアップ講演会, 2015
• The Effect of Antagonistic Salts or Surfactants on a Mixture of Water / Organic Solvent
  SADAKANE Koichiro
  International Symposium: Hierarchical Structures and Dynamics at Soft Interfaces - from surfactants, cells to peacock's train -, 2015
• Hierarchical structures induced by antagonistic salts in a mixture of water / organic solvent
  SADAKANE Koichiro
  Soft Matter at Interfaces 2015, 2015
• Surfactant Molecules Behaving as Surface-Inactive Agents
  SADAKANE Koichiro
  The 14th Korea-Japan Meeting on Neutron Science, 2015
• 界面不活性の働きをする界面活性剤
  貞包 浩一朗
  第4回高分子物理学研究会, 2014
• ずり流動場中における水/有機溶媒/塩混合溶液のゲル的振舞い
  貞包 浩一朗
  日本化学会第94春季年会(2014), 2014
• 界面不活性の働きをする界面活性剤
  貞包 浩一朗
  物性研短期研究会「海外施設を舞台とした中性子散乱共同利用研究」, 2014
• 中性子散乱法によるコロイドの秩序形成の研究： 振ったら固まる液体や、 界面 不活性性を示す界面活性剤溶液について
  貞包 浩一朗
  第37回溶液化学シンポジウム・プレシンポジウム, 2014
• Surfactant Molecules Behaving as Surface-Inactive Agents
  貞包 浩一朗
  The 6th Taiwan-Japan Joint Meeting on X-ray and Neutron Scattering, 2014
• Gel-like behaviors in a mixture of water / organic solvent / salt induced by shear flow
  SADAKANE Koichiro
  Workshop on Non-Equilibrium Complex Fluids, 2014
• 塩を含む混合溶液系で見られる新しい秩序構造 ～ SPring-8での成果を中心に
  貞包 浩一朗
  SPRUC拡大研究会・SPring-8利用ワークショップ, 2014
• 界面不活性の働きをする界面活性剤
  貞包 浩一朗
  日本物理学会２０１３年秋季大会, 2013
• 流動場が誘起する水/有機溶媒/塩混合溶液の高分子ゲル的な振舞い
  貞包 浩一朗
  第3回高分子物理学研究会, 2013
• 界面不活性の働きをする界面活性剤
  貞包 浩一朗
  第8回先進原子力科学技術に関する連携重点研究討論会および原子力機構施設利用一般共同研究、原子力専攻施設共同利用（弥生研究会）成果報告会, 2013
• 塩が誘起する水/有機溶媒混合溶液の新しい秩序構造
  貞包 浩一朗
  塩が誘起する水/有機溶媒混合溶液の新しい秩序構造, 2013
• 拮抗的な塩が誘起する液体の階層的秩序構造
  貞包 浩一朗
  SPring-8シンポジウム2013：ソフト界面科学研究会, 2013
• Periodic distribution of ions confirmed by contrast matching small-angle neutron scattering in water, organic solvent, and salts
  SADAKANE Koichiro
  The 5th Japan-Taiwan Joint Meeting on Neutron and X-ray Scattering, 2013
• Periodic distribution of ions confirmed by contrast matching small-angle neutron scattering in water, organic solvent, and salts
  SADAKANE Koichiro
  The 12th Korea-Japan Meeting on Neutron Science, 2013
• "Periodic Distribution of Ions Confirmed by Contrast Variation Small-Angle Neutron Scattering in Water, 2,6-Lutidine, and NaBPh4 Mixture"
  SADAKANE Koichiro
  15th International Small Angle Scattering Conference 2012, 2012
• 2D-Ising-Like Critical Behavior in Mixtures of Antagonistic Salt or Ionic Surfactant
  SADAKANE Koichiro
  15th International Small Angle Scattering Conference 2012, 2012
• ずり流動場中における水/有機溶媒/塩混合溶液のゲル的振舞い
  貞包 浩一朗
  日本物理学会２０１２年秋季大会, 2012
• 2D-Ising-like critical behavior in a mixture of water/3-methylpyridine including antagonistic salts
  SADAKANE Koichiro
  The EMLG/JMLG (European/Japanese Molecular Liquids Group) annual meeting 2012, 2012
• 中性子散乱による水/有機溶媒/塩混合溶液系の新秩序構造の解明
  貞包 浩一朗
  日本中性子科学会第１２回年会, 2012
• Small-Angle Neutron Scattering and Soft X-ray Emission Study of Water / Organic Solvent / Antagonistic Salt
  SADAKANE Koichiro
  The EMLG/JMLG (European/Japanese Molecular Liquids Group) annual meeting 2011, 2011
• Mesoscopic Structures Induced by the Solvation Effect of Antagonistic Salts in the Mixture of Water/ Organic Solvent
  SADAKANE Koichiro
  32nd International Conference on Solution Chemistry, 2011
• 塩が誘起する液体の秩序構造
  貞包 浩一朗
  第１０回化学・材料セミナー, 2011
• 塩が誘起する水／有機溶媒混合系の階層的秩序
  貞包 浩一朗
  液体・非晶質材料分科会ユーザーズグループミーティング, 2011
• Crossover from 3D-Ising to 2D-Ising critical behavior induced by the solvation effect of salt in the mixture of water and organic solvent
  SADAKANE Koichiro
  The 2010 International Chemical Congress of Pacific Basin Societies, 2010
• Soft X-ray Emission Study of Water / 3-methylpyridine / NaBPh4
  SADAKANE Koichiro
  "JST ERATO and CREST Joint Symposium Future Trend in Softmaterial Research with Advanced Light Source ~Interdisciplinary of Bio- & Synthetic- Materials and Industrial Transferring~", 2010
• Mesoscopic structure in a mixture of water/acetonitrile/NaBPh4 induced by solvation effect: small-angle neutron scattering investigation by applying contrast variation technique
  SADAKANE Koichiro
  International Symposium on Non-Equilibrium Soft Matter 2010, 2010
• Rhythmic oscillation and dynamic instability of micrometer-sized phase-separation under continuous photon-flux by a focused laser
  SADAKANE Koichiro
  "Gordon Research Conferences Gordon Research Conferences ~Oscillations & Dynamic Instabilities in Chemical Systems~", 2010
• 水/有機溶媒/塩混合系の秩序に対する圧力の効果
  貞包 浩一朗
  日本物理学会２０１０年春季大会, 2010
• Multilamellar Structures Induced by Hydrophilic and Hydrophobic Ions Added to a Binary Mixture of D2O and Organic Solvent
  SADAKANE Koichiro
  The 4th Japan-Taiwan Joint Meeting on Neutron and X-ray Scattering, 2010
• 水/有機溶媒/塩混合系での秩序： 組成比の違いや外場に対する影響について
  貞包 浩一朗
  つくばソフトマター研究会２０１０, 2010
• 水/有機溶媒の組成揺らぎに対するSANS解析
  貞包 浩一朗
  第１回中性子小角散乱解析法研究会, 2010
• Nano-scale structure in the mixture of water / organic solvent / NaBPh4 induced by solvation effect: small-angle neutron scattering investigation by means of contrast variation technique
  SADAKANE Koichiro
  International Conference on Nanoscopic Colloid and Surface Science, 2010
• イオンの選択溶媒和による膜構造形成
  貞包 浩一朗
  日本物理学会２００９年秋季大会, 2009
• Multi-lamellar structure induced by hydrophilic and hydrophobic ions added to a binary mixture of water and organic solvent
  SADAKANE Koichiro
  XIV International Conference on Small-Angle Scattering, 2009
• Multi-lamellar structures induced by hydrophilic and hydrophobic ions added to a binary mixture of water and organic solvent
  SADAKANE Koichiro
  The EMLG/JMLG (European/Japanese Molecular Liquids Group) annual meeting 2009, 2009
• Hierarchical structures induced by solvation effects of hydrophilic/hydrophobic ion pair in the mixture of water and organic solvent
  SADAKANE Koichiro
  International Conference on Neutron Scattering 2009, 2009
• 溶媒和効果による水/有機溶媒混合系の新しい秩序
  貞包 浩一朗
  日本物理学会２００９年春季大会, 2009
• Hierarchical structure induced by solvation effects of hydrophilic/hydrophobic ion pair in the mixture of water and 3-methylpyridine
  貞包 浩一朗
  The 3rd Mini-Symposium on Liquids, 2009
• 塩の溶媒効果による水/有機溶媒混合系の膜状構造
  貞包 浩一朗
  つくばソフトマター研究会２００９（ミニ研究会「溶媒和の物理と化学」）, 2009
• Long-priod structure induced by solvation effect in the mixture of water and organic solvent
  SADAKANE Koichiro
  JULICH SOFT MATTER DAYS 2008, 2008
• 溶媒和効果による水/有機溶媒混合系の新しい秩序
  貞包 浩一朗
  日本物理学会２００８年秋季大会, 2008
• 溶媒和効果による水/有機溶媒混合溶液の長距離秩序
  貞包 浩一朗
  第６１回コロイドおよび界面化学討論会, 2008
• 溶媒和効果による水/有機溶媒混合系の長距離秩序
  貞包 浩一朗
  非平衡ソフトマター物理学の創成：メソスコピック系の構造とダイナミクス 第２回ソフトマター物理若手勉強会, 2008
• ２成分混合系＋塩における溶媒和効果による秩序化
  貞包 浩一朗
  「非平衡ソフトマター物理学の創成」の電荷・極性の関与するソフトマターの新しい相、及びせん断の関与する非平衡現象の研究班の班会議, 2008
• Dynamic instability and rhythmic oscillation of micro phase separation under focused laser
  SADAKANE Koichiro
  International Symposium on Non-Equilibrium Soft Matter, 2008
• 溶媒和効果による２成分混合溶液の長距離秩序
  貞包 浩一朗
  日本物理学会２００８年春季大会, 2008
• 溶媒和効果による2成分混合溶液の新しい秩序
  貞包 浩一朗
  非平衡ソフトマター物理学の創成：メソスコピック系の構造とダイナミクス 第２回シンポジウム, 2008
• 溶媒和効果による水/3-methylpyridine/NaBPh4混合溶液のメゾスコピック構造
  貞包 浩一朗
  日本中性子科学会第７回年次大会, 2007
• Dynamic Instability and Rhythmic Oscillation of Micro Phase Separation under a Focused IR Laser
  SADAKANE Koichiro
  30th Symposium on Solution Chemistry of Japan, 2007
• レーザー場誘起ミクロ相分離：動的界面不安定性と生成・消滅振動
  貞包 浩一朗
  日本物理学会２００７年秋季大会, 2007
• Dynamic Instability and Rhythmic Oscillation of Micro Phase Separation under a Focused IR Laser
  SADAKANE Koichiro
  International Conference of Solution Chemistry, 2007
• 局所誘電場におけるミクロ相分離液滴の動的界面不安定性
  貞包 浩一朗
  非平衡ソフトマター物理学の創成：メソスコピック系の構造とダイナミクス第２回領域研究会, 2007
• Interfacial Instability and Rhythmical Oscillation of Micro Phase Separation Induced by a Focused Laser
  SADAKANE Koichiro
  International mini-symposium on liquids, 2007
• レーザー場誘起相分離液滴の動的界面不安定性
  貞包 浩一朗
  日本物理学会２００７年春季大会, 2007
• 局所誘電場によるミクロ相分離液滴の時空間構造
  貞包 浩一朗
  日本物理学会２００６年秋季大会, 2006
• 局所レーザー場により誘起されるミクロ相分離の動的挙動
  貞包 浩一朗
  第５９回コロイドおよび界面化学討論会, 2006
• Long range periodic structure induced by a coupling of solvation and density fluctuation near the critical point of water/3-methylpyridine/salt system
  SADAKANE Koichiro
  International Conference on Small-Angle Scattering 2006, 2006
• Long-range periodic structure induced by a coupling of solvation and density fluctuation near the critical point of water/3MP/salt system
  SADAKANE Koichiro
  Korea-Japan Meeting on Neutron Science, 2006
• 2成分混合流体の臨界点近傍での濃度揺らぎと溶媒和のカップリングによる長距離秩序の形成
  貞包 浩一朗
  日本物理学会２００６年春季大会, 2006
• 時空間秩序の生成：生物系・非生物系両面からのアプローチ
  貞包 浩一朗
  ゆらぎと構造の協奏、第2回公開シンポジウム, 2005

Research Projects

• 高圧条件下における混合溶媒系の臨界普遍性と隠れた長距離相互作用の解明
  貞包 浩一朗
  本研究では、4000気圧までの高圧条件下における混合溶液系の臨界普遍性の解明を目指している。その中で、(1)溶液のマイクロメートルスケールの構造の解明のため「光散乱」、(2)ナノメートルスケールの構造解明のために「小角中性子散乱実験」を行う必要がある。2021年度はこれらの準備と予備実験を行い、以下の成果を得た。 (1) 光散乱実験で使用可能な高圧装置の設計・製作 高圧条件下での溶液の物性をマイクロメートルの空間スケールで明らかにするする手法として、本研究計画ではレーザー光（波長532nm、強度500mW）を用いた「光散乱実験」を行う。ここでは液体に4000気圧の高圧力を与えつつ、液体内部にレーザービームを透過させる必要があるが、この目的に合致した装置は市販されていない。そこで2021年度は、高圧条件下での光散乱実験を行うための装置のデザイン（設計）を行った。ここでの設計案をもとに、圧力装置を取り扱うメーカーとして「竹田理化株式会社」「株式会社テクメイション」の2社に製作を依頼し、2022年2月10日までに全てのパーツが納品された。さらにい、これらのパーツを組み上げ動作確認を行ったところ、3000気圧の高圧条件までは機器が正しく動作することを確認した。 (2) 高圧環境下における小角中性子散乱実験 高圧環境下での溶液のナノ構造を観測するため、日本原子力研究開発機構（茨城県東海村）にて、小角中性子散乱実験を進めている。2021年度は、中性子散乱装置に組み込む高圧機器を用いて予備実験を行い、3000気圧までの高圧条件を達成することができた。下における溶液の構造を、1ナノメートル程度の分解能で観測することに成功した。2022年度も引き続き小角中性子散乱実験を行い、4000気圧までの高圧環境下における溶液のナノ構造の解明を目指す予定である。, 日本学術振興会, 科学研究費助成事業, 2021/04 -2024/03, 基盤研究(C), 同志社大学
• Long-range ordered structure and 2D-Ising like critical behaviors induced by salts in organic solvent solutions
  SADAKANE Koichiro
  Small-angle neutron scattering (SANS), static light scattering (SLS), and dynamic light scattering (DLS) experiments were performed to clarify the effect of antagonistic salts on the critical phenomena of water/organic solvent mixtures. SANS and SLS results showed that antagonistic salts induce a highly order structure, so-called "charge-density-wave structure", in water/2,6-dimethylpyridine, water/2-butoxyethanol, water/acetonitrile mixtures. Furthermore, it was found that the critical universality changed from 3D Ising to 2D Ising with the addition of salt in these mixed solutions, On the other hand, it was also clarified that the dynamic properties of the solution obtained by DLS are not affected by the salt. In addition, the Intramolecular interaction in the "highly ordered concentration fluctuation phase" was observed by NMR, and it was suggested that the intramolecular interactions between water and organic solvent do not change significantly even in the presence of salts., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2018/04 -2022/03, Grant-in-Aid for Scientific Research (C), Doshisha University
• Organic solvent solutions behaving like surfactants or polymer gels
  Sadakane Koichiro; Seto Hideki
  Ternary mixtures, composed of water, organic solvent, and antagonistic salts, behaves as surfactant mixtures or polymer solutions depending on the conditions of the solution; in some cases, multilamellar vesicles are generated in the mixture. In addition, the mixture shows shear thickening under shear flow field. In this study, we clarified the origin of these surfactants or polymer-gel like behavior in the mixture containing antagonistic salts. Specifically, we investigated the solvation states of Na+ and BPh4- ions in the mixture by Raman spectroscopy and NMR.In addition, we investigated the effect of shear flow on the mixture by using small-angle neutron scattering with rheometer., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2015/04 -2019/03, Grant-in-Aid for Scientific Research (C), Doshisha University
• Dynamical heterogeneity measured for multi-layered thin polymer films
  Fukao Koji; DIDIER LONG; Paul Sotta
  1. The glass transition temperature (Tg) was investigated during annealing above Tg for stacked thin films of poly(methyl methacrylate) (PMMA). The Tg of as-stacked PMMA thin films exhibits thin-film-like behavior, insofar as Tg is depressed and the dynamics of the α process are faster than those of the bulk system. Annealing at high temperature causes Tg to increase from the reduced value approaching those of the bulk. 2. We investigate the relaxation of thin films of a polyamide random copolymer. Two dielectric signals are observed at high temperatures, the α process and the electrode polarization (EP) process. The relaxation time and the dielectric relaxation strength of the EP process are described by a linear function of the film thickness d for large values of d. Furthermore, there is distinct deviation from this linear law for thickness smaller than a critical value, which suggests that there is an increase in the diffusion constant of the charge carriers for the EP process., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2013/04 -2017/03, Grant-in-Aid for Scientific Research (B), Ritsumeikan University
• Soft X-ray emission spectroscopy of nanoconfined water
  Horikawa Yuka; TOKUSHIMA Takashi; SADAKANE Koichiro
  We have investigated the hydrogen bonding states of nano-confined water by using Soft X-ray emission spectroscopy. It is known that XES spectrum of water shows a split of the lone-pair (1b1) peak which has been interpreted as arising from structures with distorted hydrogen bonds (1b1'') and from tetrahedrally hydrogen-bonded structures (1b1'). We found the relative population of 1b1’ peak decreased along with a decrease of the micelle size, that is, the hydrogen bonding of water molecules confined in the reverse micelle becomes weaker than that of bulk water when a diameter of the reverse micelle is around 2 nm., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2014/02 -2016/03, Grant-in-Aid for Young Scientists (B)
• Hierarchical structure of soft matter induced by electrostatic interaction
  Seto Hideki; ARAKI Takeaki; ONUKI Akira; SADAKANE Koichiro
  Electrostatic interaction plays a dramatic role in ordering and structural formations of soft matter. We have shown an ordered lamellar structure is induced in a mixture of water and an organic solvent such as 3-methylpyridine by adding antagonistic salt composed of hydrophilic cation and hydrophobic anion. The heterogeneous distribution of cations and anions due to preferential salvation and the electrostatic interaction between these ions could be thought as the origin of the lamellar formation. Here we have investigated the effects of electrostatic interaction in soft matter such as liquids, surfactant membranes, polymers, Janus particles, liquid crystals, colloids, nano bubbles, and showed various aspects concerning the electrostatic interaction., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2011/04 -2016/03, Grant-in-Aid for Scientific Research (A), High Energy Accelerator Research Organization
• Effective temperature of polymer supercooled liquid under flow
  FUKAO Koji; SADAKANE Koichiro; FUJII Yosuke
  We developed optical tweezers system in order to measure effective temperature of the non-equilibrium glassy system. First, we built up measurement system as follows: 1) Polarized beam splitter and half-wavelength plate were inserted into optical path to acquire the availability of two laser paths. We confirmed that two different particles could be optically trapped on independent locations. Furthermore, it became also possible to control the position of the trapped particle as we like. 2) We built up the system by which we can observe thermal motions of trapped particles using quadrant photo diodes. With this system, we could obtain spacial and temporal resolution of 10 nm and 10μs. To our regret, we have not yet attained the final destination until now. Even after finishing the planed research period, we shall continue this research project. We will try to do micro rheology experiment to measure effective temperature quantitatively and will discuss the observed results., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2013/04 -2015/03, Grant-in-Aid for Challenging Exploratory Research, Ritsumeikan University
• Surfactant molecules behaving as surface-inactive agents
  SADAKANE Koichiro
  It is well-known that surfactant molecules adsorb at the interface between water and oil, and the mutual solubility of water and oil increases since the interfacial tension decreases. However, we recently discovered that the mutual solubility of water and 2,6-dimethylpyridine or acetonitrile decreases when non-ionic surfactant, C12E5, is dissolved. That is, C12E5 behaves as "surface-inactive" agents in these mixtures. In order to clarify the origin of this phenomena, we performed small-angle neutron scattering (SANS) experiment on a mixture of water / 2,6-dimethylpyridine / C12E5 or water / acetonitrile / C12E5. The SANS data suggested that membrane structures composed of C12E5, i.e., bilayer structures or micelle structures, are formed in mixtures. These memranes should preferentially attract water molecules, and this results in the decrease of the mutual solubility of water and organic solvent., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2013/04 -2015/03, Grant-in-Aid for Young Scientists (B), Ritsumeikan University
• 塩が誘起する液体の階層的秩序構造
  笹川科学研究助成, 2011/04 -2013/03, Competitive research funding
• 電場による液体の新しい秩序:平衡、非平衡条件下における構造とダイナミクス
  貞包 浩一朗
  水/有機溶媒などの2成分混合溶液に塩を添加した系は、塩濃度に応じて臨界挙動の異常やミクロクラスターの形成が観測されるなど、古くから様々な現象が指摘されている。これら現象の多くは電離したイオンが周囲の極性溶媒を引き付ける効果(溶媒和効果)により解釈されているものの、未解決の点も多い。平成21年度申請者は、水と3-メチルピリジンの混合溶液に疎水性の陰イオンを持つ塩であるNaBPh4を加えた系を用いて中性子散乱実験を行い、メゾスケールの構造とダイナミクスについて詳しく調べた。 そ結果、3MPに対する水の体積分率を0.89～0.92となるように混合させた場合、100Å程度の周期を持っラメラ構造(T<318K)や無秩序構造(T>318K)が形成されることが分かった。更に、これらの相における小角散乱のデータについて解析を行ったところ、有機溶媒である3MPが厚さ10Å程度の膜として振る舞い、それが100Å周期で積層することでラメラ構造を形成していることが分かった。また、中性子スピンエコーの結果から、3MPで形成された膜は10ナノ秒程度の時間スケールで波打ち運動をしていることも分かった。 以上の結果は、Physical Review Letters誌に掲載された(K.Sadakane, A.Onuki, K.Nishida, S.Koizumi and H.Seto, Phys.Rev.Lett., 103, 106873(2009))。また、EMLG-JMLG annual meeting 2009(オーストリア)や日台中性子&X線研究会(台湾)などの国際学会にて招待講演を行い、今後の発展性などについて議論した。, 日本学術振興会, 科学研究費助成事業, 2007 -2009, 特別研究員奨励費, 京都大学

Teaching Experience

• Advanced Course in Experimental Physics Ⅱ
  Ritsumeikan University
• 物理学特別実験Ⅱ
  立命館大学
• Advanced Course in Experimental Physics Ⅰ
  Ritsumeikan University
• 物理学特別実験Ⅰ
  立命館大学
• Thesis
  Ritsumeikan University
• 卒業研究
  立命館大学
• Experimental physics
  Ritsumeikan University
• 実験物理学講義
  立命館大学
• Introduction to Experimental Physics
  Ritsumeikan University
• 実験物理学セミナー
  立命館大学
• Elementary Course in Experimental
  Ritsumeikan University
• 基礎物理学実験
  立命館大学