Motion, interaction, and hydrodynamic description of active soft materials

• Project/Area Number: 17K05605
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biological physics/Chemical physics/Soft matter physics
• Research Institution: Tohoku University
• Principal Investigator: Yoshinaga Natsuhiko 東北大学, 材料科学高等研究所, 准教授 (90548835)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: アクティブマター / ソフトマター / 生物物理 / 流体力学 / 非線形ダイナミックス / 非平衡物理 / 細胞運動 / 相転移 / 液晶 / 非線形 / マランゴニ効果

Outline of Final Research Achievements

Active soft materials are the field studying the mechanism of self-propelled particles and their collective behaviours. They demonstrate cooperative behaviours in non-equilibrium states through dissipation of internal energy to their environment. Cell motility is a typical example. Although several models have been proposed, analyses on interactions between particles and collective behaviours are difficult in the presence of the hydrodynamic interaction. We computed the effective interaction between self-propelled particles and clarified hydrodynamic modes of active matters. We have also studied the model of cell motility and showed that inhomogeneity of the active stress gives rises to spontaneous motion.

Academic Significance and Societal Importance of the Research Achievements

アクティブマターは、平衡状態のような自由エネルギーが一般的には存在しないため、その集団の振る舞いを直感的に予想することは困難である。本研究では、実効的な相互作用を計算することで、配向相互作用の有無を解析することができる。また、双極子的なアクティブストレスの不均一性から生じる四重極子的な力の場によって自己駆動が起きることから、どのような分布が自己駆動に重要な役割を果たすのかを明らかにした。最近は、自己駆動粒子を化学反応を用いて実現することが可能になってきており、目的の場所に粒子を輸送するなどのスマート材料の基礎付けとして意義があると考えている。

Research Products

• [Int'l Joint Research] Bristol University/Sheffield University(英国)
• [Int'l Joint Research] ブリストル大学(英国)
• [Int'l Joint Research] Bristol University(英国)
• [Journal Article] Self-propulsion of an active polar drop (2019)
  • Author(s): Yoshinaga Natsuhiko
  • Journal Title: The Journal of Chemical Physics Volume: 150 Issue: 18 Pages: 184904-184904
  • DOI: 10.1063/1.5090790
  • NAID: 130008153191
  • Peer Reviewed
• [Journal Article] Cell-sized confinement controls generation and stability of a protein wave for spatiotemporal regulation in cells (2019)
  • Author(s): Kohyama Shunshi、Yoshinaga Natsuhiko、Yanagisawa Miho、Fujiwara Kei、Doi Nobuhide
  • Journal Title: eLife Volume: 8
  • DOI: 10.7554/elife.44591
  • Peer Reviewed / Open Access
• [Journal Article] Large-scale chirality in an active layer of microtubules and kinesin motor proteins (2018)
  • Author(s): Kim Kyongwan、Yoshinaga Natsuhiko、Bhattacharyya Sanjib、Nakazawa Hikaru、Umetsu Mitsuo、Teizer Winfried
  • Journal Title: Soft Matter Volume: 14 Issue: 17 Pages: 3221-3231
  • DOI: 10.1039/c7sm02298k
  • NAID: 130007736086
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] From hydrodynamic lubrication to many-body interactions in dense suspensions of active swimmers (2018)
  • Author(s): Yoshinaga Natsuhiko、Liverpool Tanniemola B.
  • Journal Title: The European Physical Journal E Volume: 41 Issue: 6 Pages: 76-76
  • DOI: 10.1140/epje/i2018-11683-x
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effective diffusion coefficient including the Marangoni effect (2018)
  • Author(s): Hiroyuki Kitahata and Natsuhiko Yoshinaga
  • Journal Title: The Journal of Chemical Physics Volume: 148 Issue: 13 Pages: 134906-134906
  • DOI: 10.1063/1.5021502
  • Peer Reviewed / Open Access
• [Journal Article] Hydrodynamic interactions in dense active suspensions: From polar order to dynamical clusters (2017)
  • Author(s): Natsuhiko Yoshinaga and Tanniemola B. Liverpool
  • Journal Title: Phys. Rev. E Volume: 96 Issue: 2
  • DOI: 10.1103/physreve.96.020603
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Simple Models of Self-Propelled Colloids and Liquid Drops: From Individual Motion to Collective Behaviors (2017)
  • Author(s): Natsuhiko Yoshinaga
  • Journal Title: J. Phys. Soc. Jpn. Volume: 86 Issue: 10 Pages: 101009-101009
  • DOI: 10.7566/jpsj.86.101009
  • NAID: 210000134525
  • Peer Reviewed
• [Presentation] Model Selection of PDE for Targeted Crystalline Patterns (2019)
  • Author(s): Natsuhiko Yoshinaga
  • Organizer: A3 Soft Matter Workshop 2019
  • Int'l Joint Research / Invited
• [Presentation] Collective behaviours of dense active suspensions: the role of hydrodynamic lubrication (2019)
  • Author(s): Natsuhiko Yoshinaga
  • Organizer: CECAM Workshop Emerging behaviour in active matter: computational challenges
  • Int'l Joint Research / Invited
• [Presentation] Geometric control of wave instability in Min oscillations (2019)
  • Author(s): Natsuhiko Yoshinaga
  • Organizer: Tohoku-Lorraine Conference 2019
  • Int'l Joint Research
• [Presentation] Cell-sized confinement controls generation and stability of a protein wave for spatiotemporal regulation in cells (2019)
  • Author(s): Natsuhiko Yoshinaga
  • Organizer: ReaDiNet 2019, Mathematical analysis for biology and ecology
  • Int'l Joint Research / Invited
• [Presentation] Model Selection of PDE for Targeted Crystalline Patterns (2019)
  • Author(s): Natsuhiko Yoshinaga
  • Organizer: IPAM Workshop II: Interpretable Learning in Physical Sciences
  • Int'l Joint Research
• [Presentation] アクティブ液晶液滴の自発運動 (2019)
  • Author(s): 義永 那津人
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 流体力学を伴う液滴の自発運動と相互作用 (2018)
  • Author(s): 義永 那津人
  • Organizer: 日本応用数理学会 2018年度年会
• [Presentation] キネシンによって駆動された微小管の集団回転運動 (2018)
  • Author(s): 義永 那津人
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] Min たんぱく質における波の形成と空間形状 (2018)
  • Author(s): 義永 那津人
  • Organizer: 数理研 第15回 生物数学の理論とその応用 -次世代の数理科学への展開-
  • Invited
• [Presentation] Dynamics of defects in active nematic liquid crystals (2018)
  • Author(s): Natsuhiko Yoshinaga
  • Organizer: CSIAM 2018 Annual Meeting
  • Int'l Joint Research / Invited
• [Presentation] Geometric control of wave instability in Min oscillations (2018)
  • Author(s): Natsuhiko Yoshinaga
  • Organizer: APEF2018
  • Int'l Joint Research
• [Presentation] 空間形状によるMinたんぱく質の非線形波のコントロール (2018)
  • Author(s): 義永 那津人
  • Organizer: 日本物理学会第73回年次大会
• [Presentation] Active Soft Materials: Self-propelled motion and its collective behaviours of colloids and liquid drops (2017)
  • Author(s): Natsuhiko Yoshinaga
  • Organizer: Modeling and Numerical Analysis of Nonlinear Phenomena: Fluid Dynamics, Motion of Interfaces, and Cell Biology
  • Int'l Joint Research / Invited
• [Presentation] Geometric Control of Wave Instability in Min Oscillations (2017)
  • Author(s): Natsuhiko Yoshinaga
  • Organizer: International Symposium on Fluctuation and Structure out of Equilibrium 2017 (SFS2017)
  • Int'l Joint Research
• [Presentation] 空間形状によるMinたんぱく質の非線形波のコントロール (2017)
  • Author(s): 義永 那津人
  • Organizer: 第55回日本生物物理学会年会
• [Book] Self-organized Motion: Physicochemical Design based on Nonlinear Dynamics (2019)
  • Author(s): Natsuhiko Yoshinaga and Shunsuke Yanunaka
  • Total Pages: 372
  • Publisher: Royal Society of Chemistry
  • ISBN: 9781788011662
• [Remarks] 研究代表者による研究内容に関するwebページ
  • URL: http://www.wpi-aimr.tohoku.ac.jp/~yoshinaga/
• [Remarks] ResearcherID
  • URL: http://www.researcherid.com/rid/G-3067-2011
• [Remarks] ResearchGate
  • URL: https://www.researchgate.net/profile/Natsuhiko_Yoshinaga