Dynamics of charged colloids driven by diffusions of weak electrolytes

• Project/Area Number: 24540440
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biophysics/Chemical physics
• Research Institution: Nagoya City University
• Principal Investigator: OKUZONO Tohru 名古屋市立大学, 薬学研究科(研究院), 准教授 (10314725)
• Co-Investigator(Kenkyū-buntansha): YAMANAKA Junpei 名古屋市立大学, 大学院薬学研究科, 教授 (80220424)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 荷電コロイド / 結晶化 / 粒子シミュレーション / 連続体シミュレーション / コロイド結晶 / 高分子電解質 / 数値シミュレーション / 弱電解質

Outline of Final Research Achievements

Two models, particle model and continuum model, are constructed to describe dynamics of charged colloids under a gradient of base concentration. In these models, effects of dissociation reactions on the particle surfaces are taken into account. Numerical simulations show that crystal states and liquid states of particles can coexist and the base concentration gradient can transport the colloidal particles. These results are compared with experimental results.

Research Products

• [Journal Article] Thermoresponsive Colloidal Crystallization Using Adsorption of Ionic Surfactants (2014)
  • Author(s): A. Toyotama, M. Yamamoto, Y. Nakamura, C. Yamazaki, A. Tobinaga, Y. Ohashi, T. Okuzono, H. Ozaki, F. Uchida, J. Yamanaka
  • Journal Title: Chem. Mater. Volume: 26 Issue: 14 Pages: 4057-4059
  • DOI: 10.1021/cm500580q
  • Peer Reviewed
• [Journal Article] Mesoscopic simulation of phase behaviors and structures in an amphiphile-solvent system (2014)
  • Author(s): K. Yamada, E. Yasuno, Y. Kawabata, T. Okuzono, T. Kato
  • Journal Title: Phys. Rev. E Volume: 89 Issue: 6
  • DOI: 10.1103/physreve.89.062310
  • Peer Reviewed
• [Journal Article] Exclusion of impurity particles in charged colloidal crystals (2014)
  • Author(s): Koki Yoshizawa, Akiko Toyotama, Tohru Okuzono and Junpei Yamanaka
  • Journal Title: Soft Matter Volume: 10 Issue: 19 Pages: 3357-3361
  • DOI: 10.1039/c3sm52912f
  • Peer Reviewed
• [Journal Article] Recrystallization and Zone Melting of Charged Colloids by Thermally Induced Crystallization (2013)
  • Author(s): Mariko Shinohara, Akiko Toyotama, Misaki Suzuki, Yukihiro Sugao, Tohru Okuzono, Fumio Uchida, and Junpei Yamanaka
  • Journal Title: Langmuir Volume: 29 Issue: 31 Pages: 9668-9676
  • DOI: 10.1021/la401410g
  • Peer Reviewed
• [Journal Article] Striation Pattern of Impurity Particles in Charged Colloidal Crystals Formed by Stepwise Thermally Induced Crystallization (2012)
  • Author(s): Yukihiro Sugao
  • Journal Title: Chemistry Letters Volume: 41 Issue: 10 Pages: 1163-1165
  • DOI: 10.1246/cl.2012.1163
  • NAID: 10031120616
  • Peer Reviewed
• [Presentation] 塩基濃度勾配による高分子電解質の輸送 (2015)
  • Author(s): 奥薗 透、関 友崇、豊玉彰子、山中淳平
  • Organizer: 日本物理学会第70回年次大会
  • Place of Presentation: 早稲田大学早稲田キャンパス（東京都・新宿区）
  • Year and Date: 2015-03-23
• [Presentation] Numerical study of cluster formation in binary charged colloids (2015)
  • Author(s): T. Okuzono, K. Odai, T. Masuda, A. Toyotama, J. Yamanaka
  • Organizer: Physics of Structural and Dynamical Hierarchy in Soft Matter
  • Place of Presentation: 東京大学生産技術研究所（東京都・目黒区）
  • Year and Date: 2015-03-16
• [Presentation] 反対電荷をもったコロイド粒子のクラスター形成 (2015)
  • Author(s): 増田竜大、小田井香奈、奥薗透、豊玉彰子、山中淳平
  • Organizer: 第4回ソフトマター研究会
  • Place of Presentation: 名古屋大学（愛知県・名古屋市）
  • Year and Date: 2015-01-06
• [Presentation] 塩基濃度勾配下での荷電コロイドの結晶化 (2014)
  • Author(s): 関友崇、奥薗透、豊玉彰子、山中淳平
  • Organizer: 日本物理学会 2014年秋季大会
  • Place of Presentation: 中部大学春日井キャンパス（愛知県・春日井市）
  • Year and Date: 2014-09-08
• [Presentation] Dynamics of phase-separated domains of polyelectrolytes under pH gradient (2014)
  • Author(s): T. Okuzono, A. Toyotama, J. Yamanaka
  • Organizer: 9th Liquid Matter Conference
  • Place of Presentation: リスボン（ポルトガル）
  • Year and Date: 2014-07-22
• [Presentation] 塩基濃度勾配下における高分子電解質ドメインのダイナミクス (2014)
  • Author(s): 奥薗透、豊玉彰子、山中淳平
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学湘南キャンパス（神奈川県平塚市）
• [Presentation] Dynamics of polyelectrolyte domains under a gradient of weak electrolyte concentration (2013)
  • Author(s): Tohru Okuzono, Akiko Toyotama, and Junpei Yamanaka
  • Organizer: International Soft Matter Conference
  • Place of Presentation: ローマ大学（ローマ、イタリア）
• [Presentation] 弱電解質拡散場中の高分子電解質ドメインのダイナミクス (2013)
  • Author(s): 奥薗透、豊玉彰子、山中淳平
  • Organizer: ソフトマター研究会
  • Place of Presentation: 首都大学東京（八王子市）
• [Presentation] Numerical study of dynamics of charged colloidal crystals with a coarse-grained continuum model
  • Author(s): Tohru Okuzono
  • Organizer: International Association of Colloid and Interface Scientists
  • Place of Presentation: 仙台市
• [Presentation] 塩基拡散による荷電コロイド結晶歪みのモデル化
  • Author(s): 奥薗 透
  • Organizer: 第2回ソフトマター研究会
  • Place of Presentation: 福岡市
• [Presentation] 塩基拡散場中のコロイドダイナミクス
  • Author(s): 奥薗 透
  • Organizer: 日本物理学会 第68回年次大会
  • Place of Presentation: 東広島市
• [Book] Pattern Formations and Oscillatory Phenomena (Chapter 5) (2013)
  • Author(s): Shuichi Kinoshita ed., Junpei Yamanaka, Tohru Okuzono, and Akiko Toyotama
  • Total Pages: 263
  • Publisher: Elsevier