New approach to dielectric relaxation of nanometer-scale systems

• Project/Area Number: 26390069
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: Kansai Medical University
• Principal Investigator: KAGESHIMA Masami 関西医科大学, 医学部, 教授 (90251355)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 原子間力顕微鏡 / ソフトマター / 緩和 / 粘弾性 / 非線形 / 水和高分子 / 誘電緩和 / 分極 / 非線形流体 / 誘電応答 / ガラス状態 / 相転移

Outline of Final Research Achievements

Viscoelasticity and dielectric relaxation of nanometer-scale soft-matter systems were studied by using atomic force microscopy technique. In the former research a marked non-Newtonian character of nanoconfined water between hydrophilic surfaces was reported. A remarkably discrete dependence of relaxation time of hydrated biopolymer that differs strikingly from macroscopic non-Newtonian behavior was also discovered. Its thorough analysis will provide a new subject of forthcoming new research. On the other hand, a dielectric relaxation profile of polymer thin film curiously different from a plausible relaxation function was obtained in relaxation measurement by modulating polarization of AFM probe via external electric field. It suggests necessity of remodeling the probe-sample system for more appropriate analysis of dielectric relaxation in the present method.

Research Products

• [Journal Article] Layer-resolved relaxation dynamics of confined water analyzed through subnanometer shear measurement (2014)
  • Author(s): Ｍａｓａｍｉ Ｋａｇｅｓｈｉｍａ
  • Journal Title: Ｅｕｒｏｐｈｙｓｉｃｓ Ｌｅｔｔｅｒｓ Volume: 107 Issue: 6 Pages: 66001-66001
  • DOI: 10.1209/0295-5075/107/66001
  • Peer Reviewed
• [Presentation] Probing Origin of Non-Newtonian Fluidity with Sub-nanometer Shear (2016)
  • Author(s): Masami Kageshima, Shintaro Itoh and Kenji Fukuzawa
  • Organizer: 24th International Colloquium on Scanning Probe Microscopy (ICSPM24)
  • Place of Presentation: ホノルル（米国）
  • Year and Date: 2016-12-14
  • Int'l Joint Research
• [Presentation] 水和した生体適合性高分子が示す微視的非ニュートン挙動 (2016)
  • Author(s): 影島 賢巳、伊藤 伸太郎、福澤 健二
  • Organizer: 第１３回バイオオプティクス研究会
  • Place of Presentation: 前橋テルサ、前橋工科大学（群馬県・前橋市）
  • Year and Date: 2016-12-02
  • Invited
• [Presentation] Nonlinear response of hydrated polymer under sub-nanometer oscillatory shear (2016)
  • Author(s): Masami Kageshima, Shintaro Itoh and Kenji Fukuzawa
  • Organizer: Annual Meeting on Rheology and Fluid Mechanics
  • Place of Presentation: アリカンテ（スペイン）
  • Year and Date: 2016-11-10
  • Int'l Joint Research
• [Presentation] Viscoelasticity of Hydrated Phospholipid Polymer Measured with Sub-Nanometer Shear (2016)
  • Author(s): Masami Kageshima, Shintaro Itoh and Kenji Fukuzawa
  • Organizer: International Conference on Rheology (ICR2016)
  • Place of Presentation: 京都テルサ（京都府・京都市）
  • Year and Date: 2016-08-08
  • Int'l Joint Research
• [Presentation] AFM for probing dynamical properties of nanometer-scale systems (2015)
  • Author(s): Masami Kageshima
  • Organizer: EMN Bangkok Meeting
  • Place of Presentation: バンコク（タイ）
  • Year and Date: 2015-11-10
  • Int'l Joint Research / Invited
• [Presentation] 原子間力顕微鏡を用いた誘電緩和計測 (2015)
  • Author(s): 影島賢巳
  • Organizer: 第76回 応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県・名古屋市）
  • Year and Date: 2015-09-13
• [Presentation] せん断応答から見たナノ空間水分子の非線形緩和 (2014)
  • Author(s): 影島賢巳
  • Organizer: 第11回バイオプティクス研究会
  • Place of Presentation: 大阪大学（大阪府・豊中市）
  • Year and Date: 2014-12-06
  • Invited
• [Presentation] Non-Newtonian Relaxation of Confined Water Layers Studied with Sub-nanometer Shear Modulation of AFM Probe (2014)
  • Author(s): Ｍａｓａｍｉ Ｋａｇｅｓｈｉｍａ
  • Organizer: 17th International Conference on Non-contact Atomic Force Microscopy
  • Place of Presentation: つくば国際会議場（茨城県・つくば市）
  • Year and Date: 2014-08-06
• [Presentation] s hydrated water in nanometer-scale space glassy at room temperature?–a molecularly resolved shear study with atomic force microscopy (2014)
  • Author(s): Ｍａｓａｍｉ Ｋａｇｅｓｈｉｍａ
  • Organizer: 9th Liquid Matter Conference
  • Place of Presentation: リスボン（ポルトガル）
  • Year and Date: 2014-07-24