Development of ultimate imaging technique for dynamical and quantitative analyses

• Project/Area Number: 18K19010
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 28:Nano/micro science and related fields
• Research Institution: Japan Fine Ceramics Center
• Principal Investigator: Tadahiro Kawasaki 一般財団法人ファインセラミックスセンター, その他部局等, 主任研究員 (10372533)
• Project Period (FY): 2018-06-29 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000); Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2018: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
• Keywords: 電子顕微鏡 / 軽元素 / 結像法 / ホローコーン照明 / その場観察 / 動的 / 高分解能 / グラフェン / 高空間分解能 / 高時間分解能 / 可視化技術 / 位相像 / 液中観察

Outline of Final Research Achievements

A novel imaging technique based on electron microscopy has been investigated to visualize in-situ motion of atoms and ions in functional materials such as battery reactions and so on with high-resolution. For this purpose, we have newly proposed enehanced hollow-cone illumination TEM imaging method. In order to determine optimal imaging conditions in this method, imaging simulation has been done. As a result, spherical aberration remaining in the corresponding optical system must be reduced to less than several micrometer. Then, light element ions, such as O ion in SrTiO3 and Li ion in LiCoO2, can be clearly visualize. These results demonstrate that the proposed method is very effective to image various kind of light elements.

Academic Significance and Societal Importance of the Research Achievements

蓄電池や燃料電池、高性能誘電体など種々の機能性材料において、その性能を左右するものの一つとして、材料内部の酸素イオン、リチウムイオンなどの挙動がある。その振る舞いを動的に観察するには、電子顕微鏡のもつ高い空間・時間分解能が有用であるが、電子顕微鏡では軽元素を可視化するのは非常に困難であった。本研究課題で提案した手法は、この課題を解決するものであり、新たな材料解析手法としての可能性を明確にすることができた。

Research Products

• [Journal Article] Atomic-Level Observation of Electrochemical Platinum Dissolution (2019)
  • Author(s): Shinya Nagashima, Toshihiro Ikai, Yuki Sasaki, Tadahiro Kawasaki, Tatsuya Hatanaka
  • Journal Title: Nano Letter Volume: 19 Issue: 10 Pages: 7000-7005
  • DOI: 10.1021/acs.nanolett.9b02382
  • Peer Reviewed
• [Journal Article] Effect of pulse parameter change on a-SiCN diaphragms for environmental cells fabricated by (2019)
  • Author(s): Murano Masanori、Matsutani Takaomi、Kawasaki Tadahiro
  • Journal Title: Vacuum Volume: 57 Pages: 60-64
  • DOI: 10.1016/j.vacuum.2019.03.043
  • Peer Reviewed
• [Journal Article] High-pressure Electron Microscopy with Graphene Sandwich (2018)
  • Author(s): 佐々木祐生、川﨑忠寛
  • Journal Title: Materia Japan Volume: 57 Issue: 12 Pages: 610-610
  • DOI: 10.2320/materia.57.610
  • NAID: 130007538901
  • ISSN: 1340-2625, 1884-5843
  • Year and Date: 2018-12-01
  • Peer Reviewed
• [Journal Article] Surface modification of triacetylcellulose by low-energy nitrogen ions for (2018)
  • Author(s): Takaomi Matsutani, Masanori Murano, Tadahiro Kawasaki
  • Journal Title: Surface & Coatings Technology Volume: 344 Pages: 58-61
  • DOI: 10.1016/j.surfcoat.2018.02.092
  • Peer Reviewed
• [Presentation] 環境電子顕微鏡によるガス・液中その場観察 (2019)
  • Author(s): 川崎忠寛
  • Organizer: 表面分析研究会
• [Presentation] 高分解能化を目指したSEMレンズの開発 (2019)
  • Author(s): 川崎忠寛
  • Organizer: SCANTECH2019
• [Presentation] 汎用SEM用の電界型収差補正器の開発 (2018)
  • Author(s): 川﨑忠寛、吉田竜視、加藤丈晴、野間口恒典、本村俊一、西中健一、揚村寿英、富田正弘、生田孝
  • Organizer: 日本顕微鏡学会学術講演会
• [Presentation] Spherical Aberration Correction for SEMs with Electrostatic-type compact Cs-corrector (2018)
  • Author(s): Tadahiro Kawasaki, Ryuji Yoshida, Takeharu Kato1, Tsunenori Nomaguchi, Shunichi Motomura, Kenichi Nishinaka, Toshihide
  • Organizer: Microscopy ＆Microanalysis 2018
• [Book] 最新実用真空技術総覧 (2019)
  • Author(s): 川﨑忠寛、他
  • Total Pages: 1095
  • Publisher: エヌ・ティー・エス
  • ISBN: 9784860435592
• [Book] Compendium of Surface and Interface Analysis (2018)
  • Author(s): T. Kawasaki, et al.
  • Total Pages: 853
  • Publisher: Springer
  • ISBN: 9789811061554