Development of three-dimensional catalysts with metallic glass nanowires

• Project/Area Number: 26870058
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Physical properties of metals/Metal-base materials; Nanomaterials engineering
• Research Institution: Nagano National College of Technology (2015); Tohoku University (2014)
• Principal Investigator: YAGINUMA Shin 長野工業高等専門学校, その他部局等, 講師 (80516518)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: アモルファス合金 / ナノワイヤー / ガスアトマイズ / 触媒

Outline of Final Research Achievements

We have studied the formation mechanism of Pd-based metallic glass wires and droplets in the gas atomization process. The diameters can be reached to nanoscale and strongly related to the viscosity of molten alloys. We demonstrate that the numbers of droplets and wires can be distinguished by the Ohnesorge number (Oh), which is the proportion of the time scale of spinnability to that of capillary instability. The diameter distributions follow the log-normal distribution function that indicates cascade fragmentation. The median diameter is employed for evaluation criteria in the product diameter. For droplets, the number significantly increases at Oh < 1 but the diameter gradually decreases. For wires, the number greatly decreases at Oh < 1 while the diameter steadies below 400 nm. Further, the wire diameter is quadrupled at Oh = 16 due to the high viscosity which suppresses both capillary breakup and ligament elongation.

Research Products

• [Journal Article] Log-normal diameter distribution of Pd-based metallic glass droplet and wire (2015)
  • Author(s): Shin Yaginuma, Chihiro Nakajima, Naoto Kaneko, Yoshihiko Yokoyama, and Koji S. Nakayama
  • Journal Title: Sci. Rep. Volume: 5 Issue: 1 Pages: 10711-10711
  • DOI: 10.1038/srep10711
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Hydrogels containing metallic glass sub-micron wires for regulating skeletal muscle cell behaviour (2015)
  • Author(s): S. Ahadian, R. B. Sadeghian, S. Yaginuma, J. Ram&#243;n-Azc&#243;n, Y. Nashimoto, X. Liang, H. Bae, K. Nakajima, H. Shiku, T. Matsue, K. S. Nakayama, and A. Khademhosseini
  • Journal Title: Biomater. Sci. Volume: 3 Issue: 11 Pages: 1449-1458
  • DOI: 10.1039/c5bm00215j
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Log-normal diameter distribution of Pd-based metallic glass droplet and wire (2015)
  • Author(s): Shin Yaginuma, Chihiro Nakajima, Naoto Kaneko, Yoshihiko Yokoyama, and Koji S. Nakayama
  • Journal Title: Scientific Reports Volume: 印刷中
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Metallic Glass Nanofibers in Future Hydrogel-based Scaffolds (2014)
  • Author(s): Ramin Banan Sadeghian, Samad Ahadian, Shin Yaginuma, Javier Ramón-Azcón, Xiaobin Liang, Ken Nakajima, Hitoshi Shiku, Tomokazu Matsue, Koji S. Nakayama, and Ali Khademhosseini
  • Journal Title: Proc. 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) Volume: － Pages: 5276-5279
  • DOI: 10.1109/embc.2014.6944816
  • Peer Reviewed
• [Presentation] Log-normal Diameter Distribution of Pd-based Metallic Glass Fiber (2015)
  • Author(s): Shin Yaginuma, Chihiro Nakajima, and Koji S. Nakayama
  • Organizer: 4th International Nanofiber Symposium (Nanofibers 2015)
  • Place of Presentation: Tokyo Institute of Technology, Ookayama, Tokyo（東京都目黒区）
  • Year and Date: 2015-10-15
  • Int'l Joint Research
• [Presentation] アモルファス合金ナノワイヤーの開発 (2015)
  • Author(s): 柳沼 晋，中山 幸仁
  • 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] アモルファス合金ファイバーに発現する対数正規分布則の解明 (2015)
  • Author(s): 柳沼晋，中島千尋，中山幸仁
  • Organizer: ナノファイバー学会第６回年次大会
  • Place of Presentation: 東京大学 弥生講堂 一条ホール（東京都文京区）
  • Year and Date: 2015-07-06
• [Presentation] Log-normal diameter distribution of Pd-based metallic glass droplet and wire (2015)
  • Author(s): S. Yaginuma, C. Nakajima, Y. Yokoyama, and K. S. Nakayama
  • Organizer: The AIMR International Symposium 2015 (AMIS 2015)
  • Place of Presentation: Sendai International Center（宮城県仙台市）
  • Year and Date: 2015-02-17 – 2015-02-19
• [Presentation] Temperature Dependence on the Droplet and Wire Formation of Pd-based Metallic Glass (2014)
  • Author(s): Shin Yaginuma, Yoshihiko Yokoyama and Koji S. Nakayama
  • Organizer: The 2nd International Symposium on the Functionality of Organized Nanostructures 2014 (FON'14)
  • Place of Presentation: Miraikan Hall, Aomi, Tokyo（東京都江東区）
  • Year and Date: 2014-11-27 – 2014-11-28
• [Presentation] アモルファス合金ワイヤーと粉体の直径分布解析 (2014)
  • Author(s): 柳沼晋，横山嘉彦，中山幸仁
  • Organizer: 日本金属学会2014年秋期(第155回)講演大会
  • Place of Presentation: 名古屋大学東山キャンパス（愛知県名古屋市）
  • Year and Date: 2014-09-24 – 2014-09-26
• [Remarks] アモルファス合金ワイヤーに発現する対数正規分布則の解明－材料科学と数学とのコラボ－
  • URL: http://www.wpi-aimr.tohoku.ac.jp/jp/news/press/2015/20150602_000565.html
• [Remarks] アモルファス合金ワイヤーに発現する対数正規分布則の解明－材料科学と数学とのコラボ－
  • URL: https://www.tohoku.ac.jp/japanese/2015/06/press20150528-02.html