Development of plasma materials processing using spatiotemporally-controlled micro-droplet

2022 Fiscal Year Final Research Report

• Project/Area Number: 19H01885
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 14030:Applied plasma science-related
• Research Institution: The University of Tokyo
• Principal Investigator: Ito Tsuyohito 東京大学, 大学院新領域創成科学研究科, 准教授 (70452472)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 大気圧非平衡プラズマ / インクジェット / 単分散粒子 / 描画 / 電界計測

Outline of Final Research Achievements

The research has been performed using atmospheric-pressure non-equilibrium plasma and spatiotemporally-controlled liquid droplets, both by fundamental and applied aspects. As the diagnostics of the reaction environments, it has been revealed that particles provided by plasma play a certain role for the evaporation of the droplets. Highly sensitive electric field measurements have been demonstrated using laser diagnostics under atmospheric pressure conditions.
By integrating atmospheric pressure non-equilibrium plasma with inkjet printing, it becomes possible to incorporate the advantages of low temperature, high speed, high resolution, and in-situ utilization of plasma-generated reactive species, as compared to post-heat treatments. The utilization of micro-droplets as pseudo-closed reaction environments has enabled the synthesis of particles with exceptionally high monodispersity.

Free Research Field

プラズマ材料科学

Academic Significance and Societal Importance of the Research Achievements

本研究では、プラズマ援用インクジェットプリンティングの深化をもたらすのみならず、サイズの揃った粒子合成手法の創出をもたらす等、プラズマ誘起液相反応の材料合成における可能性の一端を示すことができた。
また、バイオ応用、農業応用、環境応用など、多彩な広がりを見せているプラズマ誘起液相反応の理解においても、液滴の蒸発現象を通じ、深める事できた。更に、プラズマ反応場を理解するうえで重要なパラメータである電界の高感度非接触計測をもたらした点も、今後の関連分野の発展に貢献し得る成果である。