2013 Fiscal Year Final Research Report
Science and applications of laser-induced multiphase plasmas
| Project Area | Creation of Science of Plasma Nano-Interface Interactions |
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| Project/Area Number |
21110004
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Hokkaido University (2010-2013)
Nagoya University (2009) |
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Principal Investigator |
SASAKI Koichi 北海道大学, 工学(系)研究科(研究院), 教授 (50235248)
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| Co-Investigator(Kenkyū-buntansha) |
KOSHIZAKI Naoto 北海道大学, 大学院工学研究院, 教授 (40344197)
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| Project Period (FY) |
2009-07-23 – 2014-03-31
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| Keywords | 多相混在プラズマ / レーザー / アブレーション / ナノ粒子 / 超臨界状態 / 液相 / キャビテーションバブル / 準安定相材料 |
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| Research Abstract |
We investigated the reaction field induced by liquid-phase laser ablation, which was treated as a method for producing a multiphase plasma consisting of solid (the target), liquid (the ambient liquid), gas (the cavitation bubble), and supercritical fluid (the ablation plasma). We focused on the growth processes of nanoparticles in liquid-phase laser ablation. We have found that atomic and molecular species ejected into the liquid are transported toward the inside of the cavitation bubble, and the growth of nanoparticles occurs inside the cavitation bubble. We have shown that the structure of nanoparticles is affected by the control of the dynamics of the cavitation bubble. Regarding application sides, we synthesized brookite-type titania and submicron-size spherical particles by laser irradiation in liquids.
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