2022 Fiscal Year Final Research Report
Formation of nanoparticle composites using a collision process of two plasmas propagating at supersonic speeds
Project/Area Number |
19K03815
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 14030:Applied plasma science-related
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Research Institution | Konan University |
Principal Investigator |
Umezu Ikurou 甲南大学, 理工学部, 教授 (30203582)
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Co-Investigator(Kenkyū-buntansha) |
吉田 岳人 阿南工業高等専門学校, 創造技術工学科, 教授 (20370033)
福岡 寛 奈良工業高等専門学校, 機械工学科, 准教授 (40582648)
青木 珠緒 (松本珠緒) 甲南大学, 理工学部, 教授 (80283034)
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Project Period (FY) |
2019-04-01 – 2023-03-31
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Keywords | レーザーアブレーション / 衝撃波 / プルーム / ナノ粒子 / 複合ナノ粒子 / プラズマ衝突 |
Outline of Final Research Achievements |
Two targets (Si and Ge) were laser ablated to form nanoparticle composites. The targets were positioned so that the two plumes collided head-on; at gas pressures above 2000 Pa, the plumes did not mix due to collisions with counter-propagating shock waves, and the structure of the deposits was a combination of Si and Ge nanoparticle aggregates. This indicates that nanoparticles aggregate in each plume and that the combination of Si nanoparticle aggregates and Ge nanoparticle aggregates is occurring. At 500 Pa, the two plumes mixed after a central collision and then spread by the flow formed by the back-propagating shock wave. The structure of the deposit was an aggregate of Si and Ge alloy nanoparticles. This indicates that the alloy nanoparticles were formed in the mixed plume and reached the substrate. These results suggest that the structure of the nanoparticle composite can be controlled by controlling the collision process of the plume.
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Free Research Field |
半導体材料
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Academic Significance and Societal Importance of the Research Achievements |
これまでに、2つのレーザー誘起プラズマの衝突に関する研究はあったが、その混合過程に関しての明快な実験結果は存在しなかった。本研究では2種類のターゲットを用い、プラズマを分光することによって混合過程を明らかにした。その結果、対向して進展する衝撃波の影響が混合過程に大きく影響し、衝撃波の制御がナノ粒子集合体の構造に重要であることを示した。
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