| Project/Area Number |
18K13598
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 17010:Space and planetary sciences-related
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| Research Institution | National Institute for Environmental Studies |
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Principal Investigator |
Ishizuka Shinnosuke 国立研究開発法人国立環境研究所, 環境計測研究センター, JSPS特別研究員 (20817788)
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| Project Period (FY) |
2018-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | 核生成 / 相分離 / ダスト / シリケイト / 均質核生成 / 宇宙ダスト / 星周ダスト / その場測定 |
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| Outline of Final Research Achievements |
Nucleation, the creation of a new material phase from another, has long been enigmatic. Astronomical dust had been deemed to be formed from mother phase directly. I demonstrated that homogeneous nucleation of refractory oxide nanoparticles from vapor is multistep. Various nucleation pathways accompanied by changing chemical compositions, crystal structures, and shapes were elucidated.
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| Academic Significance and Societal Importance of the Research Achievements |
これまでダストの結晶構造，形態は生成した時点の温度・圧力条件で決定すると考えられてきた．本研究では，気相からの核生成過程とその赤外スペクトルを直接的に調べることに成功した．本研究は，核生成した直後の粒子は，最終的な結晶とは化学組成，結晶構造，形態が異なる場合があることを示し，これまでの想定を覆した点に学術的な意義がある．
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