2016 Fiscal Year Final Research Report
In-situ observation of dewetting phenomena by multi-quantum beam irradiation and investigation of their mechanism
| Project/Area Number |
26420661
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Physical properties of metals/Metal-base materials
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
YATSU Shigeo 北海道大学, 大学院工学研究院, 特任助教 (40111158)
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| Research Collaborator |
LEI Yanhua
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | ナノ粒子 / 表面プラズモン共鳴 / ナノ構造 / ナノ材料 / 微細構造解析 / その場観察 / 超高圧電子顕微鏡 / 濡れ性非濡れ性遷移 |
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| Outline of Final Research Achievements |
In this study, to investigate the mechanism of quantum beam irradiation induced dewetting phenomenon by image analysis using Quantum Beam High Voltage Electron Microscope in Hokkaido University, in-situ observation under co-irradiation with 100keV Ar ions and nanosecond-pulsed laser with 532 nm, or each quantum beam irradiation were done.
As a result of experiments, we succeeded to observe the behavior of Rayleigh instability during quantum beam irradiation induced dewetting of the noble metal changing from a rectangular shape to a spherical shape. As decreasing the thickness of the noble metal thin film, the average particle diameter of the nanoparticles is getting smaller than that of thicker one after dewetting. A blue shift of the absorption spectrum in the visible light region was confirmed due to the quantum effects.
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| Free Research Field |
量子ビームによるナノ構造解析とナノ材料創成への応用
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