2015 Fiscal Year Final Research Report
Femtosecond laser material processing for inducing advanced functionalities on metal surface
| Project/Area Number |
25420728
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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 |
Composite materials/Surface and interface engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
SAKABE SHUJI 京都大学, 化学研究所, 教授 (50153903)
SAKAGAMI HITOSHI 核融合科学研究所, ヘリカル研究部, 教授 (30254452)
TOKITA SHIGEKI 京都大学, 化学研究所, 助教 (20456825)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | ナノ構造形成 / 非晶質化 / レーザー加工 / 金属 |
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| Outline of Final Research Achievements |
For inducing advanced functionalities on metal surface with femtosecond laser material processing, we have done the experiment for producing an amorphous metal on nanostructured surface. Additionally, formation mechanism of the nanostructured metal surface has also been investigated. We found that the size of the nanostructures, its orientation direction, and its amorphous state can be controlled by irradiation of the laser pulses with appropriate choice of laser condition. To discuss formation mechanism, all the ablation thresholds for metals previously published were plotted as a function of work function with our obtained data. We found that the ablation thresholds were good correlation with work function of metals. Experimental data suggested that the femtosecond laser ablation is mainly due to multi-photon absorption and optical field ionization. These findings are useful information to produce advanced functionalities on metal surface with femtosecond laser material processing.
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| Free Research Field |
フェム秒レーザー加工
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