| Project/Area Number |
15H06310
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Nano/Microsystems
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| Research Institution | Kyoto University |
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Principal Investigator |
Namura Kyoko 京都大学, 工学研究科, 助教 (20756803)
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| Project Period (FY) |
2015-08-28 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | マランゴニ対流 / マイクロバブル / 金ナノ粒子 / 光熱変換 / 熱プラズモニック効果 / マイクロ流体 / マイクロ・ナノデバイス / 動的斜め蒸着 / サーモプラズモニクス / 熱工学 |
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| Outline of Final Research Achievements |
In this study, manipulation and mixing of small amount of water has been demonstrated by using surface tension of a tiny bubble. By focusing a laser onto a nanostructured thin film, the local temperature of water on the laser spot rises and a bubble is generated. The localized heat generation disproportions the surface tension of the bubble and induces flow around it. By tuning the laser spot position and power, the flow has been controlled to demonstrate particles focusing and flow direction switching in a small fluidic cell. In addition, by eliminating dissolved gasses in water, we successfully demonstrated generation of a tiny water vapor microbubble in the water. The water vapor microbubble involves rapid flow with flow speed of more than 1 m/s. Because the water vapor bubble exists only during the local heating of the water, it is useful as a micro-mixer that is producible and removable in any places and any time in the micrometer-size channel.
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