| Project/Area Number |
24651171
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Microdevices/Nanodevices
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| Research Institution | Osaka University |
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Principal Investigator |
HIRAHARA Kaori 大阪大学, 工学(系)研究科(研究院), 准教授 (40422795)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | ナノアクチュエータ / バイメタル / ナノチューブ / その場TEM観察 / ナノ力学特性制御 |
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| Research Abstract |
We have studied bimetal-type components consisting of a single nanotube with a platinum layer to realize heat-driven actuators at nanometer scale. The component was fabricated by electron beam deposition of Pt onto a boron nitride nanotube (BNNT) or a carbon nanotube (CNT). Thermal behavior during heating was examined by transmission electron microscopy equipped with a heating holder. As the result, Pt showed uniform thermal expansion at 673 K, however the bimetallic deformation of pristine Pt-nanotube components was hampered by the high rigidity of nanotubes and the plastic deformation of Pt layer due to the grain growth above 473 K. To solve this problem, individual nanotubes were treated by argon ion etching to control their rigidity. Accordingly, ion-treated Pt-nanotube components showed bimetallic deformation reversibly by the temperature swings between 293 and 373 K. In addition, it was confirmed that the smallest diameter to be operated as the bimetallic nanoactuator was 20 nm.
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